ABB S203-K50 50A 3P 480V Circuit Breaker | AmpState

Introducing the ABB S203-K50, a robust circuit breaker engineered for reliable circuit protection in panelboards, load centers, and electrical distribution networks. Built to support retrofit work and maintenance planning where keeping the exact part number matters, this 50 A, 3-pole device is a practical choice for facilities upgrading or maintaining existing power systems.

Key specifications

• Manufacturer: ABB
• Part number: S203-K50
• Type: Circuit Breaker
• Amperage: 50 A
• Poles: 3
• Voltage rating: 480 V
• Ideal for panelboards, load centers, and electrical distribution applications

Why this S203-K50 stands out

• Three-pole design provides balanced protection for three-phase systems common in industrial and commercial facilities
• 480 V compatibility aligns with higher-voltage distribution in modern electrical setups
• Part-number stability simplifies retrofits and ongoing maintenance, reducing the risk of incompatible replacements
• Availability through AmpState ensures access to authentic ABB components and support for fit confirmation

Practical use cases

Use the ABB S203-K50 when upgrading or maintaining panelboards and load centers that require a consistent ABB part number. This breaker is well-suited for retrofit projects where downtime is minimized and exact part matching is essential, as well as for routine maintenance planning in facilities with three-phase 480 V distribution.

Need help confirming compatibility? Our team can assist with part-number matching and fit verification. Message us and we’ll help ensure the S203-K50 is the right choice for your panel, preventing surprises during installation.

Purchase with confidence

Available from AmpState, a trusted supplier of industrial electrical components. Add the ABB S203-K50 to your cart to secure a reliable, three-pole 480 V protection solution for your electrical distribution network.