Square D QOB330VH - 30A, Miniature Circuit Breaker (MCB)

The Square D QOB330VH 30A Miniature Circuit Breaker is a compact, reliable protection device engineered to safeguard your electrical distribution with precision. Designed for use in panelboards, switchboards, control panels, and OEM equipment, this MCB delivers dependable overcurrent protection where it matters most.

Why this 30A MCB stands out

With a 30 ampere current rating, the QOB330VH is purpose-built for protecting feeder circuits, control circuits, and small motor-start applications in both new installations and retrofits. Its miniature circuit breaker form factor fits neatly into standard enclosures, helping you maximize panel density without compromising safety or performance.

Key benefits and use cases

• Industrial reliability: Ideal for distribution panels and motor control centers where consistent fault protection is essential.
• Commercial versatility: Suitable for panelboards and switchboards in office or facility environments that require robust overcurrent protection.
• OEM friendliness: A dependable protection component that can be integrated into engineered equipment and automated systems.
• Easy maintenance: Simple reset after a fault, minimizing downtime and keeping systems up and running.

Who benefits most

engineers and technicians designing or upgrading electrical distribution, OEM equipment builders, and facility managers seeking a trusted, brand-name MCB to protect circuits without complicating layouts.

Practical considerations

• Compatibility: This breaker is part of Square D’s protection lineup and pairs with compatible panelboards, switchboards, and device accessories designed for QOB series installations.
• Protection scope: Use for circuits where a 30A limit is appropriate to prevent insulation damage, overheating, and nuisance trips in connected equipment.
• Installation mindframe: Verify mounting and connector compatibility in your chosen enclosure and ensure the device is appropriately labeled for quick fault isolation.

Choose the Square D QOB330VH when you need a dependable 30A miniature circuit breaker that delivers clear, predictable protection in distribution panels, motor control centers, and OEM assemblies. It’s a practical, proven choice for sustaining safe operation across industrial, commercial, and equipment-manufacturing environments.