Panel fit — DIN rail, screw terminals, clearances
The 3RA2220-4BB26-0AP0: Mounts on 35 mm DIN rail via an adapter for screw or snap-on fastening; the mounting position is vertical. Dimensions are 90 mm wide, 120 mm deep, 265 mm tall — the S0 footprint fits standard motor starter slots in Siemens panels. Main circuit connections use screw-type terminals. Minimum clearance requirements: 50 mm upwards, 32 mm forwards, 10 mm downwards, 10 mm at the side, 0 mm backwards — plan the gland plate and wire bend radius accordingly.