Q40 - 40Amp Circuit Breaker

Q40 - 40Amp Circuit Breaker

The Q40 40 amp circuit breaker is a practical solution for protecting 120-volt branch circuits in residential and light commercial electrical systems. It’s a single-pole breaker rated for 40 amps, designed to trip when a circuit is overloaded or a fault occurs, helping reduce the chance of wiring damage or equipment failure. With a 10,000 AIC interrupting rating, it’s capable of safely handling short-circuit conditions commonly found in everyday electrical installations.

This breaker uses a Q-frame design with a plug-on connection, so it seats easily into compatible panels without extra steps or special tools. Electricians often choose it for replacements and service work because it installs cleanly and performs consistently once in place. It’s straightforward, dependable, and built for real-world use—not overengineered, not complicated.

Key Features and Benefits

• 40 amp rating for higher-load branch circuits
• Single-pole configuration for standard 120V applications
• Plug-on style helps speed up installation and servicing
• Designed for steady, reliable operation in typical electrical environments

Technical Specifications

• Poles: 1
  
• Frame Type: Q
  
• Amperage: 40A
  
• Voltage Rating: 120 VAC
  
• Interrupting Capacity: 10 kA
  
• Dimensions:
  • Width: 0.75 inches
  • Length: 4.81 inches
  • Depth: 2.50 inches
• Approximate Weight: 1.75 lbs
  

Material Compliance and Certifications

• The Q40 circuit breaker is manufactured using quality materials intended for long-term use in electrical distribution systems.
• It is built to meet applicable industry safety and performance standards, helping support code-compliant installations and dependable operation over time.

Where It Works Best

• This breaker is commonly used for maintenance, panel servicing, and replacement applications in homes, small commercial buildings, and light industrial settings.
• It’s a good fit when a reliable 40 amp, single-pole breaker is needed and ease of installation matters.