The Schneider Electric TeSys K LC2K1601E7 is a reversing contactor — three poles, normally open power contacts, with one normally closed auxiliary contact built in. It's rated for AC-3 duty at 16 A up to 440 V, which means it's sized for switching three-phase induction motors in the 5–7.5 kW range depending on line voltage. The coil pulls in on 48 V AC, a common control voltage in older European panel designs. The unit ships preassembled with the reversing power busbar, so you're not hunting for the interlock kit or bus links during a swap.
The IP20 finger-safe terminals (per VDE 0106) mean it's suited for enclosed control panels where incidental contact is the only exposure — not for washdown zones or outdoor cabinets.
The AC-4 rating covers plugging and inching duty, which is harder on the contacts; if your application reverses under load frequently, the AC-4 current will be lower than the AC-3 number. The 1 NC auxiliary is wired as a mechanical interlock in the reversing pair, preventing both contactors from pulling in simultaneously. The 48 V AC coil draws about 6 VA inrush and 4.5 VA sealed — check your control transformer sizing if you're replacing a 24 V DC or 110 V AC unit.
The contactor handles 10 Gn shocks on the Y and Z axes with the contacts closed, and 6 Gn on X when open — relevant for mobile equipment or near heavy impact sources. Vibration resistance is 4 Gn closed, 2 Gn open across 5–300 Hz. Altitude derating starts above 2000 m. The V1 flame retardance rating per UL 94 means the housing material self-extinguishes, which matters for panel certification in rail or building services.