Square D QHB220 - 20 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Square D QHB220 is a purpose-built 20A, 240V, 2-pole bolt-on circuit breaker designed to guard your most essential branch circuits. Built for stability and longevity in panelboards and load centers, this molded case breaker delivers dependable overcurrent and short-circuit protection with a design that’s ready for demanding residential, commercial, and light industrial environments.

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that minimizes loosening and inconsistent trips in busy electrical panels.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining slow-building thermal response with fast magnetic actuation for sudden faults.
• OEM-compatible design works with matching Square D OEM load centers and panelboards, ensuring a cohesive, reliable protection system.
• Versatile applications ideal for residential circuits, light commercial panels, and modest industrial setups that require solid, code-compliant protection.

Technical Specifications

• Manufacturer: Square D
• Part Number: QHB220
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

What makes this breaker stand out

Unlike generic substitutes, the QHB220 is engineered to stay seated under vibration, maintain a solid bus connection, and trip predictably when faults occur. Its 2-pole configuration ensures both hot lines disconnect together, enhancing safety for 240V circuits and preventing partial deenergization scenarios. For installers and facilities managers, this means fewer call-backs and a cleaner protection strategy across panels that rely on consistent performance from key protective devices.

Ideal for

• Upgrading or stocking panels in single- and multi-family dwellings where 240V circuits are common
• Small commercial panelboards serving outlets, lighting, and equipment with reliable, coded protection
• Light industrial environments that require sturdy bolt-on MCCB protection with predictable trip behavior

Tips for use

Ensure compatibility with your existing OEM load centers and panelboards when selecting replacement breakers. The bolt-on mounting style is designed to deliver a strong, vibration-resistant connection—perfect for installations where panels experience regular activity or vibration. Use this 20A, 240V unit for circuits that demand dependable short-circuit protection and protection against sustained overloads, keeping critical systems running smoothly.