Q140 - 40Amp Circuit Breaker

Q140 - 40Amp Circuit Breaker

The Q140 circuit breaker is a 40-Amp, single-pole Type QP breaker made for use in compatible 120 VAC electrical systems. It has a 10kA AIC rating at 120VAC and a plug-in design, so it's a practical option when you're replacing a matching breaker or working with equipment that specifically calls for this configuration. The Q140 is also HACR-rated, which makes it suitable for qualifying heating, air-conditioning, and refrigeration applications. And because it measures only 1 inch wide, it keeps the familiar, compact footprint expected from a single-pole breaker. If you already have a Q140 and need to match its basic specifications, the key numbers are easy to check: 40 amps, 1 pole, 120 VAC, 10 kA AIC, and Type QP. Just be sure to confirm that the breaker type is approved for your specific panel before installation.

Key Features and Benefits

• 40-Amp, 1-pole design for compatible 120 VAC circuit applications.
• 10kA AIC rating at 120VAC provides the specified short-circuit interrupting capacity.
• Type QP configuration for equipment specifically designed and approved for this breaker type.
• Plug-in connection makes installation straightforward in a compatible panel or load center.
• At only 1 inch wide, the Q140 takes up minimal panel space.
• HACR-rated for qualifying heating, air-conditioning, and refrigeration equipment.
• 40°C rated for its specified application.
• Clearly defined ratings make it easier to compare against an existing Q140 when selecting a replacement.

Technical Specifications

• Part Number: Q140
  
• Type: QP
  
• Amperage: 40A
  
• Poles: 1
  
• Voltage: 120VAC
  
• A.I.C. Rating: 10kA at 120VAC
  
• Mounting: Plug-In
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Height: 2.88 in.
  
• Width: 1.00 in.
  
• Depth: 2.56 in.
  

Material Compliance and Certifications

• The Q140 is HACR rated, allowing it to be used in qualifying heating, air-conditioning, and refrigeration applications where this breaker type and rating are specified.
• The Q140 is also identified under the UL 489 standard for molded-case circuit breakers, molded-case switches, and circuit-breaker enclosures.
• Breaker compatibility shouldn't be determined by size or appearance alone. Check the panel documentation and electrical requirements before installation to make sure the QP breaker type, amperage, voltage, pole configuration, and interrupting rating are appropriate for the application.

Where It Works Best

• The Q140 40 Amp breaker works best in compatible residential or light commercial electrical equipment that calls for a 40A, single-pole, Type QP plug-in circuit breaker. Its HACR rating also makes it a consideration for qualifying HVAC and refrigeration equipment when the system specifications require it.
• For replacement work, start with the information on the breaker you're removing. If you're matching a Q140, check the part number along with the 40 Amp rating, single-pole configuration, 120VAC rating, 10kA AIC, and Type QP designation. Those details are much more useful than simply choosing a breaker that appears to have the same dimensions.
• In short, the Q140 is a compact, straightforward breaker for applications that require its specific ratings. Match the specs, confirm panel compatibility, and you'll know whether the Q140 is the right fit for the job.