ABB S201-K40 40A 1P 277V Circuit Breaker | AmpState

ABB S201-K40 40A 1P 277V Circuit Breaker is a compact, dependable overcurrent protection device designed for panelboards, load centers, and electrical distribution systems. With a precise 40-amp rating and a single-pole design for 277V operation, this breaker delivers reliable protection where it matters most—keeping circuits safe and downtime minimal.

• Amperage: 40 A
• Poles: 1
• Voltage: 277V
• Part Number: S201-K40
• Brand: ABB
• Type: Circuit Breaker

This model is a smart direct-part-number match for ABB S201-K40, making it an ideal choice for maintenance teams, panel builders, and spare-inventory stock where exact fit and labeling matter. The clear, unambiguous part number reduces substitution errors and accelerates project timelines, from new installations to routine replacements.

Why this matters in real-world scenarios

• Commercial and light-industrial panels operating at 277V often require precise 1P protection to avoid nuisance trips and ensure coordinated protection with other circuit devices.
• Exact part-number compatibility minimizes commissioning time, especially in retrofits or multi-vendor panel configurations.
• Keeping a labeled spare of the ABB S201-K40 helps maintenance crews respond quickly to faults, reducing downtime and service interruptions.

Ideal use cases

• Panelboards and distribution panels in office complexes, retail spaces, and data-adjacent environments with 277V single-phase circuits.
• Replacement parts inventories for service teams that require dependable ABB components with documented part numbers.
• New construction projects where exact-match breakers streamline installation and future servicing.

How it compares to alternatives

• Unlike generic substitutes, the S201-K40 offers an exact 1P, 277V specification with a known trip curve and labeling. This reduces misfits, miswirings, and compatibility concerns across panel ecosystems.
• As an ABB product, it benefits from established performance characteristics and compatibility with ABB-compatible panels and accessories, supporting consistent protection across installations.

Availability and support

This item is available from AmpState. If you’re unsure about fit, we’re ready to help confirm compatibility—send a note and we’ll verify the exact part-number match for your panel or distribution setup.

Keep the power flowing with confidence—the ABB S201-K40 40A 1P 277V Circuit Breaker aligns precise protection with reliable performance, backed by straightforward inventory management for maintenance teams, panel builders, and service professionals.