Introduction to DC Power Filter Circuit: The circuit consists of three parts: a primary LC filter circuit, a common-mode EMI filter, and a secondary LC filter circuit. LC filters, also known as passive filters, are traditional DC power filtering devices composed of inductors and capacitors. They help reduce harmonics in the DC power supply and improve power quality. Common-mode filtering helps suppress fast transient burst interference, commonly found in environments with high-frequency noise. PCB specification: FR4, 42 × 77 × 1.6 mm. Optimized layout with short trace lengths for high-current paths to enhance 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 range 5. Optimized high-current trace layout Input voltage: DC up to 50 V (electrolytic capacitors may be replaced for higher-voltage operation) Output: DC Rated current: 20 A Circuit board: Double-sided FR4 fiberglass PCB 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) Connectors: 7.62 mm pitch, 2-pin, 3-pin — 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. Material: PCB + electronic components Color: Yellow Package Includes: 1 × DC Power Filter Note: Due to manufacturing variations, component appearance or color may differ slightly between batches. Functionality remains unchanged. Note: Screen settings and lighting conditions may cause slight color variation between product images and the actual item. Measurement tolerance: ±1–3 cm.