Square D | QOB330VH5237 | Circuit Breaker | 30A | 3-Pole | 240V | Bolt-On

Meet the Square D QOB330VH5237, a genuine 30A, 3-pole circuit breaker designed for bolt-on installation. Built for reliability in maintenance, retrofit, and replacement projects, this device delivers precise protection for 240V circuits while fitting seamlessly into compatible Square D panels.

Key specifications

• Amperage: 30 A
• Poles: 3-Pole
• Voltage: 240 V
• Mounting: Bolt-On
• Part reference: QOB330VH5237

Compatibility note: Confirm fit and ratings before ordering. The part number is the best reference for compatibility with your panel and setup.

Why this breaker stands out

• Precise fit for compatible panels: The QOB bolt-on design is purpose-built for secure mounting in Square D appliances and panels that support this family. When exact fit matters, the QOB330VH5237 delivers dependable alignment with bus bars and mounting hardware.
• Dedicated 30-amp protection: Ideal for safeguarding larger branch circuits, motors, and equipment that run on 240V, providing coordinated protection across all three hot legs.
• Maintenance-friendly replacement: If you’re upgrading, repairing, or retrofitting an older installation, this model offers a straightforward swap with minimal panel disruption.
• Genuine Square D engineering: Count on built-to-spec performance, long-term durability, and compatibility with your existing Square D ecosystem.

Use cases and practical scenarios

• Retrofit or replace aging breakers in 3-phase 240V systems that require a bolt-on 3-pole solution
• Upgrade service panels to maintain consistent protection across all hot conductors
• Protect 30A circuits powering large appliances, industrial equipment, or motors that operate at 240V
• Maintenance cycles where matching part numbers ensure seamless compatibility and minimal downtime

Installation considerations

Before you install, verify that your panel supports bolt-on breakers in the QOB family and that the QOB330VH5237 matches the required amperage, pole count, and voltage. Always de-energize the panel and follow standard electrical safety practices. Use the part number as the primary reference to ensure the exact fit and ratings align with your equipment and electrical design.