What this part is and what it does
The LC8K12017B7 is a TeSys K reversing contactor from Schneider Electric, preassembled with a reversing power busbar for motor control in a compact 3-pole package. It switches loads in AC-3 duty (motor starting) up to 12 A at 440 V, and also covers AC-1 resistive and AC-4 inching/jogging applications. The 24 V AC coil is suited for control circuits common in panel installations.
Key ratings and what they mean for fit
The AC-3 rating of 12 A at 440 V governs motor switching — this contactor directly handles a motor drawing up to 12 A full-load current in that duty class. The 690 V AC rated operational voltage on the power circuit covers 400 V and 480 V line supplies common in industrial panels. IP20 finger-safe protection (VDE 0106) means it is intended for enclosed panel mounting, not exposed washdown areas. Operating altitude up to 2000 m without derating covers most standard installations.
Lifecycle and sourcing reality
This part is marked obsolete by the manufacturer. For a project or BOM line that requires this exact order code, sourcing goes through surplus or broker channels — quoted to order against an RFQ. No official successor is listed in the lifecycle record, so the replacement path depends on a parametric match within the TeSys range; the buyer should confirm fit with the application specs (AC-3 current, coil voltage, reversing configuration) before substituting.
Deployment context
This reversing contactor mounts on a DIN rail inside a control panel, with the preassembled busbar reducing wiring time for forward-reverse motor circuits. The 57 mm depth fits standard enclosure depths, and the 90 mm width leaves room for adjacent contactors or overload relays on the same rail.