Overview
The Allen-Bradley 140-MN-0250 /C motor starter protector is a proven manual motor control device engineered for industrial automation and general-purpose motor protection. This 3-pole starter delivers overload protection with adjustable current settings from 1.6 to 2.5A, making it suitable for small to medium-sized motors in manufacturing, assembly, and control panel applications. The 140-MN-0250 is a legacy component from the 140 Series starters and provides direct motor circuit protection via thermal overload detection.
Key Features
- 3-Pole Configuration: Three-pole design for balanced motor protection across all phases
- Adjustable Current Range: Selectable 1.6–2.5A rating for flexible motor sizing
- Instantaneous Protection: 28A instantaneous trip current prevents nuisance shutdowns while protecting against phase failures
- DIN Rail Mounting: Standard rail-mount form factor for compact control panel integration
- Manual Operation: Hand-operated toggle control for direct motor start/stop without auxiliary control circuits
- Proven Design: Decades of field reliability in legacy industrial systems
Technical Specifications
- Current Rating (Motor): 1.6–2.5A adjustable
- Voltage: 600V three-phase
- Poles: 3
- Frequency: 50/60 Hz
- Instantaneous Trip: 28A
- Full Load Amperage (Max): 2.5A
- Mounting Type: DIN rail
- Series: 140 Series
- Condition: Used, factory tested
Typical Applications
- Small fractional-horsepower motor control in production machines
- Pump and fan motor protection in HVAC and process systems
- Legacy control panel retrofits where direct manual starters are still in use
- OEM replacement for existing 140 Series starter installations
- Maintenance and troubleshooting of vintage industrial equipment
Compatibility & Replacements
Compatible With
- Allen-Bradley 140 Series manual motor starters and overload blocks
- Standard 600V three-phase industrial power systems
- DIN rail control enclosures and terminal blocks
- Direct motor load circuits (no auxiliary voltage required)
Replaces / Drop-In Replacement For
- 140-MN-0250 Series A, Series B units (backward compatible 3-pole configuration)
- Other 1.6–2.5A adjustable thermal overload modules in legacy 140-class designs
- Verify model compatibility with your system integrator before ordering
Works With
- Manual motor starter enclosures and motor control center (MCC) installations
- Thermal overload detection systems (no PLC or digital control required)
- Hand-operated contactor and disconnect combinations
- Standard industrial 600V three-phase motor circuits
