SIRIUS thermal overload relay, Size S0, CLASS 10 — 3RU1126-1DB0-ZX95
Mounts directly to a Siemens contactor via the contactor mounting fastening method, saving DIN-rail space and reducing wiring. The relay accepts screw-type terminals for both main and auxiliary circuits, with solid and stranded wire ranges from 0.5 to 2.5 mm² (AWG 20 to 14 for aux, AWG 16 to 8 for main). Rated for 3-pole main current circuits, the relay dissipates 1.9 W per pole under load. Control circuit consumption is 1 A at 24 V, 3 A at 120 V, and 2 A at 230 V — figures that matter when sizing the control transformer or power supply feeding the contactor coil.
Dimensions are 45 mm wide, 97 mm high, and 96 mm deep — a compact S0 footprint that fits standard 45 mm modular enclosure slots. Clearance requirements are minimal: 0 mm upwards, forwards, backwards, and downwards, with only 6 mm needed at the side. This zero-clearance design allows dense packing of contactor-relay pairs on a DIN rail without derating for airflow.
The relay withstands 100% relative humidity during operation, suitable for unconditioned plant-floor environments. Shock resistance is rated at 8g for 10 ms. Carries DMT 98 ATEX G 001 certification for use in potentially explosive gas atmospheres, and surge voltage resistance rated at 6 kV. Substance prohibitance date of 07/01/2006 aligns with RoHS compliance.