SIRIUS coupling contactor, Size S00 — 24 V DC, 10 A switching
The Siemens SIRIUS 3RT2015-2JB41-ZX95 is a Size S00 coupling contactor designed for switching loads in control circuits, with a 24 V DC coil rated to switch 10 A at 24 V. This is a coupling contactor — meaning it's intended for signal-level switching between control systems or for isolating low-power DC loads, not for direct motor starting. The spring-type terminals on the coil accept solid or stranded conductors from 0.5 to 4 mm², and the main contact set is rated for 20 to 12 A depending on utilization category.
The 45 mm width, 70 mm height, and 73 mm depth make this a compact component for crowded DIN-rail enclosures.
Switching frequency by duty class
The contactor's maximum switching frequency varies by load type: 1,000 operations per hour at AC-1 (resistive), 750/h at AC-2 and AC-3 (motor starting/running), 750/h at AC-3e, and 250/h at AC-4 (plugging/inching). The mechanical life is typical at 30,000,000 operations.
Environmental and operating limits
The coil's initial pull-in value is 0.7 of rated voltage, and the full-scale value is 1.25 — meaning the coil holds in reliably at 70% of nominal and can tolerate 125% without damage. No auxiliary switch is fitted; this is a bare contactor for integration into a larger control scheme.