SIRIUS S2 Contactor — 3RT2337-1NB30-ZX95
The Siemens SIRIUS 3RT2337-1NB30-ZX95 is a Size S2 contactor with a 20-33 V AC/DC coil, screw-type terminals, and an integrated auxiliary switch. It fastens via screw or snap-on mounting onto 35 mm DIN rail per DIN EN 60715, fitting a standard panel enclosure. The 20-33 V AC/DC coil draws 2 VA at 50 Hz and 2 VA at 60 Hz, with an inrush peak of 3 A. The coil holds across the full voltage band; the 0.8 initial and 1.1 full-scale multipliers bracket the operating range.
Mounting and Integration
The S2 frame measures 114 mm high, 75 mm wide, and 130 mm deep. Mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving flexibility in tight panel layouts. Clearance requirements: 10 mm upwards, 10 mm downwards, 10 mm forwards, and 6 mm at the side. The screw-type coil terminals accept 2x (0.5-1.5 mm²) and 2x (0.75-2.5 mm²) solid or stranded wire.
Switching Performance and Environment
Operate time is 30-55 ms for both AC and DC; arcing time runs 10-20 ms. The contactor is rated for operation from -40 to +70 °C and storage from -55 to +80 °C, covering most industrial enclosure conditions. Mechanical life is typical 10,000,000 operations. The auxiliary switch is included, with switching capacity at various voltages: 10 A at 24 V, 10 A at 230 V, 3 A at 400 V, among others.