Overview
The Allen-Bradley 609TU-BOB /G is a proven NEMA manual motor starter that delivers reliable full-line voltage starting with integrated thermal overload and undervoltage protection. As part of Rockwell Automation’s Bulletin 609TU series, this starter is engineered for applications where manual push-button or toggle control is sufficient, eliminating the need for complex remote control wiring. The open-type construction provides maximum cooling and straightforward installation in general-purpose industrial environments.
Key Features
- Thermal Overload Protection — Prevents motor burnout by automatically disconnecting on sustained overcurrent, extending motor life and reducing downtime
- Undervoltage Protection — Automatically deenergizes the starter during low-voltage conditions, protecting both motor and connected equipment
- Manual Toggle Lever Operation — Simple, direct motor control without requiring external relay logic or programmable controllers
- Full-Line Voltage Starting — Provides consistent, reliable motor acceleration across typical industrial duty cycles
- NEMA Size 0 Construction — Compact form factor suitable for space-constrained panel installations
- Three-Phase, 460-480V Operation — Standard voltage and phase configuration for most industrial motor applications
Technical Specifications
The 609TU-BOB /G meets or exceeds standard NEMA ratings for manual motor control devices, including thermal overload protection and electrical safety certifications. Operating voltage is 460-480V, 60 Hz, three-phase. The device is rated for motors in the 5 HP range typical of NEMA Size 0 applications. The open-type enclosure is designed for surface mounting on control panels or directly in electrical enclosures. Manual reset of thermal overload protection allows operators to quickly restore service after protective events without requiring specialist intervention.
Typical Applications
- Pump motor control and protection in municipal water systems
- Conveyor line starters for manufacturing and material handling
- Fan and blower motor control in HVAC and industrial ventilation
- General-purpose three-phase motor starting in food processing, pharmaceuticals, and heavy machinery environments
- Retrofit and replacement installations in existing control panels
Compatibility & Replacements
The Allen-Bradley 609TU-BOB /G is directly interchangeable with other 609TU variants (such as 609TU-AAB and 609TU-AOB) where the same control voltage and enclosure type are required. As a Rockwell Automation product, it integrates seamlessly with standard NEMA motor control architectures and does not require special software or engineering configuration. Used units are fully field-tested and compatible with original equipment specifications. For applications requiring remote push-button control or advanced logic functions, integration with Allen-Bradley contactors and overload relays is straightforward and widely documented in standard control panel design practices.
