Siemens 3RS20 40-2GW50 Temperature Monitoring Relay, Cage Clamp Terminal, Digital Setting, 2 Threashold Values, 45mm Width, 1 CO + 1 CO + 1 NO Contact Type, (-)50-932 Degrees Celsius Measuring Range, 24-240VAC/VDC Control Supply Voltage at 50-60Hz
The semiconductor contactors are selected on the basis of details of the power system, the load and the ambient conditions. As the semiconductor contactors are already equipped with an optimally matched heat sink, the selection process is considerably simpler than that for semiconductor relays.