ABB S273 - 3A, 3-Pole, Circuit Breaker

Introducing the ABB S273 — a 3A, 3-Pole Circuit Breaker engineered for reliable overcurrent protection in three-phase power networks. Its 3-pole design ensures balanced protection across all phases, simplifying wiring and boosting reliability for motor starters, drives, and control circuits.

Designed for real-world panel environments, the S273 is well-suited for panelboards, switchboards, and control panels across industrial, commercial, and OEM applications. Whether you’re assembling a distribution panel or a motor control center, this breaker delivers dependable protection and safe operation when safeguards matter most.

• Current rating: 3A
• Poles: 3-Pole
• Breaker type: Circuit Breaker
• Applications: panelboards, switchboards, and control panels in industrial, commercial, and OEM settings
• Protection focus: dependable overcurrent protection for all three phases, helping safeguard wiring and connected equipment

Why the 3-pole design matters: protecting all three legs simultaneously reduces the risk of unbalanced faults that can damage motors and drives. In practical terms, the ABB S273 shines in applications like small-motor loads on conveyors, machine tools, packaging lines, and HVAC control circuits. For OEM builds, it offers a straightforward, cohesive protection solution that fits neatly into compact control panels and distribution layouts.

Compared to single-pole alternatives, this 3-Pole breaker delivers coordinated phase protection, improving protection coordination and uptime in three-phase systems. Built on ABB’s dependable design philosophy, it’s a durable choice for facilities where downtime is costly and safety is non-negotiable.

Practical tips for optimal use: map the S273 into your three-phase protection scheme to ensure consistent trip behavior across all phases, and document its 3A rating within your panel’s protection plan to maintain clear, auditable overcurrent protection. For OEM assemblies, the 3-Pole configuration simplifies wiring schemes and enhances overall protection reliability.