Advantages: High-impedance controller pin; Pull-down circuit for the avoidance of malfunction; One normally closed contact and one normally open contact; Triode drive, increasing relay coil; Power supply indicator lamp; Control indicator lamp; With 4 fixed screw holes, a hole diameter of 3.1mm, convenient installation, and fixationOperating Voltage: 4.5 ~ 5VDC; No of Channel: 1Switching Voltage: 250VAC@30A; Switching Voltage: 30VDC@30ATrigger voltage:- High Selection: ON: 3 ~ 5VDC; OFF: 0 ~ 1.2VDC ;;; Low Selection: ON: 0 ~ 4V; OFF: 4 ~ 5VHigh-impedance controller pinPull-down circuit for the avoidance of malfunctionOne normally closed contact and one normally open contactTriode drive, increasing relay coilOutput Connector: With Flip CoverDimension: Length: 73 mm; Width: 43 mm ; Height: 25mm; Weight: 30 gm