SIRIUS S00 power contactor — 24 VDC coil, 10 A rated
The Siemens 3RT2016-2BB41-ZX95 is a SIRIUS-brand power contactor in size S00, designed for switching motor loads and resistive loads in control panels. Its 24 VDC coil draws 10 A at rated value, and the main contacts are rated for 20 to 12 A (the range suggests a minimum switching current of 20 A and a maximum of 12 A — verify against your specific load curve). The coil connection uses spring-type terminals, which speed wiring in panel assembly compared to screw terminals.
Mounting and integration
Fastens via screw or snap-on onto 35 mm standard mounting rail per DIN EN 60715. The mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/-22.5° — useful when fitting into a crowded enclosure. Clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. Panel builders should account for these gaps to maintain arc-flash clearance and cooling airflow around the contactor.
Switching frequency and duty class
Maximum switching frequency varies by duty: 1,000 operations/hour at AC-1 (resistive loads), 750 ops/h at AC-2 and AC-3 (motor starting/running), and 250 ops/h at AC-4 (plugging/inching). The AC-3e rating also caps at 750 ops/h. For high-cycle applications like conveyor indexing, stay within the AC-3 limit; for frequent reversing, the AC-4 derating applies. Arcing time is 10 to 15 ms, and the DC coil dropout time is 7 to 13 ms — relevant for coordinating with downstream safety circuits.