Backed by SINOSTEEL Group

Leading Manufacturer of Soft Ferrite Cores & Magnetic Materials

Engineered for high-frequency power electronics, EV & new energy, and 5G telecommunications. OEM/ODM, global export.

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Mn-Zn Ferrite Ni-Zn Ferrite EV / New Energy EMI Filter 5G / Telecom
ISO 9001
Certified
IATF 16949
Compliant
RoHS / REACH
Compliant
Global Export
50+ Countries

Find Your Ferrite Core

Search by material formulation, core geometry, or target application — three dimensions to reach your exact specification.

By Material

Filter by magnetic formulation

Ni-Zn Ferrite 0 series → Mn-Zn Soft Ferrite 4 series →
Browse All Materials →

By Core Shape

EE, EER, PQ, RM, Toroid & more

EER Cores 39 sizes → E/EE Cores 0 sizes → EI Cores 0 sizes → RM Cores 0 sizes → EP Cores 0 sizes → PM Cores 0 sizes →
View Core Geometry Library →

By Application

Match your engineering scenario

EV & New Energy OBC / PV → Automotive Electronics AEC-Q200 → Telecom & 5G Base Stations → EMI / RFI Filters CMC → Industrial Power SMPS / PFC →
Custom Application Support →

Production Capability & Factory Strength

Behind every specification sheet is real infrastructure. Here is what JSF Magnetics brings to your supply chain.

0
m² Factory Floor
80,000 m² production base
0
Tons / Year
Annual production capacity
15
Days Lead Time
Standard order delivery
Custom Tooling
OEM/ODM new shape support
State-of-the-art CNC Grinding
Precision air-gap control ±3% AL tolerance
Full R&D Lab In-House
Pv, B-H testing at -40°C to +150°C
SINOSTEEL Supply Chain
Vertically integrated raw material sourcing

Featured Soft Ferrite Materials

Explore our most specified and highest-volume material grades favored by global electronics buyers.

6H10 MnZn Ferrite

6H MnZn …

High-performance soft ferrite material tailored for specific industry power applications.

Initial Permea… 2500.00
Relative loss … 5.00 ×10^-6
Low Pc Trans and choke for switching power supply
Data Sheet → Quote

6H20 MnZn Ferrite

6H MnZn …

Standard materials: 6 H series 6H series are JSF's standard power material  with  lo…

Initial Permea… 2300.00
Saturation Flu… 510.00 mT(1000A/m)
Low Pc Trans and choke for switching power supply
Data Sheet → Quote

6H40 MnZn Ferrite

6H MnZn …

Standard materials: 6 H series 6H series are JSF's standard power material  with  lo…

Initial Permea… 2400.00
Relative loss … 3.00 ×10^-6
Low Pc DC-DC Converter
Data Sheet → Quote

6H41 MnZn Ferrite

6H MnZn …

Standard materials: 6 H series 6H series are JSF's standard power material  with  lo…

Initial Permea… 2500.00
Relative loss … 3.00 ×10^-6
High Bs High μ DC-DC Converter
Data Sheet → Quote

6H42 MnZn Ferrite

6H MnZn …

Standard materials: 6 H series 6H series are JSF's standard power material  with  lo…

Initial Permea… 3400.00
Relative loss … 3.00 ×10^-6
High B Low Power Loss Choke
Data Sheet → Quote

6H45 MnZn Ferrite

6H MnZn …

Standard materials: 6 H series 6H series are JSF's standard power material  with  lo…

Initial Permea… 2400.00
Relative loss … 3.00 ×10^-6
Low Freq Low Pc DC-AC Inverter
Data Sheet → Quote
Browse All Product Series →
Engineering Case Studies

Real-World Application Solutions

How leading OEMs and Tier-1 suppliers use JSF Magnetics materials to meet their toughest design requirements.

EV & New Energy

EV On-Board Charger Main Transformer

Challenge: 11kW OBC operating at 100kHz, required core loss <400 kW/m³ at 100°C operating temperature.
Solution: JSF 6H45 Mn-Zn material in EER 49/10/30 shape.

Low Pc @ 100kHz High Bs AEC-Q200
View EV Solutions →
5G Telecom

5G Base Station High-Frequency SMPS

Challenge: 500W server PSU at 500kHz, operation up to 85°C ambient.
Solution: JSF 7H10 high-frequency Mn-Zn in PQ 35/35.

Ultra Low Pc High Freq PQ Core
View Telecom Solutions →
EMI / EMC

Common Mode Choke for Industrial Inverter

Challenge: 30A common mode choke, CM impedance >2000Ω at 1MHz, Class B conducted EMI.
Solution: JSF Ni-Zn high-permeability material in toroidal form.

High μi Ni-Zn Toroid
View EMI Solutions →
Enterprise Compliance

Built for Tier-1 Supplier Qualification

Large automotive and renewable energy OEMs operate strict first-pass supplier screening systems. JSF Magnetics maintains a full compliance stack to clear automated procurement gates and enter approved vendor lists.

View Compliance Center →
ISO 9001
Quality Management
IATF 16949
Automotive Quality
RoHS 3.0
Hazardous Substance Free
REACH
Chemical Compliance
Halogen-Free
IEC 61249-2-21
SGS / UL
Third-Party Tested

Ready to optimize your magnetic components?

Get a custom engineering quote within 24 hours. Tell us your application and target frequency — our R&D team will recommend the optimal grade.

Request a Quote Browse All Materials

24-hour response commitment · English / Chinese technical support · sales@jsf-magnetics.com