Siemens 3RT2015-1FB41-ZW96 SIRIUS Power Contactor, 24 VDC Co

The coil is rated at 24 VDC nominal, with a pickup threshold of 0.8 times rated and a dropout at 1.1 times rated — meaning it pulls in reliably at about 19.2 V and drops out above 26.4 V. That's a standard control voltage for most PLC-driven panels, so you won't need a separate power supply for the coil. For the main contacts, the contactor is rated for AC-3 duty (motor switching) at a maximum of 750 switching cycles per hour, and AC-1 (resistive) at 1000 cycles per hour. If you're running a motor start/stop application, that 750 ops/h is the number to watch — it's the duty cycle that governs contact life under inductive loads. The mechanical life is typical at 30 million operations, so the contacts will wear out long before the mechanism does. The auxiliary switch is present and rated for various control voltages: 10 A at 24 V, 2 A at 48 V or 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. That covers most signal-level switching you'd need for status feedback or interlocking — just match the voltage to your control circuit. The coil terminals are screw-type, so you'll need a screwdriver for termination — no spring-cage here, but that's typical for this size class and gives a solid connection in high-vibration environments.

Thermal and Environmental Limits

Physical Fit and Clearances