Auxiliary contactor for control-circuit switching
It carries a rated operating current of 10 A at 24 V under AC-12 duty (resistive loads), with a maximum switching voltage of 240 V at 50/60 Hz. The contact arrangement provides 2 normally-open and 2 normally-closed instantaneous contacts — no delayed or make-before-break switching — so it's a straight signal repeater for PLC outputs or pushbutton circuits. The IP20 front protection means it's suitable for enclosed panels where no washdown or dust ingress is expected.
Current ratings across the voltage range
The 3RH1122-1AU00's switching capacity varies with voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. At 110 V it's rated 1 A, at 220 V it drops to 0.27 A — these lower figures reflect the contact gap's ability to extinguish the arc at higher voltages. For a tire-curing press environment where control circuits run at 24 VDC or 230 VAC, the 10 A or 6 A rating respectively gives enough headroom for multiple solenoid valves or indicator lamps without paralleling contacts.
Mechanical endurance and environmental limits
Shock resistance is specified at 10g / 5 ms and 5g / 10 ms, which handles vibration from nearby motor starters or conveyor drives.