Commander QBH290 - 90 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Commander QBH290 is a 90A, 240V, 2-pole bolt-on molded case circuit breaker designed to deliver reliable branch-circuit protection for panelboards and load centers. Built to stand up to everyday electrical demands, it combines robust construction with precise protection to keep circuits safe and interruptions minimal.

Why the QBH290 stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection. In panels that experience movement or vibration, this design reduces loosening and maintains dependable protection where it matters most.
• Thermal-magnetic trip unit delivers stable and repeatable protection performance across a range of loads and temperatures, helping prevent nuisance trips while still responding quickly to overcurrent or short circuits.
• OEM-compatible design is made to match with corresponding Commander OEM load centers and panelboards, ensuring a smooth upgrade or retrofit without compatibility headaches.
• Versatile for multiple environments—suitable for residential, commercial, and light industrial applications where strong protection of branch circuits is essential.
• Durable molded-case construction offers long-lasting reliability in demanding electrical installations, with a sturdy form factor designed for easy field servicing.

The QBH290 protects both conductors in a 240V circuit, interrupting power on fault to prevent damage to wiring and connected equipment. With a 90A rating, it’s well-suited for higher-demand feeders and circuits that power heavy appliances, multi-outlet kitchen layouts, or motor-driven loads in light commercial settings.

Technical snapshot

• Manufacturer: Commander
• Part Number: QBH290
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 90A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Upgrading residential panelboards to safely feed high-demand circuits (e.g., dedicated appliance circuits, multi- receptacle areas) with secure, vibration-resistant mounting.
• Installing or expanding commercial load centers where reliable protection for lighting and power distribution is critical.
• Light industrial applications requiring robust, dependable two-pole protection for feeders and motor circuits.

Practical installation and care tips

• Ensure the breaker is compatible with the specific panelboard model you’re using; confirm OEM compatibility to maintain coordinated protection and warranty alignment.
• Follow the panelboard manufacturer’s torque specifications for bolt-on connections to maintain a secure bus contact and proper trip operation.
• Verify the breaker is firmly seated and locked into the bus before energizing the circuit. Regularly inspect for signs of wear or loosening in high-vibration environments.
• Keep this unit as part of a routine electrical maintenance plan, testing trip functionality in a controlled manner per local codes and safety guidelines.

With the Commander QBH290, you’re choosing a purpose-built solution for dependable overcurrent and short-circuit protection. Its bolt-on rigidity, thermal-magnetic reliability, and OEM compatibility translate to safer panels, fewer interruptions, and a smoother path to compliant, long-lasting electrical systems.