What this SIRIUS contactor is and where it fits
The Siemens 3RT2016-1FB42-ZX95 is a SIRIUS power contactor in size S00, built for switching motor loads in control panels. It mounts on a 35 mm DIN rail per DIN EN 60715, using either screw-clamp or snap-on fastening. The 45 mm width and 73 mm depth let it fit standard gland-plate layouts without crowding adjacent devices. The coil is rated 24 VDC with a pickup threshold of 0.8 x rated value. Dropout timing on DC is 38 to 65 ms, and arcing time runs 10 to 15 ms. Operating temperature range is -25 to +60 °C, storage -55 to +80 °C. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, so it adapts to tight enclosures or angled backplanes.
Key ratings and what they mean for your load
The auxiliary switch is present, and the main contact wire range accepts solid 0.5 to 4 mm² and stranded 0.5 to 4 mm², with combinations up to 2x 4 mm² or 2x (0.5 to 1.5 mm²). Screw-type terminals on the magnet coil mean standard termination tools work. Switching frequency limits depend on duty: AC-1 (resistive) allows up to 1,000 operations per hour; AC-3 (motor starting) and AC-3e both cap at 750 ops/h; AC-4 (plugging/inching) drops to 250 ops/h. These are the thermal limits of the contactor — exceeding them shortens life or causes welding. Rated operational current varies by 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. At 230 V the rating is 1 hp. These are the contact ratings for the auxiliary or main circuit depending on configuration. Mechanical life is typical 30 million operations. Clearance distances: 10 mm upwards, forwards, and downwards; 6 mm at the side. This affects how close you can pack adjacent devices on the DIN rail without derating.