The LX1FX175 is a replacement contactor coil from the TeSys range, built for LX1F contactors that run on a 175 V AC control circuit at 50/60 Hz. That voltage is the coil's nominal pick-up — it's what the contactor needs to pull in and hold. If your panel's control transformer or supply bus is 175 V AC, this coil matches without a step-down. It's rated for 5 million mechanical cycles and can operate at up to 600 cycles per hour at 55 °C. For a contactor coil, that's a solid duty cycle — it'll handle frequent jogging or repetitive start/stop sequences on a conveyor or pump station without wearing out the armature prematurely.
The 175 V AC coil is the main spec to get right. Wire it into a 120 V or 240 V control circuit and it won't pull in reliably — or it'll burn out. This is a common gotcha when swapping coils on older LX1F contactors: verify your control voltage at the coil terminals, not the transformer tap. The 5 Mcycles mechanical durability tells you the coil's plunger and yoke will last through roughly 5 million operations before the mechanical parts fatigue. In a typical panel running 10 cycles per hour, that's over 50 years of service. The electrical life (contact wear) will be shorter depending on your load, but the coil itself won't be the weak link. The 600 cycles/hour max at 55 °C means the coil can handle rapid re-energization without overheating. If your application needs faster cycling — say a high-speed pick-and-place — you'd need to derate or look at a DC coil variant.