ABB S201U-K4 4A 1-Pole 240 V Circuit Breaker Potential Transformer

ABB S201U-K4 is a compact, dependable circuit protection device designed for 240 V single‑pole applications. With a precise 4 A current rating, this breaker provides targeted overload protection for small branch circuits while fitting neatly into standard control panels and metering layouts. The Part Number S201U-K4 ensures clear traceability within ABB’s protection system lineup, making replacements straightforward and inventory management simpler for technicians.

Key features and benefits

• Current rating: 4 A delivers reliable overload protection for low‑load circuits, reducing nuisance trips on sensitive equipment.
• 1‑pole design optimized for single‑phase circuits and compact panel configurations.
• Voltage rating: 240 V compatible with common industrial and commercial power networks.
• Part Number S201U-K4 provides precise specification reference for replacements and service records.
• Potential transformer compatibility designed to work within metering and protection workflows, enabling effective monitoring and coordination with monitoring equipment.

Practical applications

Ideal for panel builders, maintenance engineers, and electrical installers handling small single‑phase circuits in commercial spaces, light manufacturing, and automation environments. Use the ABB S201U-K4 to protect lighting runs, control circuits, and auxiliary loads where space is limited but reliable protection is essential. Its integration-friendly design supports metering setups and protection schemes that rely on potential transformer signals, helping you maintain accurate measurements without compromising safety.

Installation and compatibility

As with all protective devices, installation should be performed by qualified personnel in accordance with local electrical codes and regulations. Ensure the 4 A current rating and 240 V voltage rating align with your panel design and coordination requirements. The S201U-K4 is intended to fit standard mounting and termination practices within ABB‑compatible systems, providing a straightforward replacement path for aging or incompatible single‑pole breakers.

In summary, the ABB S201U-K4 4A 1‑Pole 240 V Circuit Breaker Potential Transformer delivers precise protection for small single‑phase circuits, with practical compatibility for metering and monitoring setups. It’s a reliable, traceable choice for professionals seeking dependable ABB protection in compact installations.