The YuCo YC-CN-42-403-7 Definite Purpose Contactor is a robust electrical switching device designed for demanding industrial applications. Operating at 277VAC 50/60Hz, this versatile contactor features a 40-amp rating and supports up to 20HP in 3-phase systems. With multiple voltage options (240/277V, 480V, and 600V), it offers flexible installation possibilities. The contactor includes clear terminal markings (L1, L2, L3 and T1, T2, T3) for straightforward wiring. Its short circuit rating of 5KA at 600V when protected by 90A UL Listed fuses ensures reliable operation. The device features precise torque specifications - 20 in-lbs for screws and 40 in-lbs for lugs - guaranteeing secure connections. This contactor is particularly suited for HVAC systems, industrial machinery, and power distribution applications where consistent performance is crucial.