TeSys LC4-D DOL starter — 40 A, 48 V AC coil
The Schneider Electric LC4D40E7 is a direct-on-line (DOL) starter from the TeSys LC4-D range, combining a contactor and fuse disconnector in one plate-mounted assembly. Rated at 40 A operational current (Ie) under AC-3 utilisation category, it is sized for squirrel-cage motor starting across a wide voltage band: 11 kW at 220–230 V AC, 18.5 kW at 380–400 V, 22 kW at 415–500 V, and 30 kW at 660–690 V, all at 50/60 Hz. The 48 V AC coil suits control circuits fed from a step-down transformer — common in machine-tool and conveyor panels where low-voltage control is standard for operator safety.
AC-3 duty and motor coordination
AC-3 utilisation category means this starter is rated for starting squirrel-cage motors and disconnecting them while running — the standard duty for most industrial motor branches. The 40 A continuous rating sets the thermal budget for the main poles; coordination with an overload relay (such as the TeSys LR2 or LRD series) is required to provide motor overload and phase-loss protection. The starter itself does not include integral overload protection — that is added externally between the contactor and the motor.
Plate-mounted design with a footprint of 281 mm wide × 143 mm tall × 130 mm deep. The depth is the dimension behind the panel — relevant when boxing into a shallow enclosure or when gland plates and busbars reduce available clearance. Width of 281 mm means it occupies roughly 11 inches of backpanel real estate; plan for side-access to the fuse disconnector handle and coil terminals. The LC4 prefix indicates the integrated fuse-switch disconnector upstream of the contactor, saving a separate fuse base and reducing wiring labour.
Listed as current production (active lifecycle stage). No end-of-life notice or last-time-buy date is recorded for this order code. For new panel designs or BOM freeze, the LC4D40E7 is a standard catalogue item within the TeSys range, meaning supply continuity is typical for the series.
