Introduction to DC Power Filter Circuit: The circuit consists of three parts: a primary LC filter circuit, a common-mode filter, and a secondary LC filter circuit. LC filters, also known as passive filters, are traditional DC power harmonic compensation devices composed of inductors and capacitors. They help reduce harmonics in the power supply and improve DC power quality. Common-mode filtering helps suppress fast transient group pulse interference with repetition frequencies in the kilohertz range, commonly found in industrial environments. PCB specification: FR4, 42 × 77 × 1.6 mm. Designed with short traces for high-current paths to improve current handling and reduce external interference. Inductors rated for 20 A. Features: 1. Compact design 2. Reliable performance 3. Low power loss 4. Broad application compatibility 5. Optimized trace layout for high-current paths Specifications: Input: DC ≤ 50 V (electrolytic capacitors may be replaced 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 (EMI) in DC power supplies and is suitable for use in automotive, motorcycle, and other industrial DC applications with high EMI levels. Note: Appearance or color of components may vary between production batches.