Square D GB2CB20 Circuit Breaker, 12A, 1-Pole, 277V

Meet the Square D GB2CB20 circuit breaker — a purpose-built, single-pole protection device engineered for industrial electrical service, maintenance, and replacement projects. With a 12 A rating and a 277 V operating voltage, this breaker delivers reliable overcurrent protection exactly where you need it, helping to keep critical equipment and circuits safe in demanding environments.

Designed to integrate with Square D panels, the GB2CB20 is the practical choice when you require a trusted, readily available part that fits your existing system without the guesswork. To ensure you pick the right component for your setup, verify compatibility using the GB2CB20 part number and your application requirements. If you’re unsure, our team can help confirm compatibility before you order.

Key specifications at a glance

• Manufacturer: Square D
• Part Number: GB2CB20
• Product Type: Circuit Breaker
• Amperage: 12 A
• Poles: 1
• Voltage: 277 V

What makes this breaker stand out

• Industrial-grade protection tailored for maintenance, service, and replacement projects in commercial and light industrial settings.
• Part-number clarity GB2CB20 provides a precise cross-reference to ensure you’re selecting the correct device for your panel and circuit needs.
• Reliability you can count on from Square D, a trusted name in electrical protection and distribution equipment.
• streamlined replacement workflow— when a unit goes out, this exact model makes the swap straightforward, minimizing downtime.

Ideal use cases

Perfect for protecting 277 V circuits in warehouses, manufacturing floors, and commercial facilities where quick maintenance and reliable protection are essential. It’s especially useful for replacement projects where you’re upgrading or maintaining existing Square D installations, as well as for routine service work that requires precise, compatible parts.

Compatibility and installation tips

Always verify fit by the exact part number and your application requirements. Use the GB2CB20 part number to confirm compatibility with your panel’s listing and the circuit it protects. If you need assistance confirming compatibility or matching a part number to your setup, message us and we’ll help ensure you get the right component the first time.