140MG-J8E-C60

Overview of Allen Bradley 140MG-J8E-C60

The Allen Bradley 140MG-J8E-C60 is a motor protection circuit breaker designed for reliable performance in industrial environments. Featuring a J frame size and a rated operational current of 60 amps, this breaker provides thermal/magnetic (TMD) protection rated at 35 to 65 kA at 480V. It is factory assembled, ensuring consistent quality and readiness for immediate deployment. The device safeguards motors against overloads and short circuits by combining thermal and magnetic trip elements tailored to motor protection requirements. This model supports one normally open/normally closed auxiliary contact rated at 250V AC/DC, offering enhanced control and monitoring capabilities. Its robust construction and precise breaking capability make it suitable for a wide range of motor control applications.

Key Features of Allen Bradley 140MG-J8E-C60

• Rated operational current of 60 amps suitable for mid-sized motor protection
• J frame size optimized for industrial switchgear applications
• Thermal/magnetic trip unit (TMD) providing both overload and short-circuit protection
• Interrupting capacity of 35 to 65 kA at 480 volts ensuring high fault current interruption
• Factory assembled for guaranteed quality and reliability
• Includes one auxiliary contact (NO/NC) rated 250V AC/DC for control functions
• Compliant with NEMA and UL 489 standards for circuit breakers in North America
• Adjustable trip settings to match motor class and application needs
• Designed to reduce downtime by protecting motors efficiently and preventing damage

Technical Specs of 140MG-J8E-C60

Specification	Detail
Model	140MG-J8E-C60
Frame Size	J Frame
Rated Current	60 A
Interrupting Capacity	35 - 65 kA @ 480V AC
Trip Unit Type	Thermal/Magnetic (TMD)
Auxiliary Contacts	1 NO/NC, 250V AC/DC
Assembly	Factory Assembled
Standards	NEMA, UL 489, CSA C22.2 No. 5

Applications / Use Case

The Allen Bradley 140MG-J8E-C60 motor protection circuit breaker is ideal for protecting three-phase motors in industrial automation, manufacturing plants, and process control systems. Its thermal/magnetic trip unit safeguards motors from damaging overloads and short circuits, making it suitable for pump stations, conveyor systems, and machine tools where motor reliability is critical. The breaker’s adjustable settings allow it to be tailored for different motor classes, ensuring precise protection aligned with operational demands. It is also widely used in control panels and switchgear assemblies, providing dependable motor protection that minimizes downtime and maintenance costs. This model is a practical choice for engineers requiring a proven solution to meet safety and performance standards in motor circuit protection.

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