Allen-Bradley 140MT-C3E-B40 Circuit Breaker, 4A, 3-Pole, 480V

Engineered by Allen-Bradley, the 140MT-C3E-B40 circuit breaker delivers compact, reliable protection for three-phase systems at 480V. With a 4 A continuous rating and three poles, it is a precise choice for safeguarding motor feeders, control circuits, and other 3-phase loads in demanding industrial environments.

Designed specifically for service, maintenance, and replacement projects, this breaker integrates seamlessly with the Allen-Bradley 140MT family. Use the part number to confirm compatibility for your application. Key specs at a glance: 4 A, 3 poles, 480V, and a rugged industrial build designed to endure the realities of factory floors and switchgear cabinets.

• Three-pole protection: All three phases are protected consistently, improving system reliability and reducing the risk of unbalanced loads.
• 4 A rating for targeted protection: Ideal for smaller motor starts, control circuits, and light-to-moderate demand loads within a 480V network.
• Industrial-grade compatibility: Engineered to perform in demanding environments, with fit and form designed to work within the 140MT series panels and enclosures.
• Part-number-driven compatibility: Validates fit and function with your existing panel schedule by verifying 140MT-C3E-B40 against your application requirements.
• OEM reliability: Backed by Allen-Bradley’s engineering and quality standards, ensuring consistent trip characteristics and dependable protection across replacements and upgrades.

Practical use cases include upgrading older MCCB setups in 3-phase 480V distribution boards, replacing failed breakers in manufacturing lines, and provisioning new equipment fed from 480V service with reliable protection. If you’re unsure about fit, remember to check the part number against your panel documentation and application needs. Need help matching a part number or confirming compatibility? Message us and we’ll help.