The Siemens 3RT1016-1BM45-ZX95 is a SIRIUS power contactor in the compact size S00 frame, designed for switching motor loads up to 4 kW at 400 V in AC-2 duty (slip-ring motors, starting/stopping) and rated 8.5 A at 400 V in AC-4 duty (plugging, inching, reversing). Three normally open main contacts handle the power circuit; the coil draws 3.3 W DC holding power, so the control transformer can be sized lean. Screw-type terminals on the main circuit accept up to 2x 4 mm² or 1x AWG 12, and the contactor mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022.
Width is 45 mm, height 57.5 mm, depth 114 mm — the S00 footprint fits tightly on a DIN rail enclosure. Side-by-side mounting is permitted with 6 mm spacing to adjacent devices, so a multi-contactor motor starter group packs into a narrow panel.
Auxiliary contact ratings and mechanical life
The auxiliary contact block (integrated or add-on) carries 10 A at AC-12 (resistive), 6 A at 230 V, 3 A at 400 V, 4.5 kW at 500 V, and 5.5 kW at 690 V. DC switching ratings: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V.