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Features:Using FR-4 double-sided circuit boards.5A high quality solid state relay.Input and output are using KF128-3.81 Terminal Block wiring more convenient.Use SS8050 1.5A high current transistor for switching transistor quality is more stable.LED indication on switch with relay.Specifications:Type: 1-channel / 2-channel / 4-channel(Optional)Power Supply: 3-32V DC (Wide Voltage Power Supply)Trigger: High Level Trigger 3-32V DC Relay Switches On (ON) 0-0.5V Relay is Switched Off (OFF).Load Current: 5-220V DC 5A (DC only)*Wiring Port Description:DC +: positive power supply (3-32V DC)DC-: negativeCH1.CH2: trigger terminal (3-32V DC high level trigger active)*Item Size:1-channel: 68 * 23 * 23mm2-channel: 68 * 46 * 23mm4-channel: 68 * 68 * 23mm*Item Weight:1-channel: 27g / 0.95oz2-channel: 52g / 1.84oz4-channel: 101g / 3.58ozPackage List:1 * Relay Module