Square D QOB330VH - 30 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOB330VH is a 30A, 240V, 3-pole bolt-on molded-case circuit breaker designed to deliver dependable branch circuit protection and short-circuit control in panelboards and load centers. Built for durability in real-world electrical environments, it helps keep critical systems safe and energized with confidence.

What makes this breaker stand out

• provides a rigid, vibration-resistant bus connection, reducing the risk of loose connections and arc-related issues in busy electrical panels.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance by responding to both overloads and short circuits with precise behavior tailored to the circuit’s demands.
• is ready to pair with matching OEM load centers and panelboards, ensuring a smooth, trouble-free installation and reliable coordination with existing protection schemes.
• this 3-pole device is suitable for residential, commercial, and light industrial applications where three-phase protection and a compact bolt-on solution are required.

Key specifications at a glance

• Manufacturer: Square D
• Part Number: QOB330VH
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Residential subpanels and main distribution panels that require a robust 3-pole, 30A protection device.
• Commercial load centers supporting lighting, HVAC controls, and equipment circuits where reliable trip performance matters.
• Light industrial panelboards that demand a durable bolt-on breaker with solid bus connection under vibration and varying load conditions.

Installation and compatibility tips

Choose this breaker when your panelboard or load center is designed to accept a bolt-on, 3-pole protection device from the same OEM family. The bolt-on mounting is engineered for a secure connection that stays put in environments with regular vibration or movement. Always verify that the panelboard is rated for 240V systems and that the QOB330VH matches the intended circuit’s amperage and pole requirements. For best results, align protection with the overall electrical design to ensure coordinated tripping and safe shutdown across the entire distribution network.

Why choose the QOB330VH

• Reliable protection with a thermal-magnetic trip that balances sensitivity and selectivity for everyday electrical loads.
• Durable, vibration-resistant installation thanks to secure bolt-on mounting in demanding panel environments.
• Clear compatibility with OEM load centers and panelboards, reducing integration risk and installation time.
• Clear, practical suitability for residential, commercial, and light industrial applications needing solid three-pole protection

Designed for technicians and electrical professionals who value consistent performance, straightforward installation, and proven protection. The QOB330VH delivers peace of mind for branch circuits where dependable, code-compliant overcurrent and short-circuit protection is essential.