The Siemens 3RT1015-1BB42 is a SIRIUS power contactor in the compact S00 frame, coil rated 24 V DC. Built for switching motor loads in control panels and machinery, with a rated operational current up to 10 A for AC-12 duty at 24 V. Mechanical life of 30 million operations means it handles high-cycle applications.
Key ratings for real motor applications
Coil power draw is steady at 3.3 W both closing and holding, so no intrusive inrush to the 24 V DC supply.
Mounting and wiring
Mounts on 35 mm DIN rail (DIN EN 50022) with screw and snap-on. Occupies 45 mm width, 57.5 mm height, 72 mm depth. Side-by-side mounting allowed — no derating gap needed. Main circuit terminals accept 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), max 2x (0.75...4 mm²) or 1x 12 AWG. Same range for auxiliary contacts. IP20 on front and terminals.