Bulletin 505 NEMA Starters

The Allen-Bradley Bulletin 505 is a family of NEMA-rated magnetic motor starters — both non-reversing (RVSG) and reversing configurations — covering a wide range of motor sizes and enclosure types for industrial motor control applications. The catalog number encodes key selection criteria: the first letter indicates starter size (T = Size 00 at 5/10 A, A = Size 0 at 15/20 A, B = Size 1 at 30 A, C = Size 2 at 60 A, D = Size 3, E = Size 4), the second letter designates enclosure type (A = NEMA 1 General Purpose, J = NEMA 3R/4/12 Metal, O = Open), and the third letter reflects coil voltage (A = 120V 60 Hz, C = 600V 60 Hz, D = 110V 50 Hz, H and others for additional voltages). Among the 88 stocked part numbers, frequently ordered units include the 505-CAD (Size 2, 60 A, NEMA 1), 505-BJD (Size 1, 30 A, NEMA 3R/4/12 metal enclosure), and the 505-EOD reversing starter (Size 4, open enclosure). Suffix characters such as -A2G-6P denote factory-installed accessory options. With 88 configurations available, buyers should confirm coil voltage, NEMA enclosure rating, and ampere rating before selecting a catalog number.