Replacement coil for a contactor, 125 V DC control circuit. Pickup requires at least 0.85 Uc and drop-out occurs between 0.2 and 0.35 Uc at 55 °C. Opening time 40–50 ms, closing 60–70 ms. The coil has no built-in suppressor module. This is critical: you must add an external freewheeling diode or RC snubber across the coil terminals. Without it, the inductive kick – the coil inductance is 230 H and inrush power is 1600 W at 20 °C – will arc across the control contacts and eventually destroy the pilot device or PLC output driving it. That puts it in the standard-duty range for a general-purpose contactor coil. If your application requires frequent on-off cycles (e.g., a resistance heater or motor jogging), verify the duty cycle against the contactor's own rating.
Schneider LX4FL125 TeSys Contactor Coil, 125 V DC, Obsolete
Schneider Electric / Square D TeSys contactor coil, 125 V DC, obsolete.
Specifications
| Parameter | Value |
|---|---|
| Control circuit type | DC low consumption |
| Product or component type | Contactor coil |
| Coil voltage | 125 V DC |
| Control circuit voltage limits | Drop-out 0.2...0.35 Uc 131 °F (55 °C)) Operational 0.85...1.1 Uc 131 °F (55 °C)) |
| Inrush power in | 1600 W 68 °F (20 °C)) |
| Hold-in power consumption in | 9 W 68 °F (20 °C) |
| Mechanical durability | 5 Mcycles |
| Range | TeSys |
| Category | US10I1222341 |
| Operating time | 40...50 ms opening 60...70 ms closing |
| Coil technology | Without built-in suppressor module |
| Device short name | LX4FL |
| Average resistance | 10 Ohm inrush 68 °F (20 °C) 2110 Ohm holding 68 °F (20 °C) |
| Maximum operating rate | 1200 cyc/h 131 °F (55 °C) |
| Inductance of closed circuit | 230 H |
| Ambient air temperature for operation | 23...131 °F (-5...55 °C) |
Product details
Frequently asked questions
What is the direct replacement for this coil?
The lifecycle record does not list an official successor. Without a manufacturer-assigned replacement order code, the safest equivalent is an identical used or new-old-stock LX4FL125 coil sourced through independent channels.
Can this coil drop into a panel built around the 8903SMO3V03 contactor?
No – the 8903SMO3V03 is a complete electrically held lighting contactor from the Type S series, not a TeSys contactor. The LX4FL125 coil only fits within the TeSys frame. There is no mechanical or electrical interchangeability.
What are the key electrical ratings of the LX4FL125?
Control circuit voltage: 125 V DC. Operating time: 40–50 ms opening, 60–70 ms closing. Inrush power 1600 W at 20 °C, holding power 9 W. No built-in suppressor. Mechanical durability: 5 million cycles. Ambient operating range: -5 to 55 °C.