Square D QBM22150TN - 150 A, 2-Pole Bolt-On Circuit Breaker | AmpState

The Square D QBM22150TN is a rugged 150 A, 2-pole bolt-on molded case circuit breaker designed to shield your electrical system from overcurrent and short-circuit events. Built for dependable performance in panelboards and load centers, this breaker delivers secure, stable protection when it matters most.

Why the QBM22150TN stands out

• Secure bolt-on mounting creates a rigid, vibration-resistant bus connection, reducing movement that can compromise protection and reliability in dynamic electrical environments.
• Thermal-magnetic trip unit provides stable, repeatable protection over a wide range of operating conditions. It responds quickly to short circuits and sustained overloads, helping to minimize damage and downtime.
• OEM-compatible design is engineered to pair with matching OEM load centers and panelboards, helping you avoid compatibility headaches during installation or upgrades.
• Versatile applications suited for residential, commercial, and light industrial settings where reliable branch-circuit protection is essential.

Designed for dependable protection in real-world setups

In everyday electrical layouts, the QBM22150TN acts as the primary defense against damaging faults. The thermal-magnetic trip unit minimizes nuisance trips while still delivering fast interruption during genuine faults, keeping circuits safe without unnecessary downtime. Its molded case construction balances durability with compact form, making it a practical choice for spaces where space and reliability matter.

Technical snapshot

• Manufacturer: Square D
• Part Number: QBM22150TN
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150 A
• Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and installation context

Use the Square D QBM22150TN in panelboards and load centers that demand robust 2-pole protection for 150-amp circuits. It’s well-suited for service upgrades, subpanel feeders, or new installations in residential buildings, small commercial spaces, and light industrial environments where maximum protection with reliable mounting is critical. If your project requires a bolt-on solution that stays securely aligned under vibration and across temperature swings, this breaker is built to deliver.

Practical tips for getting the best results

• Pair this 150 A, 2-pole breaker with compatible OEM load centers and panelboards to ensure seamless electrical compatibility and optimal protection performance.
• Plan for a sturdy panel enclosure and verify that the bolt-on connection remains tight after installation to preserve the vibration-resistant benefit.
• Use in circuits where clear, predictable thermal-magnetic protection reduces the risk of nuisance trips while maintaining rapid response to actual faults.