QB20 - 20 Amp Circuit Breaker

QB20 - 20 Amp Circuit Breaker

The QB20 is a standard 20 amp, single-pole circuit breaker made for 120 volt systems. It’s commonly used when replacing a failed breaker or adding a new branch circuit in residential and small commercial panels. This breaker is rated at 10,000 AIC, which is more than enough for most everyday applications where short circuits or overloads need to be cleared quickly and safely. The bolt-on mounting helps keep the connection tight, reducing the chance of loose contacts over time. If you’re looking for a simple, dependable breaker that fits where a QB frame is required, this one checks the box.

Key Features and Benefits

• 20 amp rating for standard branch circuits
• Designed for 120 VAC electrical systems
• 10,000 AIC interrupting rating for typical fault conditions
• Bolt-on style for a secure, steady connection
• Single-pole design that fits most common panel layouts

Technical Specifications

• Amperage: 20 Amps
• Number of Poles: Single
• Voltage Rating: 120 VAC
• Interrupting Capacity: 10 kA
• Frame Type: QB
• Mounting Style: Bolt-on
• Dimensions:
  • Width: 0.75 in
  • Length: 4.81 in
  • Depth: 2.50 in
• Approximate Weight: 1.75 lbs

Material Compliance and Certifications

• This circuit breaker is built using materials intended for regular, long-term electrical use. It meets applicable UL and CSA standards for overcurrent protection, helping support safe installations that align with common electrical code requirements.

Where It Works Best

• The QB20 is typically used in residential service panels, small commercial buildings, and light industrial settings. It works well for lighting circuits, receptacles, HVAC equipment, and other general-purpose loads that require 20 amp protection. Its compact, single-pole format also makes it a practical choice when space in the panel is limited or when replacing an existing breaker.