Allen-Bradley 140M-C2E-B40-CX-KY 4A 3-Pole 600 V Circuit Breaker

Engineered for dependable protection in three‑phase power systems, the Allen‑Bradley 140M-C2E-B40-CX-KY 4A 3‑Pole 600 V Circuit Breaker is a compact, rugged solution for safeguarding motors, feeders, and control circuits in demanding industrial environments. With a 4‑amp rating across three poles, this breaker ensures simultaneous disconnection of all phases, reducing the risk of phase imbalance and equipment damage during faults while delivering reliable protection for balanced loads.

Key specifications

• Part number: 140M-C2E-B40-CX-KY
• Current rating: 4 A
• Poles: 3 (three‑pole)
• Voltage rating: 600 V
• Product type: Circuit Breaker

Why this model fits industrial needs

The 140M series from Allen‑Bradley is designed for durable, mission‑critical protection in control panels, switchboards, and machine integrations. The 140M‑C2E‑B40‑CX‑KY configuration delivers coordinated 3‑phase protection, helping prevent electrical faults from propagating through downstream equipment. Its 4 A rating is well suited for smaller three‑phase loads or pilot circuits within larger systems, allowing you to protect sensitive equipment without over‑tripping on normal startup surges.

Ideal use cases

• Protect three‑phase motors and driven loads in small to medium industrial machines and conveyors.
• Guard feeders and control circuits inside electrical panels that power PLCs, drives, and automation components.
• Serve as a reliable replacement in existing 140M panel assemblies where a 4 A, 3‑pole, 600 V protection device is required.

Practical advantages and outcomes

• Two critical protections in one device: consistent triple‑phase interruption and clear fault isolation, improving personnel safety and equipment longevity.
• Compatibility with standard industrial enclosures and control panels that accommodate the 140M family, simplifying upgrade or refurbishment projects.
• Long‑term reliability in environments with frequent switching and moderate fault currents, helping reduce unplanned downtime.

Installation and best practices

When integrating the Allen‑Bradley 140M‑C2E‑B40‑CX‑KY into a system, follow standard electrical safety protocols and the manufacturer’s installation guidelines. Verify that the circuit’s continuous load aligns with the 4 A rating, ensure proper mounting within compatible panels, and coordinate protection with the overall electrical design to maintain safe and predictable operation across all three phases.