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Allen-Bradley 509-A0B - NEMA Size 0 Motor Starter, 18A

United Fuses
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Allen-Bradley 509-A0B is a NEMA Size 0 full voltage non-reversing motor starter designed for reliable control and protection of industrial 3-phase motors. It is rated for 18 Amps continuous current with a 21 Amp service limit, supports motor voltages up to 575V AC, and operates with a 480V AC coil voltage (440V at 50 Hz, 480V at 60 Hz). This open-type, 3-pole starter weighs 4 lb and features a magnetic trip unit for non-plugging and non-jogging duty applications. It meets NEMA standards for industrial motor control equipment. Typical applications include starting and stopping motors in conveyors, pumps, fans, and other machinery requiring non-reversing operation.

Key Features & Specifications
  • Type: NEMA Size 0, open type, non-reversing motor starter
  • Amperage: 18 Amps continuous, 21 Amps service limit
  • Voltage: 115-575V AC motor voltage rating
  • Coil Voltage: 440V at 50 Hz, 480V at 60 Hz
  • Poles: 3
  • Max HP: 5 HP at 575V
  • Weight: 4 lb
  • Series/Frame: Bulletin 509
  • Trip Unit: Magnetic motor starter, non-reversing
  • Certifications: Meets NEMA standards