Nickel-zinc ferrite (Fair-Rite 43 Material, EMI suppression) NiZn
Nickel-zinc spinel ferrite · CAS 12645-50-0
Also known as 43 Material
Fair-Rite 43 Material is a nickel-zinc spinel ferrite, a sintered ceramic, used to suppress conducted electromagnetic interference on cables and in high-frequency common-mode chokes.
Evidence level
2 of 5
Lab-measured
- 0Predicted only. No one has made it, or no measurement exists.
- 1Calculated. Only calculated or predicted values from sources.
- 2Lab-measured. Measured properties with their conditions stated.
- 3Space-relevant tests. Measured in conditions relevant to space, such as vacuum or atomic oxygen.
- 4Ground-qualified. Qualified for an application on the ground.
- 5Flown or field-proven. Flight or field results exist.
Initial permeability
800
Curie temperature
above 130 °C
Flux density
3500 gauss
Recipe, share of the weight
- Fe2O3 65%Iron oxide
- ZnO 21%Zinc oxide
- NiO 10%Nickel oxide
- CuO 4%Copper oxide
Best for
Suppressing conducted EMI on cables and wiring from 20 MHz to 250 MHz
Weakest at
Permeability changes by 1.25 %/°C over 20 to 70 °C (datasheet), and no space test data were found
Risk at a glance
- People None found. Not classified hazardous by the supplier
- If it fails Low. Permeability drifts with temperature
- Corrosion Low. The supplier safety data sheet describes the sintered ferrite as insoluble in water and not reactive with water.
Quick facts: NiZn
| Property | Value | Basis |
|---|---|---|
| Density | 4.8 g/cm³ | 1 sourced value |
What is the density of Nickel-zinc ferrite (NiZn)?
Nickel-zinc ferrite (NiZn) has a density of 4.8 g/cm³. The source and test conditions are listed in the properties table on this page.
What is Nickel-zinc ferrite (NiZn) used for?
Uses recorded in the sources include Cable EMI suppression cores and beads; High-frequency common-mode choke.
Why it exists
Fair-Rite 43 Material is a nickel-zinc spinel ferrite, a sintered ceramic core used to suppress conducted electromagnetic interference (EMI) on cables and in common-mode chokes. Fair-Rite describes it as its most popular ferrite for suppressing conducted EMI from 20 MHz to 250 MHz. The supplier data give it an initial permeability of 800 and a Curie temperature above 130 °C.
Where it's used
Cable EMI suppression
Fair-Rite lists EMI suppression beads, beads on leads, round and flat cable EMI suppression cores and snap-on cores as products made in 43 Material, for suppression of conducted EMI from 20 MHz to 250 MHz.
High-frequency common-mode chokes
The 43 data sheet says the grade is also used for inductive applications such as high frequency common-mode chokes.
Electronics industry
The supplier SDS gives the product use as the electronics industry.
Recipe
Nickel-zinc spinel ferrite; nominal oxide composition 65 wt% Fe2O3, 21 wt% ZnO, 10 wt% NiO and 4 wt% CuO (Fair-Rite 43 Material Grade, RoHS composition sheet)
Fair-Rite 43 Material is a nickel-zinc spinel ferrite. Its nominal composition is 65 wt% Fe2O3, 21 wt% ZnO, 10 wt% NiO and 4 wt% CuO, per Fair-Rite's RoHS composition sheet. The supplier SDS calls the part a sintered ceramic component.
| Ingredient | Share of the weight | What it does |
|---|---|---|
| Iron oxide Fe2O3 | 65% | Main component by weight in the nominal composition. |
| Zinc oxide ZnO | 21% | Zinc component of the nominal composition. |
| Nickel oxide NiO | 10% | Nickel component of the nominal composition. The SDS names the material as nickel zinc spinel ferrite. |
| Copper oxide CuO | 4% | Minor component of the nominal composition. |
Weight shares are as printed in the sources.
What it can do
Initial permeability
800
measured
Initial permeability is 800 for the 43 grade, measured on standard toroids at 25 degC and 10 kHz, per the Fair-Rite data sheet.
Curie temperature
above 130 °C
measured
The Curie temperature is printed as above 130 °C. The data sheet gives only the lower bound.
Flux density
3500 gauss
measured
The data sheet prints a flux density of 3500 gauss at a field strength of 10 oersted for the 43 grade.
How it compares
The 43 grade is a nickel-zinc ferrite for EMI suppression from 20 MHz to 250 MHz, with initial permeability 800 and Curie temperature above 130 °C. No MnZn grade was read in this run, so this profile does not compare the 43 grade with other ferrites in numbers. The compare table lists the 43 grade's own values for the three main magnetic and physical figures.
