What it is and where it fits
The Siemens 3RT2016-2WB41 is a SIRIUS coupling contactor in the S00 frame size, designed for switching loads in control panels. The 24 VDC coil pulls in at 85% of rated voltage (20.4 V) and holds reliably; the spring-type terminals accept 0.5 to 4 mm² solid or stranded wire, so no screwdriver torque check on the line — just strip, insert, release. Rated at 10 A at 24 VDC for the main contacts, it handles resistive and light inductive loads in that voltage range. The contactor mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward/backward — useful when you're squeezing it into a crowded gland plate.
Panel integration notes
Dimensions: 45 mm wide, 70 mm high, 121 mm deep — the depth is the dimension that sticks out from the DIN rail, so check your enclosure depth if you're retrofitting into a shallow gland plate. Clearances: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the side. That's tight enough for most standard enclosures, but the forward clearance means you need room for the spring terminals and wiring loop. Operating temperature range is -25 to +60 °C; storage from -55 to +80 °C. The mechanical life is rated at 30 million operations typical — that's a lot of cycles for a coupling contactor in a high-duty application like conveyor interlocking or valve control.
Switching performance and duty ratings
Maximum operating frequency varies by duty: 1,000 cycles/hour at AC-1 (resistive), 750 cycles/hour at AC-2 and AC-3 (motor starting/running), and 250 cycles/hour at AC-4 (plugging/inching). The arcing time is 10 to 15 ms, and the DC switching time is 5 to 20 ms — fast enough for most control logic, but if you're coordinating with a PLC scan cycle, account for the spread.