General Electric 139C4378G21 575 V Circuit Breaker

General Electric 139C4378G21 575 V Circuit Breaker is a rugged, high-voltage protection device designed to safeguard industrial electrical systems. With the exact part number 139C4378G21 and a 575 V rating, this GE circuit breaker delivers reliable overcurrent protection for feeders, motors, and control circuits in demanding environments.

Why this GE circuit breaker stands out

Rather than a generic protection component, this unit is a genuine General Electric part crafted to integrate seamlessly with GE panels and equipment that require the 139C4378G21 specification. The 575 V rating enables it to handle high-voltage distribution setups, helping to minimize downtime by quickly interrupting fault currents and preventing equipment damage.

• Exact part number match: 139C4378G21 ensures compatibility with GE electrical systems calling for this model.
• High-voltage capacity: 575 V rating suited for commercial and light-industrial distributions.
• Reliable protection: interrupts fault currents to safeguard transformers, cables, and motors.
• OEM integrity: designed to fit GE panels and distribution boards without modification.

Ideal use cases

• Replacing a worn or failing circuit breaker in GE equipment to restore reliable protection for 575 V feeders.
• OEM replacement in industrial control panels that operate at high voltage.
• Retrofits or upgrades for systems requiring the 139C4378G21 part number to maintain compatibility and performance.

How to confirm it’s the right fit

Compare your panel or equipment requirements with the 139C4378G21 model and verify the voltage rating of 575 V. If your GE installation specifies this part number, this breaker is designed to drop into place with minimal effort and maximum reliability.

Tips for installation and maintenance

• Engage a qualified electrician for installation to ensure safe, correct mounting and electrical connections.
• Use appropriate torque and mounting hardware as recommended for GE circuit breakers.
• Store and handle the breaker per GE guidelines to prevent damage before installation.

For engineers and technicians maintaining GE-based electrical distributions, the General Electric 139C4378G21 575 V Circuit Breaker offers a dependable, high-voltage protection solution that aligns with your equipment’s design and performance expectations.