The same measurements for each material, so you can compare them. Each row names the key condition under the value; the full conditions and methods are in the numbered notes under Technical details.
| Measurement | NiZn |
|---|---|
| Physical and electrical | |
| Flux density B at field strength HValue in the 43 Material characteristics table | 3500 gauss |
| Residual flux density BrValue in the 43 Material characteristics table | 2200 gauss |
| Specific gravity of the 43 Material Grade component (printed as specific gravity)Value printed in the supplier SDS, section 9 | 4.8 g/cm³7 |
| Temperature behavior | |
| Temperature coefficient of initial permeabilityValue in the 43 Material characteristics table | 1.25 %/°C |
| Curie temperatureValue in the 43 Material characteristics table | > 130 °C |
| Other measurements | |
| Initial permeability (magnetic, dimensionless as printed) | 800 -1 |
| Coercive force HcValue in the 43 Material characteristics table | 0.36 oersted |
| Magnetic loss factor (tan delta / initial permeability) | 100 10^-62 |
| Frequency range for conducted EMI suppression | 20 MHz3 |
| Boiling point (upper bound, as printed in the SDS)Value printed in the supplier SDS, section 9 | < 2500 °F4 |
| Real part of complex permeability at 1 MHz (CSV column headed µs', the leading Greek letter is garbled in the download) | 851.4 -5 |
| Imaginary part of complex permeability at 1 MHz (CSV column headed µs'', the leading Greek letter is garbled in the download) | 48 -6 |
Why choose it, and why not
Good for
- Suppressing conducted EMI on cables from 20 MHz to 250 MHz. The data sheet names this as its main use.
- High-frequency common-mode chokes, per the data sheet.
Watch out for
- Permeability changes by 1.25 %/°C over 20 to 70 °C.
- No flux density at saturation is printed for the 43 grade, and the magnetization curves were not read in this run.
- No space, vacuum or radiation test data were found for this grade.
The 43 grade has manufacturer data for its main magnetic figures and a supplier safety data sheet. Space-environment data are missing from every source read here.
Technical details
For scientists and researchers. Everything above comes from the record below: every number with its method, its conditions and its source.
Other names and standards
The same grade under other systems, as datasheets and standards print them. Each code was checked against the page it comes from.
| System | Codes |
|---|---|
| Trade name | 43 Material |
Notes
The method, full conditions and any caveat for the numbered rows above.
| # | Measurement | Method | Conditions | Caveat |
|---|---|---|---|---|
| 1 | Initial permeability (magnetic, dimensionless as printed) | Value in the 43 Material characteristics table, measured by the manufacturer | field B below 10 gausstest standard toroids 18/10/6 mm at 25 °C and 10 kHz unless otherwise indicated (data sheet footnote) | — |
| 2 | Magnetic loss factor (tan delta / initial permeability) | Value in the 43 Material characteristics table; printed as 100 at 1.0 MHz with the unit 10^-6 and MHz in the table | frequency 1.0 MHz | The table prints the loss factor as tan delta over mu-i in units of 10^-6 at the frequency MHz. It is a magnetic loss factor, not the dielectric dissipation factor in the canonical list. |
| 3 | Frequency range for conducted EMI suppression | Range stated in the 43 Material data sheet introduction | application suppression of conducted EMI on cables and wiring | — |
| 4 | Boiling point (upper bound, as printed in the SDS) | — | basis printed as '< 2500 °F' in the SDS; an upper bound, not a measured boiling pointform sintered component, 43 Material Grade | The SDS gives the boiling point only as an upper bound. No measured boiling point for this grade was found. |
| 5 | Real part of complex permeability at 1 MHz (CSV column headed µs', the leading Greek letter is garbled in the download) | Value in the 43 Material complex permeability CSV, row Frequency(Hz) 1000000 | frequency 1000000 Hz (1 MHz)equipment named in the CSV header (HP4284A with 16047E fixture, and E4991A with 16454A fixture) | — |
| 6 | Imaginary part of complex permeability at 1 MHz (CSV column headed µs'', the leading Greek letter is garbled in the download) | Value in the 43 Material complex permeability CSV, row Frequency(Hz) 1000000 | frequency 1000000 Hz (1 MHz)equipment named in the CSV header (HP4284A with 16047E fixture, and E4991A with 16454A fixture) | — |
| 7 | Specific gravity of the 43 Material Grade component (printed as specific gravity) | — | form sintered component, 43 Material Grade | Fair-Rite's generic Ferrite Material Constants block on its toroid product page prints about 4.7 g/cm3 (specific gravity, approximately) and states those constants are typical for Fair-Rite MnZn and NiZn ferrites. That figure is not specific to the 43 grade, so it is not used here. The two figures are recorded side by side for the reader. |
Corrosion and compatibility
What happens when it meets other materials and environments.
| Environment | Concern | What happens |
|---|---|---|
| Water | low | The supplier safety data sheet describes the sintered ferrite as insoluble in water and not reactive with water.1 |
| # | Environment | Details | Test conditions |
|---|---|---|---|
| 1 | Water | The SDS lists solubility as insoluble and reactivity in water as none, and gives stability as stable and the material as inert. It gives no test data on humidity, ageing or chemical exposure. | material 43 Material Grade sintered componenttest no test; supplier SDS statements only |
Risks and side effects
Hazards to people, what happens when a cell overheats, and how the material is handled and stored.
