The Schneider Electric A9C20433 is an Acti9 iCT contactor — a 3-pole, normally-open contactor rated for 25 A in AC-7A duty (motor-heating-lighting loads) and 8.5 A in AC-7B (resistive lighting), with a control coil that pulls 127 V AC at 60 Hz. The 3 NO pole composition means it switches three separate lines simultaneously, which is what you need for a 3-phase motor or a three-wire heating circuit. Rated operational voltage is 400 V AC at 60 Hz, with an insulation voltage of 500 V AC 50/60 Hz. That puts it solidly in the 400 V class for light commercial gear — think small pumps, exhaust fans, or banked lighting contactors in a retail strip. The contactor is rated for 100,000 electrical cycles under AC-7A at 25 A, and 30,000 cycles under the heavier AC-7B and AC-3 motor-duty curves. Mechanical durability is rated at 1,000,000 cycles, so the coil and armature outlast the contacts in most duty cycles.
Depth is 68 mm, which clears most shallow enclosures. Terminals are tunnel type: power circuit accepts 1 to 4 mm² flexible or 1.5 to 6 mm² rigid; control circuit accepts 1.5 to 2.5 mm² rigid or flexible. Tightening torque is 0.8 N.m for both control and power circuits — use a torque screwdriver; overtightening strips the tunnel. IP20 on the body, IP40 inside a modular enclosure per IEC 60529.
Designed and tested to IEC/EN 61095 (household and similar electromechanical contactors) and EN/IEC 60947-4-1 (low-voltage switchgear — contactors and motor-starters).