SIRIUS S00 power contactor — 24 VDC coil, screw terminals
The Siemens 3RT1016-1BB41-ZW95 is a SIRIUS S00 power contactor with a 24 V DC coil, rated for switching motor loads and resistive circuits in control panels. It mounts via screw and snap-on onto a 35 mm DIN rail per EN 50022, fitting into a 45 mm wide slot with 57.5 mm height and 72 mm depth — a compact footprint for dense panel layouts. The IP20 front and terminal protection means it's suited for enclosed cabinets where no washdown exposure occurs.
Key ratings and what they mean for fit
The AC-2 rating at 400 V is 4 kW, which covers slip-ring motor switching where the contactor makes and breaks under load — common in crane or elevator drives. The AC-4 rating at 400 V is 8.5 A, for reversing or inching duty where the contactor switches stalled-rotor current. For general resistive or motor starting (AC-3), the 24 V coil pulls 3.3 W closing and holding power, so the control transformer or DC supply must deliver that continuously. The main circuit accepts screw terminals with wire sizes up to 2x (0.75...4 mm²) solid or stranded, or AWG 12 single conductor — no ferrule crimping needed for stranded if using the screw clamp correctly.
Panel integration notes
The 45 mm width means it occupies a single 45 mm slot on a 35 mm DIN rail. Side-by-side mounting is allowed with 6 mm spacing to adjacent devices for heat dissipation. The screw terminals accept 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid/stranded, and up to 1x 12 AWG for the main circuit — no special tools beyond a screwdriver. For type 2 coordination, use a gL/gG 20 A fuse; for type 1, a 35 A fuse is sufficient.