The Siemens 3RT1017-2JB42 is a SIRIUS power contactor in the compact S00 frame, designed for switching loads up to 10 A at 24 V DC and 5.5 kW at 400 V AC-3.
Spring-loaded terminals on the main circuit accept 2x (0.25–2.5 mm²) solid or stranded wire — no screw torque to verify, which speeds panel wiring.
Switching ratings and coordination
Rated for AC-3 motor switching at 5.5 kW across 400 V to 690 V. AC-4 at 400 V handles 8.5 A for reversing or inching duty. For type 2 coordination, a 20 A gL/gG fuse is specified; type 1 allows a 35 A fuse.
