The Siemens 3RH1431-1BE40 is a SIRIUS auxiliary contactor in size S00, carrying three normally open instantaneous contacts and a 60 V DC coil. It is rated for 10 A at 24 V and 10 A in AC-12 duty, with a contact reliability of one incorrect switching operation per 100 million operations at 17 V, 1 mA.
Mounts via screw or snap-on onto a DIN rail; the size S00 footprint is 90 mm wide by 57.5 mm high by 72 mm deep. Front protection is IP20 — suitable for enclosed panels but not for washdown areas.
Duty and environmental ratings
Shock resistance is 10g for 5 ms and 5g for 10 ms. Surge voltage withstand is 6 kV. The typical mechanical life is 5 million operations.
Current ratings across voltages
The contact ratings vary by voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V, and 1 A at 110 V, with 0.27 A at 220 V. These are the make/break capacities for the auxiliary contacts — derate accordingly when switching multiple loads or at elevated ambient temperatures.