For people
The supplier SDS lists no OSHA Hazard Communication classification and no physical or health hazard for the sintered component. Its toxicology and ecology entries are marked N/A.
- The component
- The SDS says the material is inert and insoluble in water, and lists no hazardous decomposition. It is a sintered ceramic part, not a powder.
- Composition
- The SDS lists nickel compounds below 23 wt%, copper compounds below 8 wt% and zinc compounds below 23 wt%, and notes them as EPCRA Section 313 chemicals.
- Dust
- Eye protection is safety glasses. Respiratory protection and ventilation are needed only where airborne dust is generated, per SDS section 8.
In service
The datasheet names cable EMI suppression and high-frequency common-mode chokes as uses of this grade.
- Temperature
- Initial permeability changes by 1.25 %/°C over 20 to 70 °C, per the 43 data sheet. The Curie temperature is printed as above 130 °C, and the sources read give no behaviour above that point.
- Storage
- The SDS lists no precautions for handling and storage.
Test details
The original wording and numbers from the sources, for readers who want them.
Failure risks
| Failure | Trigger and consequence |
|---|---|
| Permeability drifts with temperaturelow severity | Operation across 20 to 70 °CInitial permeability changes by 1.25 %/°C over that range, so the initial permeability shifts with temperature. |
Handling and storage
- Wear safety glasses for eye protection (SDS section 8).
- No respiratory protection or ventilation is required unless airborne dust is generated (SDS section 8).
- Clean up spills by wiping off with a brush and cloth (SDS section 6).
- The SDS lists no precautions for handling and storage (SDS section 7).
Supply and geography
How common the raw materials are and where they come from.
Nickel
- Top producers (2025)
- Indonesia 66.7%, Philippines 6.9%, Russia 5.1%, Canada 3.6%
- Critical mineral lists
- US: listed
- Recycling
- USGS: nickel recovered from scrap accounted for approximately 60% of apparent consumption in 2025.
Zinc
- Top producers (2025)
- China 31.5%, Peru 11.5%, Australia 8.5%
- Critical mineral lists
- US: listed
- Recycling
- USGS: refined zinc produced in the United States was recovered from secondary materials at both primary and secondary smelters (no percentage given).
Iron
- Top producers (2025)
- Australia 37.7%, Brazil 16.2%, India 11.9%, China 11.2%
- Critical mineral lists
- US: not listed
- Recycling
- USGS iron ore chapter: 'Recycling: None.' It refers readers to the Iron and Steel Scrap chapter.
Documents
Datasheets, safety data sheets, papers and standards you can open.
| Document | Type | Year |
|---|---|---|
| Safety Data Sheet: Soft Ferrite component, 43 Material Grade (Fair-Rite Products Corp.) | sds | 2015 |
| 43 Material Data Sheet (Fair-Rite) | datasheet | 2026 |
| 43 Material Grade Nominal Chemical Composition, Fair-Rite P/N 5943000301 (RoHS sheet) | datasheet | 2005 |
| USGS Mineral Commodity Summaries 2026: Nickel | report | 2026 |
| USGS Mineral Commodity Summaries 2026: Zinc | report | 2026 |
| USGS Mineral Commodity Summaries 2026: Iron Ore | report | 2026 |
| About the 2025 List of Critical Minerals (USGS) | report | 2025 |
| 43 Material Complex Permeability vs. Frequency (CSV, Fair-Rite) | datasheet | 2020 |
Full record
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spore: profile
id: nickel-zinc-ferrite
spore_version: 0.2
family: ferrite
name: Nickel-zinc ferrite (Fair-Rite 43 Material, EMI suppression)
abbreviation: NiZn
role: EMI suppressor
category: shielding
type: spot-shields
summary: |
Fair-Rite 43 Material is a nickel-zinc spinel ferrite, a sintered ceramic, used to suppress conducted electromagnetic interference on cables and in high-frequency common-mode chokes. Fair-Rite gives an initial permeability of 800 and a Curie temperature above 130 °C for this grade, and its supplier safety data sheet gives a specific gravity of 4.8 g/cm3. No space-flight, radiation or vacuum data for this grade were found in the sources read for this profile.
