The LP5K12103BW3 is a TeSys K reversing contactor from Schneider Electric, a 3-pole unit rated for AC-3 motor switching up to 12 A at 440 V, with a 24 V DC coil.
If you need a drop-in replacement, the closest functional match within the TeSys K family would share the same 3P, AC-3 12 A, 24 V DC coil footprint, but pin compatibility and busbar alignment must be verified against the specific panel layout.
For a 400 V system, that roughly corresponds to a 5.5 kW motor, though the exact sizing depends on the motor's full-load amps and duty cycle. The 24 V DC coil is standard for PLC-controlled panels, but note the coil draw is not listed here — verify against your output card's drive capability. The contactor's mechanical robustness specs (15 Gn shocks closed, 4 Gn vibration) indicate it's built for industrial environments with moderate shock and vibration, typical for machine tools or conveyors. Operating altitude is 2000 m without derating, so it's fine for most sites. Above that, expect to derate the thermal current. Storage temperature range of -50 to 80 °C is generous, but operating range is -25 to 50 °C — keep that in mind for unheated cabinets in cold climates.
The contactor carries V1 flame retardance per UL 94, and meets NF F 16-101 and NF F 16-102 for railway fire-smoke-toxicity requirements. Protective treatment conforms to IEC 60068 and DIN 50016 for environmental resistance. IP20 per VDE 0106 provides basic finger protection.