Part identity and ratings
The Siemens 3RH1344-1AF00 is a SIRIUS auxiliary contactor, size S00, with 4 normally-open instantaneous contacts and no auxiliary switch, delayed, lagging, or make-before-break switching. It is rated for AC-12 duty at 10 A maximum operating current, which covers resistive and solid-state load switching typical in control circuits. Rated operational currents at AC-15 (inductive loads with transformers) are 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. At 24 V it carries 10 A, at 110 V it carries 1 A, and at 220 V it carries 0.27 A. This means the contactor handles typical pilot-duty and signal-level switching across common control voltages.
Wire cross-sections accepted: 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), and 2x 4 mm² solid. This covers standard control wiring from signal-level to moderate power feeds without needing terminal adapters.
Shock resistance is 10g at 5 ms and 5g at 10 ms. Maximum operating altitude is 2000 m.