best_for: Suppressing conducted EMI on cables and wiring from 20 MHz to 250 MHz
weakest_at: Permeability changes by 1.25 %/°C over 20 to 70 °C (datasheet), and no space test data were found
identity:
formula: Nickel-zinc spinel ferrite; nominal oxide composition 65 wt% Fe2O3, 21 wt% ZnO, 10 wt% NiO and 4 wt% CuO (Fair-Rite 43 Material Grade, RoHS composition sheet)
cas: 12645-50-0
source: fair-rite-43-sds
where: CAS Number printed in SDS section 1 (product code); material named as Nickel Zinc Spinel Ferrite in section 3
designations:
- system: Trade name
code: 43 Material
source: fair-rite-43-datasheet
where: 'Page title and heading: 43 Material Data Sheet'
tags:
environments: []
stresses: []
applications:
- electronics-and-chips
properties:
- benchmark: initial_permeability
label: Initial permeability (magnetic, dimensionless as printed)
value: 800
unit: '-'
scope: material
conditions:
field: B below 10 gauss
test: standard toroids 18/10/6 mm at 25 degC and 10 kHz unless otherwise indicated (data sheet footnote)
method: Value in the 43 Material characteristics table, measured by the manufacturer
status: ground
source: fair-rite-43-datasheet
where: 43 Material Characteristics table, row 'Initial Permeability @ B < 10 gauss'
- benchmark: flux_density_at_field
label: Flux density B at field strength H
value: 3500
unit: gauss
scope: material
conditions:
field_strength: 10 oersted
test: standard toroids 18/10/6 mm at 25 degC and 10 kHz unless otherwise indicated (data sheet footnote)
method: Value in the 43 Material characteristics table
status: ground
source: fair-rite-43-datasheet
where: 43 Material Characteristics table, row 'Flux Density @ Field Strength' (B 3500 gauss at H 10 oersted)
- benchmark: residual_flux_density
label: Residual flux density Br
value: 2200
unit: gauss
scope: material
conditions:
basis: value as printed; the table row gives no temperature or field beyond the table footnote (25 degC, standard toroid)
method: Value in the 43 Material characteristics table
status: ground
source: fair-rite-43-datasheet
where: 43 Material Characteristics table, row 'Residual Flux Density' (Br)
- benchmark: coercive_force
label: Coercive force Hc
value: 0.36
unit: oersted
scope: material
conditions:
basis: value as printed; the table row gives no temperature or field beyond the table footnote (25 degC, standard toroid)
method: Value in the 43 Material characteristics table
status: ground
source: fair-rite-43-datasheet
where: 43 Material Characteristics table, row 'Coercive Force' (Hc)
- benchmark: magnetic_loss_factor
label: Magnetic loss factor (tan delta / initial permeability)
value: 100
unit: 10^-6
scope: material
conditions:
frequency: 1.0 MHz
method: Value in the 43 Material characteristics table; printed as 100 at 1.0 MHz with the unit 10^-6 and MHz in the table
status: ground
note: The table prints the loss factor as tan delta over mu-i in units of 10^-6 at the frequency MHz. It is a magnetic loss factor, not the dielectric dissipation factor in the canonical list.
source: fair-rite-43-datasheet
where: 43 Material Characteristics table, row 'Loss Factor @ Frequency'
- benchmark: temperature_coefficient_permeability
label: Temperature coefficient of initial permeability
value: 1.25
unit: '%/°C'
scope: material
conditions:
temperature_range: 20 to 70 °C
method: Value in the 43 Material characteristics table
status: ground
source: fair-rite-43-datasheet
where: 43 Material Characteristics table, row 'Temperature Coefficient of Initial Permeability (20 -70°C)'
- benchmark: curie_temperature
label: Curie temperature
value: 130
bound: lower
unit: °C
scope: material
conditions:
basis: printed as '>130' in the table; the value is a lower bound, not a measured Curie point
method: Value in the 43 Material characteristics table
status: ground
source: fair-rite-43-datasheet
where: 43 Material Characteristics table, row 'Curie Temperature' (Tc)
- benchmark: conducted_emi_frequency_range
label: Frequency range for conducted EMI suppression
value: 20
value_high: 250
unit: MHz
scope: material
conditions:
application: suppression of conducted EMI on cables and wiring
method: Range stated in the 43 Material data sheet introduction
status: ground
source: fair-rite-43-datasheet
where: 43 Material Data Sheet, introduction paragraph ('suppression of conducted EMI from 20 MHz to 250 MHz')
- benchmark: boiling_point
label: Boiling point (upper bound, as printed in the SDS)
value: 2500
bound: upper
unit: °F
scope: material
conditions:
basis: printed as '< 2500 °F' in the SDS; an upper bound, not a measured boiling point
form: sintered component, 43 Material Grade
method: Value printed in the supplier SDS, section 9
status: ground
note: The SDS gives the boiling point only as an upper bound. No measured boiling point for this grade was found.
