4mH 2A Mn-Zn Common Mode Choke | Low-Frequency Optimized Ferrite Filter | Magnetic components | Transformer, Inductor, Choke Manufacturer | Coilmaster Electronics

When applications require stronger EMI suppression at lower frequencies, higher inductance ferrite chokes provide the necessary performance margin. Our 4mH / 2A Mn-Zn common mode choke in a compact through-hole package is designed for home appliances, industrial electronics, and small power converters, delivering effective suppression where low-frequency conducted noise is most critical.

Compared with 2mH versions, this 4mH choke offers doubled inductance while maintaining a 2A rated current. By optimizing the ferrite core, the impedance peak is shifted toward lower frequencies, providing better attenuation in the 100kHz–500kHz range. This makes it ideal for designs using switching controllers, inverter-fed appliances, or industrial control boards where low-frequency EMI compliance is challenging. Every unit is fully verified with 100% Hipot and electrical characteristic testing, ensuring reliable insulation and consistent inductance across production batches.

For manufacturing reliability, we utilize automated winding equipment to ensure consistent coil geometry, while high-quality copper wire sourced from leading global suppliers guarantees insulation durability under continuous operation. Customers also have the flexibility to request customized inductance, impedance tuning, or parameter adjustments, with prototype samples available within short lead times to accelerate design validation.

For engineers targeting low-frequency EMI compliance without sacrificing current capability, our 4mH / 2A Mn-Zn ferrite choke delivers a cost-effective and reliable filtering solution. Please contact us through the inquiry form on our website, and our team will provide tailored recommendations for your project. Coilmaster Electronics is a high-current 4mH 2A Mn-Zn Common Mode Choke | Low-Frequency Optimized Ferrite Filter, Enhanced attenuation for low-frequency EMI in home appliances and industrial electronics manufacturer from Taiwan since 1995. Coilmaster offers AEC-Q200 certified, high-efficiency power inductors, chokes, and transformers. Specializing in low-loss, high-current components for Automotive, 5G, and Industrial applications. Contact our experts for instant support. With more than 20 years of experience in magnetic territory, Coilmaster Electronics is specialized in the production of SMD power inductors, common mode choke, high frequency transformers.