A-B 140MG-J8P-D25 Motor Circuit Protector

Product Description

The Allen-Bradley 140MG-J8P-D25 Motor Circuit Protector (MCP) is a magnetic-only motor protection circuit breaker manufactured by Rockwell Automation (Allen-Bradley). It belongs to the 140MG series and is designed to provide short-circuit protection and disconnect capability for motor branch circuits and industrial motor control applications.

The device features a J-frame design, 250 A rated current, and adjustable magnetic trip protection. It is commonly used with contactors and overload relays in motor starter assemblies to provide reliable protection for industrial motors.

Detailed Specifications

Advantages & Features

• Provides high-level short-circuit protection for motor circuits
• Adjustable magnetic trip setting for application flexibility
• 250 A rated current capacity
• Compact J-frame motor protection design
• High interrupting capacity up to 65 kA at 480 VAC
• Suitable for motor control centers and industrial panels
• Compatible with Allen-Bradley motor starter systems
• Helps improve equipment safety and reduce downtime

Applications

• Industrial Motor Control Panels
• Factory Automation Equipment
• Motor Control Centers (MCC)
• Pumps and Fans
• Conveyors
• Machine Tools
• Production Line Equipment
• Industrial Power Distribution Systems

Precautions

• This model is a Motor Circuit Protector (magnetic-only) and does not provide thermal overload protection.
• Usually used together with a contactor and overload relay for complete motor protection.
• Verify motor full-load current before setting the magnetic trip value.
• Confirm voltage, current rating, and short-circuit requirements before installation.
• Installation should follow electrical safety standards and local regulations.