source: fair-rite-43-sds
where: Section 9, Physical and Chemical Properties, row 'Boiling Point'
- benchmark: complex_permeability_real_part
label: Real part of complex permeability at 1 MHz (CSV column headed µs', the leading Greek letter is garbled in the download)
value: 851.3550816
unit: '-'
scope: material
conditions:
frequency: 1000000 Hz (1 MHz)
equipment: named in the CSV header (HP4284A with 16047E fixture, and E4991A with 16454A fixture)
method: Value in the 43 Material complex permeability CSV, row Frequency(Hz) 1000000
status: ground
source: fair-rite-43-csv
where: 43-Material-publish.csv, row '1000000' (first data column after frequency)
- benchmark: complex_permeability_imaginary_part
label: Imaginary part of complex permeability at 1 MHz (CSV column headed µs'', the leading Greek letter is garbled in the download)
value: 48
unit: '-'
scope: material
conditions:
frequency: 1000000 Hz (1 MHz)
equipment: named in the CSV header (HP4284A with 16047E fixture, and E4991A with 16454A fixture)
method: Value in the 43 Material complex permeability CSV, row Frequency(Hz) 1000000
status: ground
source: fair-rite-43-csv
where: 43-Material-publish.csv, row '1000000' (second data column after frequency)
- benchmark: density
label: Specific gravity of the 43 Material Grade component (printed as specific gravity)
value: 4.8
unit: g/cm3
scope: material
conditions:
form: sintered component, 43 Material Grade
method: Value printed in the supplier SDS, section 9
status: ground
note: Fair-Rite's generic Ferrite Material Constants block on its toroid product page prints about 4.7 g/cm3 (specific gravity, approximately) and states those constants are typical for Fair-Rite MnZn and NiZn ferrites. That figure is not specific to the 43 grade, so it is not used here. The two figures are recorded side by side for the reader.
source: fair-rite-43-sds
where: Section 9, Physical and Chemical Properties, row 'Specific Gravity'
corrosion:
- environment: Water
headline: The supplier safety data sheet describes the sintered ferrite as insoluble in water and not reactive with water.
effect: The SDS lists solubility as insoluble and reactivity in water as none, and gives stability as stable and the material as inert. It gives no test data on humidity, ageing or chemical exposure.
rating: low
conditions:
material: 43 Material Grade sintered component
test: no test; supplier SDS statements only
source: fair-rite-43-sds
where: Section 9 (Solubility in Water; Reactivity in Water) and section 10 (Stability; Conditions to Avoid)
risks:
hazards:
- text: The supplier SDS lists no OSHA Hazard Communication classification and no physical or health hazards, marking each as N/A in section 2.
ghs: []
source: fair-rite-43-sds
where: Section 2, Hazard Identification
- text: The SDS lists the composition as nickel compounds below 23 wt%, copper compounds below 8 wt% and zinc compounds below 23 wt%, and lists these as EPCRA Section 313 chemicals.
ghs: []
source: fair-rite-43-sds
where: Section 3, Composition, and the Section 313 supplier notification
failure_risks:
- mode: Permeability drifts with temperature
trigger: Operation across 20 to 70 °C
consequence: Initial permeability changes by 1.25 %/°C over that range, so the initial permeability shifts with temperature.
severity: low
source: fair-rite-43-datasheet
where: 43 Material Characteristics table, temperature coefficient row
side_effects: []
handling:
- text: Wear safety glasses for eye protection (SDS section 8).
source: fair-rite-43-sds
where: Section 8, Eye Protection
- text: No respiratory protection or ventilation is required unless airborne dust is generated (SDS section 8).
source: fair-rite-43-sds
where: Section 8, Respiratory Protection and Ventilation
- text: Clean up spills by wiping off with a brush and cloth (SDS section 6).
source: fair-rite-43-sds
where: Section 6, Method for Cleaning up
- text: The SDS lists no precautions for handling and storage (SDS section 7).
source: fair-rite-43-sds
where: Section 7, Handling and Storage
mitigations: []
uses:
- application: electronics-and-chips
device: Cable EMI suppression cores and beads
example: Fair-Rite lists EMI suppression beads, beads on leads, round and flat cable EMI suppression cores and snap-on cores as products offered in 43 Material, for suppression of conducted EMI from 20 MHz to 250 MHz.
source: fair-rite-43-datasheet
where: 43 Material Data Sheet page, opening paragraph and the product list
- application: electronics-and-chips
device: High-frequency common-mode choke
example: The data sheet says 43 Material is also used for inductive applications such as high frequency common-mode chokes.
source: fair-rite-43-datasheet
where: 43 Material Data Sheet page, opening paragraph
supply:
- subject: Nickel
producers:
- country: Indonesia
share_percent: 66.7
year: 2025
- country: Philippines
share_percent: 6.9
year: 2025
- country: Russia
share_percent: 5.1
year: 2025
- country: Canada
share_percent: 3.6
year: 2025
critical_lists:
- list: USGS 2025 List of Critical Minerals (Nickel, used to make high-strength steel, and rechargeable batteries)
listed: true
recycling: 'USGS: nickel recovered from scrap accounted for approximately 60% of apparent consumption in 2025.'
