It carries four normally-open instantaneous contacts and zero normally-closed, so it is the right pick when a design needs extra NO interlock or signal feedback without adding NC wiring. The S00 frame keeps the footprint tight — 45 mm wide, 57.5 mm tall, 72 mm deep — and the screw-and-snap-on mounting lets it land on a DIN rail or a panel plate without extra brackets.
Each NO contact is rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — these are the thermal current limits for switching resistive or lightly inductive loads in the control circuit. The 24 V rating at 10 A is the one that matters most for PLC or relay interface circuits running on a 24 VDC control bus; the 230 V and 400 V ratings cover line-voltage pilot devices. Contact reliability is specified as one incorrect switching operation per 100 million cycles at 17 V and 1 mA, which means it handles dry-contact logic-level signals without stuttering.
Front-side protection is IP20 — finger-safe but not sealed, so keep it inside the enclosure. Shock resistance is 10g for 5 ms and 5g for 10 ms, adequate for industrial cabinet vibration.