1CU20R | Circuit Breaker | 20A | 1-Pole | 277V

1CU20R is a rugged, industrial-grade circuit breaker engineered for reliability in demanding electrical environments. This 20A, 1-pole design is rated for 277V, making it ideal for single-phase commercial circuits and lighting systems where robust protection is essential.

Built for maintenance, retrofit, and replacement projects where exact specifications matter, this breaker helps you keep panels safe with minimal downtime. The part number 1CU20R is the best reference for compatibility—always verify fit and ratings before ordering.

• Single-pole, 277V protection: safeguards a single hot conductor on circuits up to 20A to prevent overloads and short circuits.
• Ideal for retrofit and replacements: an exact match for panels requiring 1-Pole, 277V, 20A protection, streamlining installation.
• Durable for commercial environments: designed to perform reliably in industrial and commercial electrical systems with steady protection for critical loads.

Perfect use cases: routine maintenance on electrical panels, upgrading legacy systems, or replacing worn breakers in commercial facilities where single-phase 277V circuits power lighting, control gear, or auxiliary equipment.

Compatibility and fit: to ensure proper operation, check that your panel labeling indicates 1-Pole, 277V, 20A compatibility and use the 1CU20R as the definitive reference part number.

• Specifications
• Amperage: 20A
• Poles: 1-Pole
• Voltage: 277V

When installing, follow standard electrical safety practices: disconnect power, verify no voltage present, and test the circuit after replacement. With the 1CU20R, you get a straightforward, reliable solution for protecting single-phase loads in commercial and light-industrial settings.