The LP1K09004FD3 is a 4-pole (4 NO) contactor from the TeSys K range, rated 20 A in AC-1 utilisation category at 690 V AC. That 20 A figure is the conventional free-air thermal current (Ith) at 50 °C — the continuous current the power circuit can carry in open air. For a resistive load application, the rated operational current (Ie) matches that 20 A at 690 V, derating to 16 A above 70 °C. The 110 V DC coil pulls 3 W inrush at 20 °C and holds at the same 3 W, with a built-in bidirectional peak limiting diode suppressor for back-EMF control. Breaking capacity is 110 A across the common 220–440 V range, dropping to 80 A at 500 V and 70 A at 660–690 V. That means it clears faults reliably up to those levels without welding contacts — important for coordination with upstream protection. The associated fuse recommendation is 25 A gG or aM for the power circuit. For safety-related circuits, the B10d value is 1,369,863 cycles under nominal load per EN/ISO 13849-1, and 20 million cycles under mechanical load only.
Screw-clamp terminals accept a Philips No 2 or flat 6 mm screwdriver at 1.3 N·m torque. Operating temperature range is -25 to 50 °C, storage -50 to 80 °C, with no derating needed up to 2000 m altitude.
Compliance is broad: certified to EN/IEC 60947-4-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, GB/T 14048.4, and JIS C8201-4-1. The insulation voltage is 690 V per IEC, 600 V per UL/CSA. Impulse withstand is 8 kV, overvoltage category III.