ABB S203U-K20 Circuit Breaker, 20A, 3-Pole, 240V

The ABB S203U-K20 is a purpose-built circuit breaker designed for demanding industrial environments where reliable protection and quick, clean disconnection are essential. With a 20 A rating and a 3-pole design at 240 V, this unit is crafted to safeguard 3-phase power circuits, motor feeders, and control panels in manufacturing, processing, and utilities applications.

Why the S203U-K20 stands out

• Three-pole protection for 3-phase systems: Simultaneous interruption of all three conductors provides safe, reliable isolation for industrial 3-phase loads.
• Compact 20 A rating: Perfect for protecting moderate-draw feeders and motor circuits without unnecessary tripping.
• 240 V operation: Suited to standard industrial distribution environments that run three-phase 240 V power.
• Verified part number compatibility: Fit and application should be confirmed by part number S203U-K20 and your panel’s requirements.
• Ready for maintenance and replacement projects: A dependable choice for service panels, upgrades, or scheduled replacements in industrial facilities.

Ideal use cases

• Replacing worn or failed breakers in industrial control panels and distribution boards.
• Protecting feeders that power motors, conveyors, fans, and other three-phase equipment in manufacturing lines.
• Upgrading legacy panels to maintain consistent protective performance in ongoing maintenance programs.

How to ensure the right fit

Before purchasing, verify fit by the part number and your application requirements. If you’re unsure about compatibility with your specific panel or equipment, reach out and we’ll guide you to the correct match using the S203U-K20 designation and your system details.

Key specifications

• Part Number: S203U-K20
• Amperage: 20 A
• Poles: 3
• Voltage: 240 V

Designed for professional installers and maintenance teams, this ABB circuit breaker delivers predictable performance and straightforward replacement logistics. For best results, confirm exact compatibility with your panel and load requirements using the S203U-K20 part number, and feel free to message us for personalized assistance with matching this breaker to your electrical system.