ABB S203-C10 10A 3-Pole 480 V Circuit Breaker Potential Transformer

Introducing the ABB S203-C10, a robust 3-pole circuit breaker designed for 480 V three-phase power systems. With a precise 10 A current rating, this device delivers dependable overcurrent protection for motors, pumps, transformers, and other critical equipment in industrial and commercial panels. Built on ABB’s engineering heritage, the S203-C10 prioritizes reliable trip performance, a compact footprint, and smooth integration into existing protection schemes.

Designed to work in harmony with protection and metering setups that utilize potential transformers, this breaker can be paired with PT-based sensing to support accurate fault detection and signaling. This alignment helps minimize unnecessary interruptions while ensuring fast isolation when faults occur, contributing to steadier operations and reduced wear on equipment.

Key specifications

• Part number: S203-C10
• Current rating: 10 A
• Poles: 3
• Voltage rating: 480 V
• Type: 3-pole circuit breaker for three-phase protection

Why this 3-pole solution stands out

Three-pole protection ensures synchronized interruption of all phases, reducing the risk of phase imbalances that can damage loads and disrupt performance. The ABB S203-C10 is engineered for durability in demanding environments, offering a reliable, space-efficient solution for panel boards in manufacturing facilities, data centers, and building services. Its design supports long service life and predictable operation, which translates into fewer maintenance events and clearer protection coordination.

Ideal use cases

• Protection for three-phase motors, conveyors, pumps, fans, and compressors in industrial settings
• Distribution protection for transformers and feeder circuits in commercial facilities
• retrofit or new-install projects requiring a dependable 480 V, 3-pole breaker
• Systems that integrate potential-transformer-based protection and metering for accurate fault detection

Installation and maintenance tips

• Confirm compatibility with your panelboard and follow terminal torque specifications during installation
• Coordinate with PT-based protection schemes to ensure precise sensing and timely tripping
• Regularly inspect wiring and monitor for signs of overheating or wear in the breaker mechanism