Siemens 3RH1344-1DF40-0KA0 — SIRIUS Auxiliary Contactor, 110 V DC Coil, 4 NO
It carries 4 instantaneous normally-open contacts rated at 10 A at 24 V, 6 A at 230 V, and 1 A at 690 V — so it handles 24 VDC PLC outputs and 230 VAC pilot duty on the same block. The 110 V DC coil draws 3.2 W closing and holding, with pickup at 0.8x rated and dropout at 1.1x rated.
Contact Ratings and Duty
The four NO contacts are rated for inductive and resistive loads across common control voltages: 10 A at 24 V (DC-13 typical for solenoid valves and contactor coils), 6 A at 230 V (AC-15 pilot duty), 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V.
Shock resistance is 10g for 5 ms and 5g for 10 ms. The varistor surge suppressor is built in across the coil, rated for 6 kV surge voltage — no external suppression needed for most 110 V DC circuits.