The Schneider Electric LC1E25008M5WB is a 4-pole contactor from the Easy TeSys Control range, rated for 40 A in AC-1 duty at up to 440 V AC. That 40 A figure is the resistive-load current it can switch continuously — think heater banks, lighting, or transformer primary circuits, not motor starts.
The 40 A AC-1 rating is the headline number, but the part's real-world thermal capacity is also visible in the 2.5 mOhm average impedance per pole and 3.2 W dissipation per pole at full AC-1 load. The 40 A gG fuse coordination (type 1) at 690 V tells you what upstream protection keeps the contactor from welding on a fault — standard for this class. The pole configuration is 2 NO + 2 NC, which is a common arrangement for switching a resistive load on two poles and using the other two for auxiliary signaling or a second load circuit. No built-in auxiliary contacts — if you need an early-make or late-break signal, you add a side-mount block.
This contactor is designed for panel mounting on a DIN rail (35 mm) or a flat plate. At 56 mm wide, 84 mm tall, and 93 mm deep, it occupies about the footprint of a standard four-pole contactor in this current class. Screw-clamp terminals on both power and control circuits accept up to 6 mm² flexible with ferrules on the power side, and 4 mm² on the control side. Tightening torque is 1.5 N.m for power and 1.2 N.m for control — use a torque screwdriver; the terminals are brass and strip easily if overtightened. The TH protective treatment per IEC 60068-2-30 means it passed the damp-heat cyclic test — important if the panel sees humidity swings.