ABB S273-K40A - 40A, Circuit Breaker

Meet the ABB S273-K40A — a precise 40A circuit breaker engineered for reliable overcurrent protection in demanding electrical systems. Built by ABB, this device is designed to quickly interrupt fault currents and safeguard your panelboards, switchboards, control panels, and OEM equipment, helping you maintain safe operation and minimize downtime.

Why choose the S273-K40A?

• 40A current rating tailored for feeders, branch circuits, and motor control centers where consistent protection is critical.
• Versatile integration compatible with standard layouts in panelboards, switchboards, control panels, and OEM installations, making it a practical upgrade or retrofit option.
• Robust protection for demanding environments ideal for industrial and commercial applications where dependable interruption of overcurrent and short-circuit events is essential.
• Reliability you can trust backed by ABB’s long-standing commitment to safety, quality, and electrical protection technology.

Ideal applications

• Industrial floor-scale distribution panels and motor control centers where motors and feeders require solid overcurrent protection.
• Commercial power distribution boards and control cabinets that demand quick fault isolation and safe shutdown.
• OEM equipment assemblies where a proven, compact protection device ensures ongoing performance and safety.

What problem does it solve?

The S273-K40A addresses overcurrent and short-circuit incidents before they cause equipment damage, fire hazards, or unplanned downtime. By providing fast, reliable interruption at the 40A level, it protects wiring insulation, motor starters, and sensitive devices, letting you keep operations running smoothly and safely.

Practical considerations and optimization tips

• Assess load profiles to confirm 40A is the correct protection level for each circuit—avoid undersizing or oversizing to maintain optimal coordination with upstream protection.
• Plan for routine inspection and testing in accordance with your facility’s maintenance schedule to verify trip accuracy and mechanical integrity.
• When replacing older protection devices, confirm compatibility with your panel or switchboard architecture to ensure seamless integration and labeling consistency.

Upgrade your electrical protection with the ABB S273-K40A to secure dependable overcurrent protection across panelboards, switchboards, control panels, and OEM equipment. Built for industrial reliability and commercial resilience, this 40A circuit breaker supports safer, more efficient distribution panels and motor control centers wherever robust protection is required.