substitutes: []
source: usgs-mcs2026-nickel
where: World Mine Production and Reserves table, 2025e (world total 3,900,000 t; shares calculated by Space Mushroom against that world total); Recycling paragraph
- subject: Zinc
producers:
- country: China
share_percent: 31.5
year: 2025
- country: Peru
share_percent: 11.5
year: 2025
- country: Australia
share_percent: 8.5
year: 2025
critical_lists:
- list: USGS 2025 List of Critical Minerals (Zinc, used as a coating to protect iron and steel from rust and corrosion)
listed: true
recycling: 'USGS: refined zinc produced in the United States was recovered from secondary materials at both primary and secondary smelters (no percentage given).'
substitutes: []
source: usgs-mcs2026-zinc
where: World Mine Production and Reserves table, 2025e (world total 13,000 thousand t; shares calculated by Space Mushroom against that world total); Recycling paragraph
- subject: Iron
producers:
- country: Australia
share_percent: 37.7
year: 2025
- country: Brazil
share_percent: 16.2
year: 2025
- country: India
share_percent: 11.9
year: 2025
- country: China
share_percent: 11.2
year: 2025
critical_lists:
- list: USGS 2025 List of Critical Minerals (iron is not a separate entry)
listed: false
recycling: 'USGS iron ore chapter: ''Recycling: None.'' It refers readers to the Iron and Steel Scrap chapter.'
substitutes: []
source: usgs-mcs2026-iron
where: World Mine Production table, usable ore, 2025e (world total 2,600,000 thousand t; shares calculated by Space Mushroom against that world total); Recycling line
media: []
documents:
- title: 'Safety Data Sheet: Soft Ferrite component, 43 Material Grade (Fair-Rite Products Corp.)'
type: sds
url: https://fair-rite.com/wp-content/uploads/2016/03/SDS-43-Component.pdf
year: 2015
- title: 43 Material Data Sheet (Fair-Rite)
type: datasheet
url: https://fair-rite.com/43-material-data-sheet/
year: 2026
- title: 43 Material Grade Nominal Chemical Composition, Fair-Rite P/N 5943000301 (RoHS sheet)
type: datasheet
url: https://www.fair-rite.com/wp-content/ebiz/newfair/rohs/5943000301%20ROHS.pdf
year: 2005
- title: 'USGS Mineral Commodity Summaries 2026: Nickel'
type: report
url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-nickel.pdf
year: 2026
- title: 'USGS Mineral Commodity Summaries 2026: Zinc'
type: report
url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-zinc.pdf
year: 2026
- title: 'USGS Mineral Commodity Summaries 2026: Iron Ore'
type: report
url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-iron-ore.pdf
year: 2026
- title: About the 2025 List of Critical Minerals (USGS)
type: report
url: https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals
year: 2025
- title: 43 Material Complex Permeability vs. Frequency (CSV, Fair-Rite)
type: datasheet
url: https://fair-rite.com/wp-content/uploads/2020/11/43-Material-publish.csv
year: 2020
gaps:
- 'Saturation flux density (Bs) for the 43 grade: not printed on the 43 data sheet; only B at 10 oersted and residual flux density are given.'
- 'Permeability versus frequency: only the 1 MHz row of the CSV (real and imaginary parts) is used as a property; the other rows are not profiled. Permeability versus temperature: no table or CSV for it was read.'
- Benchmark names conducted_emi_frequency_range, complex_permeability_real_part and complex_permeability_imaginary_part are not in spores/property-canon.yaml, and initial_permeability is not there either. Use the canonical names once they are added.
- 'Specific heat (0.25 cal/g/°C), thermal conductivity (3.5 to 4.5 mW/cm-°C), linear expansion (8 to 10 x 10^-6 /°C), tensile and compressive strength, Young''s modulus and Knoop hardness: printed only in Fair-Rite''s generic Ferrite Material Constants block, which says it is typical for MnZn and NiZn ferrites, so none is listed as a 43 property.'
- 'Operating and storage temperature for the 43 grade: Fair-Rite''s Storage and Operating Conditions page gives limits by component category, not by grade (for example -55 to +125 °C for inductive/power parts with no coatings or conductors), and does not name the 43 grade.'
- 'Behaviour above the Curie temperature (above 130 °C): no permeability-versus-temperature result in any source read for this profile, and the failure mode above Curie is not stated.'
- 'Electrical resistivity of the 43 grade: the data sheet prints 1×10^5 ohm-cm, but in superscript form that the automated value check could not match in the source text, so the value is not kept as a property here. Re-enter it once the printed form is confirmed.'
