The Siemens 3RT2016-1BF42 is a SIRIUS power contactor in the S00 frame size, designed for switching loads up to the rated DC voltage levels. Its 110 VDC coil uses screw-type terminals, and the contactor includes an auxiliary switch. Snap-on and screw mounting onto a 35 mm DIN rail per DIN EN 60715 makes panel integration straightforward. The 45 mm width and 73 mm depth fit standard enclosure layouts, and the mounting position allows +/-180° rotation on a vertical surface plus +/-22.5° tilt forward/backward — useful when the panel layout is tight. Rated for continuous operation from -25 to +60 °C and storage from -55 to +80 °C. Wire sizes accepted: solid or stranded 0.5 to 4 mm², and up to 2x 4 mm² or 2x (0.75...2.5 mm²).
DC Switching Capacity
DC switching ratings are specified per voltage: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. These are the contactor's make/break limits for DC resistive loads — important for battery-backed or rectified circuits where DC arc extinction is harder than AC.
Switching Frequency and Mechanical Life
Maximum switching 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). Typical mechanical life is 30,000,000 operations.