AC 110V 220V -surge protection+three-level filter Input voltage: single-phase AC 110-250V Output voltage: single-phase AC 110-250V Load rated current: 20A Input port: three wire 7.62 Socket input/output port: three wire 7.62 Socket output Function: -protection (triple surge protection, overvoltage protection) One set of differential mode+two sets of common mode bidirectional filtering to prevent interference, prolong the service life of electrical appliances, and increase equipment stability Design features: 1) Triple surge protection circuit is used to prevent -strikes and surges. The -surge protection circuit adopts the classic design of three varistors and two discharge tubes. The varistors and discharge tubes are used in series. When there is no surge, the discharge tube is open. When the surge voltage comes, the discharge tube discharges and shortcircuits, and the varistors absorb the surge voltage, effectively solving the problem of leakage of the varistors and the safety hazards of overheating and fire of the varistors, greatly extending the service life of the entire surge protection circuit. 2) A set of differential mode+2 sets of common mode filtering, due to the use of three-stage (also known as three-stage) filtering, the filtering effect of noise is better. It can effectively suppress the problem of rapid transient group pulse interference with a repetition frequency of several thousand hertz in certain user sites. Selection of main components for circuit boards: X2 capacitor: 0.47UF 2PCS Y2 capacitor: 275V 3300PF 2PCS differential mode inductor: 2PCS Common mode inductance: 2 PCS Varistor: 20D561K 3PCS Ceramic Discharge Tube: 2PCS Color: As Shown Material: PCB+Electronic Components Specifications: No Shell Package Contents: 1 x AC Power Filtering Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.