- 'Space environment: no vacuum, radiation, thermal-vacuum or flight result for NiZn ferrite cores found.'
- 'Humidity and ageing: no humidity, heat-ageing or long-term test found; corrosion entry rests only on the supplier SDS statements.'
- 'Crystal structure: the SDS names the material as a spinel ferrite, but no crystal-structure source was read, so no crystal system or space group is given.'
- Copper supply (CuO, 4 wt%) is not profiled in this file.
- 'Failure modes (cracking, mechanical breakage) and mitigations: no sourced statement found.'
- 'Comparison with MnZn ferrites: no MnZn grade was read in this run, so this profile does not compare the 43 grade with other ferrites in numbers.'
sources:
fair-rite-43-datasheet:
title: 43 Material Data Sheet (Fair-Rite Products Corp.)
id: Fair-Rite 43 Material characteristics table
url: https://fair-rite.com/43-material-data-sheet/
year: 2026
kind: datasheet
license: Manufacturer web page, cited not reproduced
fair-rite-43-sds:
title: 'Safety Data Sheet: Soft Ferrite component, 43 Material Grade (Fair-Rite Products Corp.)'
id: CAS 12645-50-0; prepared 05/20/2015 (SDS section 16)
url: https://fair-rite.com/wp-content/uploads/2016/03/SDS-43-Component.pdf
year: 2015
kind: datasheet
license: Supplier document, linked not reproduced
fair-rite-43-rohs:
title: 43 Material Grade Nominal Chemical Composition, Fair-Rite P/N 5943000301 (RoHS sheet)
id: Fair-Rite P/N 5943000301; RoHS conversion date 1/1/2005 printed on sheet
url: https://www.fair-rite.com/wp-content/ebiz/newfair/rohs/5943000301%20ROHS.pdf
year: 2005
kind: datasheet
license: Manufacturer document, linked not reproduced
fair-rite-43-csv:
title: 43 Material Complex Permeability vs. Frequency (CSV, Fair-Rite Products Corp.)
id: 43-Material-publish.csv; file header dated Feb-20
url: https://fair-rite.com/wp-content/uploads/2020/11/43-Material-publish.csv
year: 2020
kind: datasheet
license: Manufacturer data file, linked not reproduced
usgs-mcs2026-nickel:
title: 'Mineral Commodity Summaries 2026: Nickel'
id: USGS Mineral Commodity Summaries 2026
url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-nickel.pdf
year: 2026
kind: report
license: public domain (USGS)
usgs-mcs2026-zinc:
title: 'Mineral Commodity Summaries 2026: Zinc'
id: USGS Mineral Commodity Summaries 2026
url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-zinc.pdf
year: 2026
kind: report
license: public domain (USGS)
usgs-mcs2026-iron:
title: 'Mineral Commodity Summaries 2026: Iron Ore'
id: USGS Mineral Commodity Summaries 2026
url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-iron-ore.pdf
year: 2026
kind: report
license: public domain (USGS)
usgs-crit-2025:
title: About the 2025 List of Critical Minerals (USGS)
id: Final 2025 List of Critical Minerals
url: https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals
year: 2025
kind: web
license: public domain (USGS)
license: CC-BY-4.0
updated: '2026-11-01'
review:
status: draft
method: assistant
checked_values: 12
unreachable: 0
caveats: 2
note: Written by an AI assistant on 2026-11-01 from pages read in this run. 12 grade-specific values, 8 from the 43 data sheet and supplier SDS, plus the SDS boiling point (upper bound), the 20 to 250 MHz range from the data sheet, and the 1 MHz real and imaginary permeability from the 43 permeability CSV. The resistivity row stays out because its printed form (1×105) carries a lost superscript. Generic constants were left out. Density 4.8 g/cm3 (SDS) and about 4.7 g/cm3 (generic constants block) are recorded side by side.
story:
recipe:
line: Fair-Rite 43 Material is a nickel-zinc spinel ferrite. Its nominal composition is 65 wt% Fe2O3, 21 wt% ZnO, 10 wt% NiO and 4 wt% CuO, per Fair-Rite's RoHS composition sheet. The supplier SDS calls the part a sintered ceramic component.
parts:
- name: Iron oxide
symbol: Fe2O3
share_percent: 65
role: Main component by weight in the nominal composition.
- name: Zinc oxide
symbol: ZnO
share_percent: 21
role: Zinc component of the nominal composition.
- name: Nickel oxide
symbol: NiO
share_percent: 10
role: Nickel component of the nominal composition. The SDS names the material as nickel zinc spinel ferrite.
- name: Copper oxide
symbol: CuO
share_percent: 4
role: Minor component of the nominal composition.
risk_groups:
- title: For people
level: 0
verdict: Not classified hazardous by the supplier
lead: The supplier SDS lists no OSHA Hazard Communication classification and no physical or health hazard for the sintered component. Its toxicology and ecology entries are marked N/A.
points:
- label: The component
line: The SDS says the material is inert and insoluble in water, and lists no hazardous decomposition. It is a sintered ceramic part, not a powder.
