CB Siemens 3RV1021-4BA15温控器，20A，（14~20A），3P 7.5kW电机，1NO + 1 NC

Overload protection for three-phase motors
Size: S0
Three-phase motor: 7.5kW
Current ratings: 20A
Solution to adjust the line: 14A ~ 20A
Interrupt short circuit: 260A
Short circuit current at 400VAC: 50KA
Auxiliary contacts: 1N0 + 1NC
Origin: Germany