ABB S273-K16A Circuit Breaker, 16A, 3-Pole, 277V

Meet the ABB S273-K16A, a purpose-built circuit breaker for industrial electrical service, maintenance, and replacement projects. With a 16 A rating, three poles, and a 277V operating level, it delivers robust protection for three-phase power systems found in warehouses, manufacturing floors, and large commercial installations.

What makes it unique

• Three-pole design for comprehensive phase protection—guards all three conductors in a three-phase circuit, helping prevent voltage imbalances and fault propagation across the system.
• 277V rating for industrial compatibility—suits common commercial/industrial distribution networks without adapters or workarounds.
• Compact, panel-ready form factor—easy drop-in integration into standard electrical panels used in demanding environments.
• Precisely rated at 16A—provides reliable protection for circuits with moderate current draw while minimizing nuisance trips.

Key specifications

• Manufacturer: ABB
• Part Number: S273-K16A
• Product Type: Circuit Breaker
• Amperage: 16 A
• Poles: 3
• Voltage: 277 V

Why it matters for your project

In industrial service, maintenance, and replacement work, reliable protection from short circuits and overloads is essential to keep equipment safe and uptime high. The S273-K16A is designed for durability in demanding environments, helping protect motors, drives, and distribution circuits and reducing unplanned downtime.

Compatibility and support

Always verify fit by part number and application requirements to ensure correct performance. If you need help matching the S273-K16A to your panel or machine, send us a message — we can confirm compatibility and guide you to the right solution.

Use cases

• New installations in three-phase panels requiring 277V protection
• Panel upgrades or replacements in facilities using ABB-compatible components
• Maintenance projects that require a reliable 16A, 3-pole breaker to safeguard motors, drives, and conveyors