- label: Composition
line: The SDS lists nickel compounds below 23 wt%, copper compounds below 8 wt% and zinc compounds below 23 wt%, and notes them as EPCRA Section 313 chemicals.
- label: Dust
line: Eye protection is safety glasses. Respiratory protection and ventilation are needed only where airborne dust is generated, per SDS section 8.
- title: In service
lead: The datasheet names cable EMI suppression and high-frequency common-mode chokes as uses of this grade.
points:
- label: Temperature
line: Initial permeability changes by 1.25 %/°C over 20 to 70 °C, per the 43 data sheet. The Curie temperature is printed as above 130 °C, and the sources read give no behaviour above that point.
- label: Storage
line: The SDS lists no precautions for handling and storage.
why: Fair-Rite 43 Material is a nickel-zinc spinel ferrite, a sintered ceramic core used to suppress conducted electromagnetic interference (EMI) on cables and in common-mode chokes. Fair-Rite describes it as its most popular ferrite for suppressing conducted EMI from 20 MHz to 250 MHz. The supplier data give it an initial permeability of 800 and a Curie temperature above 130 °C.
uses:
- where: Cable EMI suppression
line: Fair-Rite lists EMI suppression beads, beads on leads, round and flat cable EMI suppression cores and snap-on cores as products made in 43 Material, for suppression of conducted EMI from 20 MHz to 250 MHz.
- where: High-frequency common-mode chokes
line: The 43 data sheet says the grade is also used for inductive applications such as high frequency common-mode chokes.
- where: Electronics industry
line: The supplier SDS gives the product use as the electronics industry.
can_do:
- label: Initial permeability
benchmark: initial_permeability
value: '800'
line: Initial permeability is 800 for the 43 grade, measured on standard toroids at 25 degC and 10 kHz, per the Fair-Rite data sheet.
- label: Curie temperature
benchmark: curie_temperature
value: above 130 °C
line: The Curie temperature is printed as above 130 °C. The data sheet gives only the lower bound.
- label: Flux density
benchmark: flux_density_at_field
value: 3500 gauss
line: The data sheet prints a flux density of 3500 gauss at a field strength of 10 oersted for the 43 grade.
compare: The 43 grade is a nickel-zinc ferrite for EMI suppression from 20 MHz to 250 MHz, with initial permeability 800 and Curie temperature above 130 °C. No MnZn grade was read in this run, so this profile does not compare the 43 grade with other ferrites in numbers. The compare table lists the 43 grade's own values for the three main magnetic and physical figures.
compare_rows:
- label: Initial permeability
benchmark: initial_permeability
- label: Curie temperature
benchmark: curie_temperature
- label: Specific gravity
benchmark: density
handling:
- The sintered component is not classified as hazardous by the supplier SDS. Wear safety glasses.
- Respiratory protection is needed only where airborne dust is generated.
- Clean spills by wiping off with a brush and cloth.
- Allow for the stated temperature coefficient of permeability (1.25 %/°C over 20 to 70 °C) when designing for temperature change.
good_for:
- Suppressing conducted EMI on cables from 20 MHz to 250 MHz. The data sheet names this as its main use.
- High-frequency common-mode chokes, per the data sheet.
watch_out:
- Permeability changes by 1.25 %/°C over 20 to 70 °C.
- No flux density at saturation is printed for the 43 grade, and the magnetization curves were not read in this run.
- No space, vacuum or radiation test data were found for this grade.
verdict: The 43 grade has manufacturer data for its main magnetic figures and a supplier safety data sheet. Space-environment data are missing from every source read here.
References
Every number above carries a reference number. Click one to see the source and where in it the value comes from.
| # | Source | Type | Year | Used for |
|---|---|---|---|---|
| 43 Material Data Sheet (Fair-Rite Products Corp.) | datasheet | 2026 | 11 values | |
| Safety Data Sheet: Soft Ferrite component, 43 Material Grade (Fair-Rite Products Corp.) | datasheet | 2015 | 10 values | |
| 43 Material Grade Nominal Chemical Composition, Fair-Rite P/N 5943000301 (RoHS sheet) | datasheet | 2005 | 0 values | |
| 43 Material Complex Permeability vs. Frequency (CSV, Fair-Rite Products Corp.) | datasheet | 2020 | 2 values | |
| Mineral Commodity Summaries 2026: Nickel | report | 2026 | 1 value | |
| Mineral Commodity Summaries 2026: Zinc | report | 2026 | 1 value | |
| Mineral Commodity Summaries 2026: Iron Ore | report | 2026 | 1 value | |
| About the 2025 List of Critical Minerals (USGS) | web | 2025 | 0 values |
Updated