Airpax UPG666-1-64-203-C-21 - 20A, 277VAC, Circuit Breaker

Airpax UPG666-1-64-203-C-21 is a dependable 20A, 277VAC circuit breaker designed to protect electrical systems in demanding environments. Built for use in panelboards, switchboards, control panels, and OEM equipment, it delivers reliable overcurrent protection where uptime matters.

Key specifications at a glance:

• Current rating: 20A
• Voltage rating: 277VAC
• Breaker type: Circuit Breaker
• Ideal applications: panelboards, switchboards, control panels, and OEM equipment
• Suitable environments: industrial, commercial, and OEM installations requiring dependable protection in distribution panels and motor control centers

Why this Airpax solution stands out: the 20A at 277VAC specification targets critical circuits in commercial buildings and industrial facilities, including lighting and power distribution, delivering predictable trip behavior and long-term reliability in daily operations. Its design supports safe operation across repetitive on/off cycles, helping protect wiring and downstream components from overloads.

Practical use cases include:

• Protecting feeders and branch circuits in distribution panels in manufacturing floors
• Securing control circuits within machine panels and automation enclosures
• Guarding 277V lighting circuits in commercial facilities to prevent nuisance outages

Installation and maintenance tips: install in accordance with applicable electrical codes and manufacturer guidelines, verify that the voltage and current ratings match your system, and ensure proper enclosure and wiring practices to maintain safe operation over time.