Schneider Electric STR58U 4000 Amp Air Circuit Breaker For Low Voltage Power Distribution

Schneider Electric STR58U 4000A Air Circuit Breaker is a heavy-duty protection and switching solution built for demanding low-voltage power distribution in industrial and commercial facilities. Designed to endure harsh operating conditions, this air circuit breaker delivers reliable performance for critical distribution paths, helping prevent outages and protect downstream equipment.

Why the STR58U stands out

• 4000 A current rating — confidently handles high fault currents on main feeders and large switchboards, providing robust protection for substantial LV distribution networks.
• Adjustable trip settings — enables precise protection coordination with downstream devices, reducing the risk of unnecessary trips while maintaining fast response to faults.
• High interruption capacity — fast, secure interruption of faults to safeguard equipment, data paths, and personnel in demanding environments.
• Rugged air circuit breaker design — engineered for reliability in industrial and commercial settings where continuous operation and durability matter.
• Ideal for main incoming feeders and switchboards — a strategic choice for central power distribution where dependable protection is essential.

Key specifications

• Model / Part Number: STR58U
• Current Rating: 4000A
• Breaker Type: Air Circuit Breaker

Practical use cases

Use the STR58U as the cornerstone of your low-voltage distribution system in large facilities. It’s well-suited for main incoming feeders and switchboards in industrial plants, shopping centers, office campuses, and other facilities with high power demands. The adjustable trip functionality supports coordinated protection strategies, ensuring fast isolation of faults without unnecessarily triggering upstream equipment. Whether you’re upgrading legacy gear or designing a new distribution scheme, this breaker provides the reliability and control needed for continuous operation.

Choosing the STR58U means opting for a proven Schneider Electric solution that integrates smoothly with a broad spectrum of LV protection devices, helping you build a safe, scalable, and resilient power distribution network.