Emi Filter

Filtered results from JSF Magnetics’ full product catalog. ✕ Clear filter

Browse All Series →
SINOSTEEL
Group Member
ISO 9001
Certified
Global Export
to 50+ Countries
Custom Engineering
Support
🔎 Filtered: Emi Filter (1 material grades found) ✕ Clear

6H42 MnZn Ferrite

6H MnZn Ferrite

Standard materials: 6 H series 6H series are JSF's standard power material  with  low  core loss and high  saturation  flux density,  and are suitable for wide range of transformers and choke coils for switching power supply.6H20 is standard material with superior characteristics and high performance-cost ratio. 6Hl O has higher permeability than 6H20 in room temperature, and is suitable for switch-mode transformers and chokes with working frequency below 100kHz. Additionally, HJS has developed new materials with lower core loss and higher magnetic flux density, which satisfies latest requirements of digital and mobile electronics.Core loss of new 6H40 material is around 25% lower than that of standard 6H20, and is suitable for transfomers and choke coils for flat, low profile power supplies and AC/DC adaptors of electronic equipments (such as notebook PC), which strictly require low temperature rise. For transformers and choke coils of mobile electronic equipments, JSF has developed 6H41 material (bottom temperature of core loss curve 80°C) and 6H42(bottom temperature 50°C), which enables low operation temperature of transformers while reducing the volume of transformers and improving the efficiency of transformers. What's more, 6H45 material with core loss 10% lower than that of 6H40 is also in lineup  of HJS.

High B Low Power Loss Choke Transformer
Initial Permeabil…
3400.00
Relative loss fac…
3.00 ×10^-6
Saturation Flux D…
530.00 mT(1000A/m)
Saturation Flux D…
430.00 mT(1000A/m)
Data Sheet Request Quote

Search by Core Geometries

Already know the physical dimensions you need? All our ferrite materials can be pressed and ground into standard industry geometries, including EE, EI, PQ, RM, ETD, and Toroid cores.

Browse Core Shape Library →

Not sure which ferrite material fits your project?

Download our 2026 Soft Ferrite Core Selection Guide tailored for electrical engineers, or consult with our R&D specialists directly.

🔒 Your data is secure. We never spam.

Frequently Asked Questions

Expert answers to common engineering queries regarding soft ferrite materials.

Mn-Zn (Manganese-Zinc) ferrites are generally used for lower frequency applications (typically under 1 MHz) where high initial permeability and high saturation flux density are strictly required, such as in SMPS transformers and broadband communications. Conversely, Ni-Zn (Nickel-Zinc) ferrites exhibit much higher electrical resistivity, making them the optimal choice for high-frequency interference suppression and RF applications up to hundreds of MHz.

Selection heavily depends on your target operating frequency and temperature. For frequencies between 100kHz and 500kHz, our 6H40 or 6H45 materials offer excellent balance between high saturation and low core loss. If your design pushes above 500kHz up to 1MHz+, specialized materials like 7H series are necessary to mitigate rapid temperature increases caused by high-frequency power losses.

Yes, absolutely. As an ISO 9001 certified OEM/ODM manufacturer under the SINOSTEEL group, we support massive custom engineering. We can modify standard EE, ER, or PQ geometries, grind precision air gaps (AL value matching), or tool entirely new custom shapes directly derived from your CAD drawings. Please consult with our engineers for minimum order quantities (MOQ) and tooling lead times.