Square D Y1B115 Circuit Breaker, 15A, 1-Pole, 277V

Meet the Square D Y1B115 Circuit Breaker, a purpose-built solution for industrial electrical service, maintenance, and replacement projects. This 15A, 1-pole unit is part of the 277 Volt Y1B family, designed to protect a single leg of a 277V circuit and keep critical equipment and panels operating safely.

• Manufacturer: Square D
• Series/Voltage: 277V Y1B family
• Part Number: Y1B115
• Amperage: 15 A
• Poles: 1
• Product Type: Circuit Breaker

Why this breaker stands out for industrial settings:

• Built for reliability in industrial service, maintenance, and replacement projects, offering consistent protection on 277V circuits.
• Seamless compatibility within the Square D 277V Y1B series, simplifying part matching when upgrading or expanding existing panels.
• Part-number verification is straightforward: Y1B115 is the key to confirming fit for your application and enclosure design. Verify fit by part number and application requirements to avoid mismatches.
• Clear, concrete protection for a dedicated circuit: 15 amps at 277V helps guard against overloads while supporting reliable operation of connected loads.

Ideal use scenarios

Use the Y1B115 in industrial control panels, service panels, and maintenance scenarios where a single-pole 277V protection device is required. It’s especially well-suited for lighting feeders, control circuits, and other 277V loads in manufacturing facilities, warehouses, and large commercial environments that rely on robust, field-replaceable protection components.

How to ensure the right fit

To avoid compatibility issues, match the part number Y1B115 to your panel’s catalog and the target circuit’s voltage and load. Confirm that the enclosure accommodates a one-pole 277V device in the intended position, and adhere to your local electrical codes during installation.

Need help matching a part number or confirming compatibility? Message us and we’ll help ensure you’re selecting the correct unit for your specific application.