The Schneider Electric LP1K09004ZD is a TeSys K contactor with 4 normally-open poles, rated for 20 A in AC-1 duty (resistive loads) at up to 690 V AC 50/60 Hz. The 20 V DC coil pulls in at 0.8 to 1.15 times nominal and drops out between 0.1 and 0.75 Uc below 50 °C. Coil hold-in power runs 3 W at 20 °C.
The AC-1 rating means this contactor is sized for resistive loads — heaters, lighting banks, or transformer primaries — not for motor starting (which would need an AC-3 rating). The 4 NO pole arrangement gives four independent switching paths, all normally open; there are no NC auxiliary contacts built in. Rated breaking capacity hits 110 A at 415 V and 440 V, tapering to 70 A at 660–690 V. For safety-related circuits, the B10d value is 1,369,863 cycles under nominal load per EN/ISO 13849-1, or 20 million cycles with mechanical load only.
Screw-clamp terminals accept a Philips No 2 or 6 mm flat screwdriver at 1.3 N·m torque. The power circuit impedance is 3 mΩ at 20 A, 50 Hz.