ABB S203U-K10 10A 3-Pole 240 V Circuit Breaker

Meet ABB S203U-K10, a compact, reliable 10A, 3-Pole 240 V circuit breaker designed to protect your three-phase electrical circuits from overloads and short circuits. Built to ABB’s standards, this unit delivers consistent performance in demanding commercial and light industrial environments.

Key specifications at a glance

• Current rating: 10 A
• Poles: 3
• Voltage rating: 240 V
• Model: ABB S203U-K10

Why this 3-pole breaker matters for your setup

• Protects 3-phase equipment by disconnecting all three lines together, improving safety and reducing the risk of phase-to-phase faults.
• Ideal for distributing power to smaller three-phase loads where a 10 A protection level is appropriate, such as compact motors, control panels, and coordinated equipment in 240 V systems.
• Part of ABB’s trusted protection lineup, offering dependable trip performance and long service life in real-world installations.

What problems it solves

• Prevent overload damage by interrupting current when loads exceed the 10 A rating.
• Reduce fire risk and equipment wear by quickly isolating faults in a controlled manner.
• Improve maintenance safety with a clearly defined, three-line disconnection in 3-phase circuits.

Who benefits most

• Electrical engineers and installers designing 3-phase distribution in commercial or light industrial settings.
• Panel builders configuring compact machines or control enclosures that run on 240 V with 3-phase power.
• Technicians seeking a proven, durable protective device from a reputable manufacturer.

Practical tips for use

• Confirm your system is a 3-phase 240 V setup and the protected load requires up to 10 A. This breaker is designed to protect those circuits reliably.
• Use in combination with properly rated wiring and enclosure space to maintain safe clearances and serviceability.
• Store spares of the same model (S203U-K10) for quick replacements in ongoing installations or panels.

Designed to deliver dependable protection where three-phase reliability matters, the ABB S203U-K10 10A 3-Pole 240 V circuit breaker is a precise, purpose-built solution for safeguarding your valuable equipment. If your project involves 3-phase distribution at or around 240 V with a 10 A protection target, this unit offers a clear, practical path to safer, more resilient electrical systems.