Siemens 3RT2516-1BG40 — SIRIUS Size S00 Contactor, 24 VDC Coil
The Siemens 3RT2516-1BG40 is a SIRIUS contactor in Size S00, with a 24 VDC magnet coil and screw-type terminals for both the main current circuit and the auxiliary switch. It snaps onto a 35 mm DIN rail per EN 50022 and measures 45 mm wide, 57.5 mm high, and 73 mm deep — a compact footprint that fits standard control-panel layouts. The coil picks up at 0.8 × rated voltage (19.2 VDC) and holds reliably; dropout occurs below the minimum holding threshold. Mechanical life is rated at 30,000,000 operating cycles, with electrical endurance at AC-1 maximum of 1,000,000 cycles and a maximum switching frequency of 10,000 1/h under AC operation.
Switching Ratings & Load Capability
At 24 V rated value the contactor switches 10 A; at 230 V rated value it also handles 10 A, making it suitable for motor loads up to that current in AC-3 duty. For DC switching, the ratings drop with voltage: 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. The key difference is coil voltage: the 3RT2516 runs on 24 VDC, while the 3RT2526 variant uses a different coil rating — verify your control voltage before substituting.
Mounting & Environmental Limits
Side-by-side mounting is permitted with 6 mm spacing at the side, and zero clearance required upwards, forwards, backwards, and downwards — simplifying dense panel layouts. The screw terminals accept solid or stranded conductors: 2× (0.5 to 1.5 mm²), 2× (0.75 to 2.5 mm²), and 2× 4 mm² — standard for panel wiring with ferruled or bare ends.