MOTOR PROTECTION CIRCUIT BREAKER – 140MT-C3E-A63

Overview

The Rockwell Automation 140MT-C3E-A63 Motor Protection Circuit Breaker (MPCB) offers a complete, UL/CSA-listed solution for branch-circuit and short-circuit protection. Built for precision and dependability, it safeguards individual motor circuits without the need for additional downstream devices, reducing both wiring and component costs.

Performance and Design

This C-frame breaker provides normal break functionality with adjustable thermal and fixed magnetic trip characteristics, giving users flexibility to fine-tune protection levels for different motor applications. The adjustable thermal trip helps prevent overheating by responding to sustained overloads, while the fixed magnetic trip reacts instantly to short-circuit conditions. Together, these mechanisms ensure safe and reliable operation, even in demanding industrial environments.

Designed for easy integration, the 140MT-C3E-A63 connects seamlessly with Allen-Bradley contactors, soft starters, and overload relays. Its compact size conserves valuable panel space while maintaining the rugged durability that Rockwell Automation products are known for.

Applications

This MPCB excels in motor control centers, automation panels, and industrial machinery that require reliable circuit protection and straightforward maintenance. Because it provides both overload and short-circuit protection, it eliminates the need for separate protective devices, streamlining system design.

In addition, the breaker’s consistent performance and high breaking capacity make it ideal for use in process control systems, conveyor drives, and HVAC equipment, where uptime and safety cannot be compromised.

Key Specifications

• Type: Motor Protection Circuit Breaker

• Frame: C-Frame

• Thermal Trip: Adjustable

• Magnetic Trip: Fixed

• Certification: UL/CSA Listed

• Function: Branch-circuit and short-circuit protection

Conclusion

Compact, configurable, and compliant, the Rockwell Automation 140MT-C3E-A63 delivers the confidence and control needed to keep your motors and your operations running smoothly.