Contact ratings and switching capacity
The 3RH2122-1BF40-1AA0: This contactor carries 2 normally open instantaneous contacts, rated for switching across a wide voltage range. Higher voltages like 690 V still allow 1 A, making it suitable for mixed-voltage control circuits. Coil is 110 V AC rated, with a closing power draw of 4 W DC and the same holding power.
