It carries four instantaneous normally-open (NO) contacts, meaning all four switch together the instant the coil picks up, with no built-in delay. The 6 kV surge voltage resistance (rated value) means it withstands the transients you get switching inductive loads in an industrial cabinet without flashover.
Where it fits — panel and mounting
Size S00 frame, 45 mm wide, 57.5 mm high, 111 mm deep. Snaps onto DIN rail or screws directly to a mounting plate — the evidence lists both fastening methods. Accepts solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm² per terminal. That covers most control-circuit wire gauges you'd run in a panel.
Contact reliability and environmental limits
Contact reliability is rated at one incorrect switching operation per 100 million cycles at 17 V, 1 mA — that's the low-energy regime where oxide films on silver-alloy contacts can cause trouble. For a PLC input sensing a contactor's aux, this matters: it means the contacts reliably wet at logic-level loads. Mechanical life is 10 million typical operations. Shock resistance: 10g for 5 ms and 5g for 10 ms. Pollution degree 3 — suitable for the conductive-dust environment inside an unsealed industrial panel.