Compact Through-Hole Ferrite Common Mode Choke 20mH 0.5A | Mn-Zn Core | Magnetic components | Transformer, Inductor, Choke Manufacturer | Coilmaster Electronics

In low-power circuits where EMI compliance is critical, high-inductance ferrite chokes are often required to suppress conducted noise at lower frequencies. Our 20mH / 0.5A Mn-Zn common mode choke in a compact through-hole design is ideal for smart meters, precision control electronics, and compact consumer power adapters, ensuring stable performance without adding excessive size or cost.

With its 20mH inductance and 0.5A rated current, this choke provides strong low-frequency attenuation, making it especially effective in applications where sensitive electronics must pass stringent EMC testing. The Mn-Zn ferrite core is carefully sourced from qualified suppliers to maintain parameter consistency, avoiding variation that can compromise filter effectiveness. Each unit undergoes 100% Hipot and electrical testing, guaranteeing insulation reliability and long-term operational stability.

To achieve consistent quality, the choke is manufactured using automated winding equipment for precise coil geometry, while copper wire from leading global suppliers ensures durable insulation and minimizes the risk of failure under extended high-temperature conditions. For engineers with unique system requirements, we also offer customizable inductance, impedance peak tuning, and parameter adjustments, with sample lead times as short as 1–2 weeks. Coilmaster Electronics is a high-current Compact Through-Hole Ferrite Common Mode Choke 20mH 0.5A | Mn-Zn Core, High inductance EMI choke for precision electronics, smart meters, and low-power adapters 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.