The LX1LD500 is a replacement coil for the TeSys Integral range, designed for 500 V AC 50 Hz or 575–600 V AC 60 Hz control circuits. It pulls 420–500 VA inrush at 60 Hz (cos φ 0.55) and 350–400 VA at 50 Hz (cos φ 0.55), then holds at 24–36 VA (60 Hz) or 20–30 VA (50 Hz). That inrush-to-hold ratio means the control transformer supplying it needs to handle the initial surge without dropping below the 0.85 x Uc dropout threshold — a common miss when swapping coils into existing panels.
Coil specs that matter for fit
Coil resistance measures 152.18 Ω at 68 °F (20 °C), and the closed-circuit inductance is 31 H. The control voltage limits are 0.85–1.1 x Uc for operation, with dropout between 0.25–0.7 x Uc at ≤131 °F (55 °C).