SIRIUS 3RH1344-1DB40-0KA0 — Auxiliary Contactor, 24 V DC, 4 NO
Its 24 V DC coil draws 3.2 W for both closing and holding, with an integrated varistor surge suppressor across the coil terminals — no external suppression diode needed for DC switching, which simplifies panel wiring and BOM count. The contact block provides four normally open (NO) instantaneous contacts rated for operational currents that vary with voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. Mechanical endurance is rated at 10 million operating cycles, with contact reliability specified as one incorrect switching operation per 100 million operations at 17 V, 1 mA.
The 45 mm width (3 SBE — 3 standard width units) fits standard S00 contactor spacing. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, giving flexibility in tight enclosures.
Terminal Wiring and Environmental Limits
Solid conductor cross-sections accepted: 2x 0.5…1.5 mm², 2x 0.75…2.5 mm², and 2x 4 mm². Operating temperature range is -25 to +60 °C; storage and transport range is -55 to +80 °C. Shock resistance is 10g / 5 ms and 5g / 10 ms.