DC Power Filter Circuit Description: This circuit consists of three main sections: a primary LC filter, a common-mode EMI filter, and a secondary LC filter. The LC filter—also known as a passive filter—is a traditional DC power filtering solution composed of inductors and capacitors. It effectively attenuates harmonics in the DC power supply, improving power quality. The common-mode EMI filter helps suppress fast transient burst interference, commonly found in environments with high-frequency noise sources. PCB Specification: FR4 material, 42 × 77 × 1.6 mm, double-sided construction. Optimized layout with short trace lengths for high-current paths to enhance current handling capability and reduce electromagnetic interference. Inductors: Rated for 20 A continuous current. Key Features: 1. Compact and lightweight design 2. Stable and reliable performance 3. Low power loss 4. Broad application compatibility 5. Optimized high-current trace routing Specifications: Input Voltage: DC ≤ 50 V (electrolytic capacitors may be upgraded for higher voltage operation) Output: DC Rated Current: 20 A PCB: Double-sided FR4 fiberglass board Electrolytic Capacitors: 50 V, 470 µF — 2 pcs Film Capacitors: 100 nF — 2 pcs; 470 pF — 1 pc Magnetic Ring Inductors: 2 pcs (iron-silicon-aluminum core, rated for 20 A) Common-Mode Inductor: 1 pc (flat copper winding, rated for 20 A) Terminals: 7.62 mm pitch, 2-pin and 3-pin connectors — 1 pc each This module is designed to reduce electromagnetic interference in DC power systems and is suitable for use in automotive, motorcycle, and other industrial DC applications with demanding EMI environments.