The Schneider Electric TeSys K LP4K12017SW3 is a 3-pole contactor rated for AC-3 duty at 12 A up to 440 V, with a 72 V DC coil. The single normally-closed auxiliary contact is built in. Coil suppression uses a built-in bidirectional peak limiting diode suppressor, so no external flyback diode is needed on the control wiring.
Key specs for fit and compliance
Flame retardance meets V1 per UL 94, plus NF F 16-101 and NF F 16-102 Requirement 2, which matters for rail and transit applications where fire-smoke-toxicity compliance is required. Hold-in power consumption is 1.8 W at 20 °C.