Overview
The Allen-Bradley 509-BOD is a proven, full-voltage non-reversing motor starter built for reliability in industrial automation and motor control applications. As a NEMA Size 1 contactor, the 509-BOD motor starter provides robust switching and overload protection for three-phase AC motors in the 2–10 HP range. This model features a 27A continuous rating and includes an integral eutectic alloy overload relay, making it suitable for Bulletin 500 motor control centers (MCCs) and standalone control assemblies. The 120V AC control coil operates at 60 Hz and is compatible with standard industrial control voltages.
Key Features
- 3-Pole Non-Reversing Configuration: Provides direct-across-the-line motor starting without reversal capability.
- 27A Continuous Rating: Suitable for motors up to 10 HP at 120V AC supply.
- Integral Overload Relay: Eutectic alloy thermal overload protection built into the starter assembly.
- NEMA Size 1 Package: Compact, open-type design without external enclosure; mounting-ready for panel integration.
- Bulletin 500 Compatible: Designed for use in Allen-Bradley motor control center assemblies.
- Dual-Frequency Coil: 110V at 50 Hz or 120V at 60 Hz operation.
Technical Specifications
- Coil Voltage (60 Hz): 120V AC
- Coil Voltage (50 Hz): 110V AC
- Continuous Current Rating: 27 Amps
- Motor Voltage Range: 115–575V AC, 3-phase
- Horsepower Rating: 2–10 HP (at 120V AC)
- Pole Configuration: 3-pole
- Starter Type: Full-voltage, non-reversing, open construction
- Overload Protection: Eutectic alloy thermal relay (integral)
- Series: Bulletin 509, Series B
- Package Type: Open construction without enclosure
Typical Applications
- Pump and motor control in HVAC systems and water handling applications.
- Fan and blower motor starting in industrial process control.
- General-purpose three-phase motor starting in manufacturing environments.
- Integration into Allen-Bradley Bulletin 500 motor control centers.
- Retrofit and replacement installations where NEMA Size 1 starters are specified.
Compatibility & Replacements
Compatible With
- Allen-Bradley Bulletin 500 motor control centers (MCCs)
- Three-phase industrial power distribution systems (115–575V AC)
- Standard industrial 120V AC control circuits at 60 Hz
- Industrial motor control panels and standalone starting applications
Replaces / Drop-In Replacement For
The 509-BOD Series B is a direct replacement for earlier 509-BOD Series A units and other NEMA Size 1 starters in legacy Bulletin 500 systems. Verify compatibility with your system integrator before ordering.
Works With
- Overload relay modules (eutectic alloy or electronic types, as specified)
- Manual or automated control circuits
- Allen-Bradley auxiliary contact blocks and mechanical interlocks
- Standard three-phase motor wiring and supply configurations
