The Siemens SIRIUS 3RT1016-1BF45-ZX95 is a Size S00 power contactor with a 110 VDC coil, designed for switching motor loads in control panels. It mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022, so it fits standard panel layouts without extra bracketry.
Ratings and what they mean for the panel
The 110 VDC coil pulls 3.3 W on close and hold, so the power supply doesn't need a big inrush buffer. At 400 V AC-3 duty it's rated for 4 kW motor load; at 690 V it handles 5.5 kW. AC-4 at 400 V gives 8.5 A for reversing or inching service, where the contacts take a harder hit. The mechanical life is rated at 30 million operations, so this contactor will outlast most machinery rebuild cycles. The three main poles are rated for 10 A at AC-12 (resistive), 6 A at 230 V, and 3 A at 400 V. For DC switching, the coil-side auxiliary contacts handle 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. That's enough for most pilot-duty circuits, but watch the DC voltage curve if you're switching a solenoid valve bank. Screw-type terminals accept two conductors per clamp: 0.5 to 1.5 mm² solid, 0.75 to 2.5 mm² stranded, or a single 4 mm². AWG equivalents are 2x 20-16, 2x 18-14, or 1x 12. That covers most panel wiring without needing ferrules, though stranded always benefits from them. Operating temperature range is -25 to +60 °C, with a pollution degree of 3. That means it's fine in a typical industrial enclosure with conductive dust or occasional condensation. IP20 on the front and terminals keeps fingers out but doesn't stop water — mount it inside a cabinet, not out in the washdown.