Siemens 3RT2327-2AK60 SIRIUS Contactor, Size S0, 60 mm

The auxiliary contact ratings cover the common control voltages you'll see on a lube skid or conveyor line: 10 A at 24 V, 10 A at 230 V, 3 A at 400 V, and 0.1 A at 600 V. The mechanical life is listed at 10 million operations typical, so this contactor will outlast the motor it's switching on most cyclic loads. If your panel sits next to a hot bearing housing or a steam line, the -25 to +60 window covers most plant-floor conditions. The arcing time is 10 ms, and the AC switching time is 4 to 16 ms — fast enough for standard motor starting, but if you need faster break for a solid-state load, you'll want a DC coil variant. That's tighter than some older contactor families, so you can pack these closer on the DIN rail. Just don't skimp on the side gap if you're running multiple contactors in a row — the 6 mm is the minimum for heat dissipation.