Fuji Electric CP31D - 3A, 1-Pole, Circuit Breaker

Meet the Fuji Electric CP31D — a precise 3 A, 1-Pole circuit breaker designed for dependable overcurrent protection in demanding electrical environments. Built to safeguard wiring and connected equipment, this device fits seamlessly into panelboards, switchboards, and control panels where reliable duty cycle and safe operation matter most.

Why the CP31D stands out

• Exact 3 A protection for low-current circuits such as control gear, instrumentation, PLC power feeds, and signaling lines — helping prevent nuisance trips while guarding against overloads.
• Single-pole design provides targeted protection for a single live conductor, simplifying integration into a variety of enclosure configurations and making wiring layouts cleaner in control panels and MCCs.
• Robust overcurrent protection ensures safe operation in both industrial and commercial settings, reducing the risk of damage from short circuits and abnormal current conditions.
• Versatile applications ideal for distribution panels and motor control centers (MCCs), OEM equipment, and custom control installations where compact, reliable protection is essential.
• Trusted Fuji Electric build quality backed by decades of experience in electrical protection, delivering consistent performance in fluctuating environments.

Ideal use cases

• Control panels for machinery, printers, conveyor systems, and automated lines requiring precise low-current protection.
• Distribution panels that route power to sensitive instrumentation and PLC inputs.
• Motor control centers and switchboards where dependable protection for single-phase circuits is needed.
• OEM equipment enclosures that demand a compact, reliable protective device with straightforward installation.

Technical snapshot

• Current rating: 3 A
• Poles: 1-Pole
• Breaker type: Circuit Breaker

Practical guidance for installation and selection

Choose the CP31D when you require precise overcurrent protection for single-phase, low-current circuits within panelboards, switchboards, or control panels. It’s well-suited for both new builds and retrofits in industrial, commercial, and OEM projects. Ensure the enclosure and mounting arrangement accommodate a 1-pole protective device and that conductors meet the circuit’s rating and wiring guidelines. For engineers and panel builders, the CP31D offers a dependable, straightforward solution that helps you maintain safe electrical operations without overdesigning the protection level.