The Schneider Electric A9C15187 is an Acti9 CT40 contactor — a 2-pole (2 NO) device rated for control circuit switching in residential and light commercial distribution boards. The coil is 230 V AC at 50 Hz, drawing 15 VA inrush and holding at 3.8 VA. Rated operational current is 25 A in AC-7A category (general resistive loads) and 8.5 A in AC-7B (motor loads). The utilisation category per IEC 60947-4 is AC-1, confirming it for resistive switching at full rating.
Dimensions are 87 mm high x 18 mm wide x 66 mm deep, so it fits standard modular enclosure cutouts. Terminals accept up to 6 mm² rigid (power circuit) or 2 x 2.5 mm² flexible. Wire stripping length is 10 mm; tightening torque is 0.8 N·m. The tunnel-type terminals are common for this class — straightforward for panel wiring.
The 25 A AC-7A rating covers resistive loads like lighting banks and heating elements. The 8.5 A AC-7B rating is the one to watch for motor-driven loads — pumps, fans, compressors — where inrush and inductive break are higher. Electrical durability is 100,000 cycles at 25 A AC-7A, dropping to 30,000 cycles at 8.5 A AC-7B. If your application cycles more than 30,000 times under motor load, this contactor's life is shorter than the headline number suggests. Switching frequency is capped at 100 operations per day (6 per minute). That is fine for on/off control of a lighting circuit or a small motor starter, but not for high-speed cycling like a rapid-pick conveyor or a welding gun. The control signal is maintained (not momentary), so the coil stays energised continuously during the on state.