ABB S271 - 5A, 400VAC, Circuit Breaker

Meet the ABB S271—an exacting 5A, 400VAC circuit breaker built for dependable overcurrent protection in modern electrical distribution. It shields wiring and devices from overloads while delivering consistent performance in daily operations.

Strong, purpose-built protection

The S271 is rated for 5A at 400VAC, making it an ideal choice for protecting small- to medium-load circuits in panelboards, switchboards, control panels, and OEM equipment. Its design focuses on safe, predictable operation in industrial and commercial environments where uptime matters.

Where it shines

• Panel integration: Compact form factor and straightforward mounting suit distribution panels and motor control centers.
• Reliable protection: Quick, clean disconnection on fault conditions to prevent damage to downstream equipment.
• OEM compatibility: Ready for use in original equipment manufacturing setups where a compact, dependable breaker is required.
• Versatile applications: Suitable for a range of control circuits, automation panels, and light-to-moderate motor protection tasks.

Ideal use cases

Industry professionals install the ABB S271 in facilities where control panels and distribution panels power automation and machinery. In manufacturing lines, it protects feeder circuits, sensors, and small drives—keeping critical control logic up and safeguarded from overloads.

Why choose ABB S271 over generic breakers

With ABB, you’re choosing a product backed by decades of engineering focus on safety, reliability, and compatibility with standard panel architectures. The S271’s 5A/400VAC rating aligns with common industrial power layouts, helping you meet electrical codes while keeping spare parts widely available for maintenance and repairs.

Practical setup tips

• Verify that your panelboard or switchboard supports 400VAC operation and that the breaker’s current rating matches the protected circuit’s load.
• Install in a clean, dry electrical enclosure and follow applicable electrical codes and safety practices during commissioning.
• Keep a clear spare on hand for quick replacement in OEM equipment or field servicing.