The 3RT7027-1AF00: The AC-3 rated operational voltage of 690 V maximum means this contactor can switch three-phase motor loads up to that line voltage — common in 400 V and 690 V industrial networks. For DC-13 duty at 220 V, the rated operational current is 0.3 A, so it handles moderate DC loads like solenoid valves or DC brake coils within that limit. For type 1 and type 2 coordination, the recommended backup fuse is a gL/gG NH 3NA: 50 A for type 2, and 125 A for type 1. This is critical when sizing the short-circuit protection device upstream — using a smaller fuse than specified may cause the contactor to weld under fault.
Side-by-side mounting is permitted, so multiple contactors can be ganged without additional spacing — useful for compact motor control centers. Dimensions: 85.5 mm height, 45 mm width, 91 mm depth. The 45 mm width occupies two 22.5 mm module spaces on a DIN rail — a standard footprint for S0 contactors. IP20 on the front and terminals means it is touch-safe but not sealed against water; install inside a panel with at least IP54 enclosure for washdown areas.