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.
What the ratings mean for panel integration
The 45 mm width, 70 mm height, and 73 mm depth make this a compact component for crowded DIN-rail enclosures. It fastens via screw and snap-on mounting onto 35 mm standard mounting rail per DIN EN 60715 — the standard for industrial control panels. The mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/-22.5°, giving flexibility for tight layouts. Clearance requirements are modest: 10 mm upwards, forwards, and downwards, and 6 mm at the side.
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). For DC switching, the arcing time is 10 to 15 ms with an operate time of 38 to 65 ms at DC. The mechanical life is typical at 30,000,000 operations.
Environmental and operating limits
Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. 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.