SIRIUS Size S0 Contactor with 24 VDC Coil
It is rated for a 24 VDC coil with a ring cable lug connection, and it carries an auxiliary switch block integrated into the assembly. The contactor mounts via screw or snap-on onto a 35 mm standard mounting rail per DIN EN 60715, and the mounting position allows +/-180° rotation on a vertical surface with +/-22.5° tilt forward and backward. This flexibility simplifies panel layout when space is tight. Physical envelope is 91 mm high, 45 mm wide, and 107 mm deep — the Size S0 footprint that drops into standard panel cutouts.
The auxiliary contacts are rated for DC switching at various voltages: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 2 A at 500 V. At 400 V DC the rating is 3 A, and at 480 V DC it is 34 A — the 480 V figure is the highest DC current rating on the auxiliary side, so it is the one to check for high-voltage DC control circuits. Motor load capability is expressed as 5 hp at 230 V, which gives a quick cross-check against standard North American motor frames. The contactor is rated for 750 switching operations per hour under AC-1, AC-2, AC-3, and AC-3e duty, and 250 operations per hour under AC-4 — the AC-4 figure is the one that governs heavy inrush or plugging applications. The inrush current peak is 3 A at coil pick-up, which is modest enough that most 24 VDC power supplies handle it without derating.
Environmental and Timing Specifications
The DC coil operates at 24 V nominal with a rated value of 24 V and an initial value factor of 0.7, meaning the coil must see at least 16.8 V to pull in reliably. Timing is tight: the DC operate time is 30 to 50 ms, and arcing time is 10 ms. These numbers matter when coordinating with upstream protection devices or sequencing multiple contactors in a motor control center.
Because it is a current-production Siemens SIRIUS part, lead times are predictable through the authorized channel, and the ring cable lug coil connection is a standard variant that does not require special factory programming.