MOTOR PROTECTION CIRCUIT BREAKER – 140MT-C3E-B40

Overview

The Rockwell Automation 140MT-C3E-B40 Motor Protection Circuit Breaker delivers efficient, reliable, and adaptable motor protection for modern industrial systems. It is UL and CSA listed, ensuring compliance with international safety standards and reducing the need for additional protective devices.

Moreover, it provides branch-circuit and short-circuit protection for individual motor circuits. Therefore, engineers can confidently safeguard their systems without extra upstream protection, simplifying installations and saving space.

Performance and Design

Engineered with precision, this breaker combines an adjustable thermal trip and a fixed magnetic trip, ensuring balanced protection under both sustained and instantaneous fault conditions. The thermal element responds to overloads to prevent overheating, while the magnetic element instantly interrupts short-circuit currents. This intelligent dual protection ensures secure operations and safeguards equipment from damage.

Its C-frame design makes it compact yet durable, saving valuable panel space without compromising on strength. The normal break configuration ensures quick, reliable disconnection under fault conditions. Built to perform consistently, the 140MT-C3E-B40 integrates seamlessly into Allen-Bradley motor control assemblies, providing users with a cohesive and reliable protection solution across their systems.

Applications

Ideal for a range of industries, this MPCB supports motor control panels, automation systems, and process machinery. Its rugged design and high breaking capacity make it well-suited for manufacturing, packaging, and HVAC environments, where downtime must be minimised, and safety must be absolute.

Because it provides both overload and short-circuit protection, engineers can simplify their control architecture while maintaining compliance with global safety standards.

Key Specifications

• Type: Motor Protection Circuit Breaker

• Frame: C-Frame

• Operation: Normal Break

• Trip Type: Adjustable Thermal / Fixed Magnetic

• Certifications: UL, CSA Listed

Conclusion

With its proven reliability, flexible protection range, and compact footprint, the 140MT-C3E-B40 stands as a smart and secure choice for modern motor control applications.