The contact ratings drop sharply as voltage rises — 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 1 A at 690 V — so the voltage in your control circuit governs how much load this contactor can actually switch. Use the AC-12 rating (10 A max) for resistive loads; inductive loads like contactor coils need derating. Mechanical life is typical 30 million operations, which is high for an auxiliary block — it will outlast most main contactors it rides with. Shock resistance is 10g / 5 ms and 5g / 10 ms, enough for machine-tool or conveyor applications with moderate vibration.
Screw terminals accept solid or ferruled stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². Zero side clearance needed between units. Depth is 72 mm, height 57.5 mm — the S00 footprint matches the Siemens 3RT1 contactor series, so this auxiliary block clips directly onto the main contactor without extra panel space.