Commander QBH20 - 20 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the Commander QBH20 — a rugged 20A, 120V, 1-pole bolt-on molded case circuit breaker designed to safeguard your electrical system with reliable, repeatable performance. Built for panelboards and load centers, this breaker delivers precise overcurrent protection for residential, commercial, and light industrial circuits.

Why the QBH20 stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact even in environments with motion or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection—responding quickly to short circuits while reducing nuisance trips on minor surges.
• 1-pole, 20A, 120V design targets standard branch circuits such as lighting, outlets, and small appliance runs common in homes and small offices.
• OEM loadcenter compatibility ensures straightforward replacement in matching Commander panels and other compatible panelboards, with fewer compatibility concerns.
• Compact molded-case construction combines reliable protection with space-saving fit in dense electrical panels, helping you maximize panel capacity without sacrificing safety.

Ideal use cases

• Replacing a failed 20A, 120V breaker in residential or light commercial panelboards where a loss of protection could interrupt critical circuits.
• Upgrading aging electrical panels to modern, thermally protected breakers that minimize nuisance trips and enhance long-term reliability.
• New installations in systems requiring a dependable, bolt-on solution that pairs with OEM loadcenters for streamlined maintenance and serviceability.

Technical snapshot

• Manufacturer: Commander
• Part number: QBH20
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 20A
• Voltage rating: 120V
• Number of poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

When you choose the Commander QBH20, you’re selecting a breaker engineered for dependable protection, straightforward compatibility with OEM panelboards, and a design that keeps essential circuits safe from overloads and faults. It’s an intelligent, practical choice for safeguarding electrical systems across a range of environments.