It can be used to increase maximal load of controller transistor output line and for galvanic isolation between output line and load point; Number of relay outputs: 1 ; Power supply: 5 ... 9 V DC ; Relay maximal load: 5 A (max), 30 V DC / 50 V AC ; Output: NO ; Main features: Screw mounting with spacers, Protections : Overvoltage, Reverse polarity connection ;