Commander QBH50 - 50 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Commander QBH50 is a 50A, 120V, 1-pole bolt-on molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for reliability in demanding environments, it provides precise protection where it matters most—at the point where wiring connects to your electrical system.

Key to its performance is a thermal-magnetic trip unit that delivers stable, repeatable protection. The thermal element responds to gradual overcurrent by heating a bimetallic strip, while the magnetic element provides instantaneous tripping during high-energy fault events. The result is protection you can trust, with clear, predictable response under both nuisance overloads and fast short circuits.

Why this breaker stands out

• Secure bolt-on mounting: A rigid bolt-on connection to the bus minimizes movement and vibration, helping maintain solid electrical contact in panelboards and load centers.
• Thermal-magnetic protection: Combines dependable long-term overload protection with fast short-circuit interruption for enhanced system safety.
• OEM-compatible design: Specifically engineered to be compatible with matching Commander OEM load centers and panelboards, streamlining replacement and upgrades.
• Versatile applications: Suitable for residential, commercial, and light industrial installations that require reliable 1-pole protection on 120V circuits.

Technical specifications at a glance

• Manufacturer: Commander
• Part number: QBH50
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 50A
• Voltage rating: 120V
• Number of poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios and practical considerations

• Install in residential panelboards or load centers where a compact 1-pole 50A breaker is needed for a dedicated branch circuit—such as sub-circuits in kitchens, garages, or outdoor outlets.
• Upgrade or replace aging breakers in panelboards that require a bolt-on solution with a secure, vibration-resistant connection.
• Apply in light commercial setups where reliable 120V protection is required for individual circuits feeding equipment, outlets, or lighting branches.
• Choose this QBH50 when OEM compatibility with your existing Commander-based panel is essential to maintain labeling, trip characteristics, and overall system harmony.

What problems does it solve?

• Prevents electrical damage from sustained overloads and catastrophic short circuits by delivering fast, predictable tripping.
• Reduces maintenance concerns with a durable bolt-on mounting that resists loosening under normal operation and vibration.
• Streamlines compatibility in panel upgrades or replacements by aligning with Commander’s OEM load centers and panelboards.

With the Commander QBH50, you get a purpose-built, dependable solution for protecting individual branch circuits in a variety of settings. Its precise thermal-magnetic trip technology, rugged bolt-on design, and OEM compatibility make it a sensible choice for professionals aiming to maintain safe, compliant, and efficient electrical systems.