The LX4D6PD is a replacement coil from the TeSys range, designed for LX1D6 contactors. It operates on a 155 V DC control circuit — that's the voltage you'll need to supply from your PLC output or control relay to pull the contactor in. Coil resistance measures 51.9 Ohm at 68 °F (20 °C), and the closed-circuit inductance is 4.18 H. These numbers matter for sizing your DC supply: at 155 V DC, the steady-state current draw is about 3 A (155 V / 51.9 Ω), so factor that into your 24 V DC bus budget if you're stepping up through a DC-DC converter. This coil does not include a built-in suppressor module. That means you need to add an external flyback diode or RC snubber across the coil terminals — otherwise the inductive kick when de-energizing can take out your PLC output or relay contacts. Standard practice: a 1N4007 diode (or similar 1000 V PIV) wired reverse-biased across the coil, cathode to positive.
Durability and operating conditions
That's one cycle per second sustained — fine for most conveyor or pump cycling, but if you're running a rapid-pick-and-place or stamping press application, check your actual duty cycle against this limit. Ambient temperature range is -5 to 60 °C (23 to 140 °F). The coil's resistance will drift with temperature — expect about 0.4% per °C change in copper wire. At the upper end of the range, the coil draws slightly less current but the magnetic force also drops; verify pull-in at elevated temperatures if your panel runs hot.