Four normally-open (NO) instantaneous contacts, no leading, lagging, delayed, or make-before-break switching. That means it's a straight 4 NO block for adding interlock, status feedback, or PLC input signals to a motor starter or contactor assembly. Size S00 footprint: 45 mm wide, 60 mm tall, 73 mm deep.
Thermal current (Ith) at 24 V is 10 A. At 110 V it drops to 1 A, at 230 V to 6 A, at 400 V to 3 A, at 500 V to 2 A, and at 690 V to 1 A. These are AC ratings at the respective voltage levels — so for a 230 V control circuit you can switch up to 6 A per contact; for a 400 V signal circuit you're limited to 3 A. The rated insulation voltage is 400 V at 50 Hz and 400…440 V at 60 Hz, with a surge voltage resistance of 6 kV. Pollution degree 3 (industrial environment, conductive pollution).
Fastening method: screw and snap-on mounting. The solid conductor capacity is 2x (0.25 … 2.5 mm²) — two solid wires per terminal, fine for control wiring. IP20 on the front: protected against finger contact, not against water — keep it inside a panel. The contactor is rated for a shock resistance of 10g / 5 ms and 5g / 10 ms, and an operating temperature range of -25 to +60 °C, storage/transport from -55 to +80 °C. That covers most industrial enclosures.
Compliance: RoHS compliant with a substance prohibition date of 07/01/2006. The auxiliary switch extension is possible — the product extension auxiliary switch is marked 'Yes', so you can add mechanical auxiliary switch blocks on top.