SIRIUS S0 power contactor — 24 VDC coil, screw terminals
The Siemens 3RT2026-1FB48-0GS3 is a SIRIUS power contactor in the S0 frame size, designed for switching motor loads and resistive loads in control panels. It carries a 24 V rated-value coil drawing 6 A at that voltage in DC-13 duty, so it suits PLC or relay-driven 24 VDC control circuits without an intermediate interface. The contactor mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 60715, with flexible orientation: +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward.
Ratings and what they mean for fit
The S0 frame carries screw-type terminals for main contacts accepting solid or stranded conductors from 1 to 10 mm², roughly 16 to 8 AWG. That covers most panel wiring for contactors at this frame size — no need for ferrule adapters on stranded wire up to 10 mm². Switching frequency varies by duty class: 1 000 cycles/hour at AC-1 (resistive), 750 at AC-2 and AC-3 (motor starting/running), and 250 at AC-4 (plugging/inching) (–). For a conveyor or pump running standard AC-3 duty, the 750 cycles/hour ceiling is generous — it won't limit a normal production cycle. The DC coil dropout timing is 15 to 17.5 ms, which matters for coordination with upstream safety relays or PLC outputs that need to see the contactor open within a known window. Operating temperature range is -25 to +60 °C; storage from -55 to +80 °C — fine for most indoor panel environments but not rated for extended outdoor storage without climate control.
Panel integration notes
At 45 mm wide, 85 mm high, and 151 mm deep, the S0 frame fits standard 45 mm DIN-rail pitch. The contactor has no auxiliary switch built in, so if you need auxiliary contacts for status feedback or interlocking, order a separate side-mount auxiliary switch block. The IP20 protection rating applies to the front and terminals — suitable for enclosed panels; not rated for washdown or outdoor exposure. Mounting clearances: 10 mm upwards, forwards, and downwards, 6 mm at the side — tight enough for dense panel layouts.