Product Identity and Role
The Siemens 3RT2015-1QB42 is a SIRIUS coupling contactor in the Size S00 frame, designed for switching DC loads in control circuits.
The Size S00 footprint is compact at 45 mm wide, 58 mm tall, and 117 mm deep, fitting standard control panel enclosures.
Electrical Ratings and Switching Capability
Rated coil voltage is 24 V DC with a pick-up threshold of 0.7 x rated value and a drop-out range of 0.2 to 0.12 x rated value. The main contacts are rated for DC-13 duty: 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 3 A at 400 V. For AC motor loads, it carries a 0.75 hp rating at 230 V. Switching frequency limits: 1,000 cycles/hour at AC-1, 750 cycles/hour at AC-2 and AC-3, and 250 cycles/hour at AC-4.
Timing and Environmental Specs
DC switching time is 7 to 20 ms. Wire capacity accepts solid or stranded conductors from 0.5 to 4 mm², with dual-wire capability for 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm².