Siemens 3RT2028-1AL20 Power Contactor

Manufacturer: SIEMENS
Type: Power Contactor
Model: 3RT2028-1AL20 

size of contactor: S0
power loss [W] for rated value of the current:
 at AC in hot operating state 9.6 W
 at AC in hot operating state per pole 3.2 W
 without load current share typical 10.5 W
insulation voltage:
 of main circuit with degree of pollution 3 rated value 690 V
 of auxiliary circuit with degree of pollution 3 rated value 690 V
Rated Operational Voltage:  230 V AC, 50/60 Hz
Ambient temperature, during operation: -25 … +60 °C
number of poles for main current circuit: 3
Auxiliary Contacts: : 1 NO + 1 NC