QO240 - 40 Amp Circuit Breaker

QO240 - 40 Amp Circuit Breaker

The QO240 Plug-On Circuit Breaker is a 2-pole, 40-amp thermal-magnetic circuit breaker designed to provide dependable overcurrent and short-circuit protection for compatible 120/240VAC electrical distribution systems. Featuring a convenient plug-on design, the QO240 installs quickly into compatible load centers and panelboards, making it a practical choice for new installations, equipment upgrades, and replacement projects. With a 10kA interrupting capacity at 120/240VAC, this breaker is built to help protect branch circuits serving higher-demand loads while supporting the safe and reliable operation of residential, commercial, and light industrial electrical systems.

Whether you're replacing an existing breaker or completing a new electrical project, the QO240 40 Amp circuit breaker delivers the performance professionals expect. Its compact footprint allows for efficient use of panel space, while the two-pole configuration is ideal for supplying 240-volt equipment or multi-wire branch circuits where applicable. Manufactured to meet industry standards for quality and electrical protection, this breaker is an excellent choice for maintaining the performance and safety of compatible electrical panels.

Key Features and Benefits

• 40 Amp Current Rating: 40 Amp current rating for higher-capacity branch circuits.
• Two-Pole Configuration: Two-pole configuration for 120/240VAC applications.
• Plug-On Design: Plug-on design allows for fast and straightforward installation in compatible panels.
• 10kA Interrupting Capacity: 10kA interrupting capacity at 120/240VAC for dependable fault protection.
• Thermal-Magnetic Trip Mechanism: Thermal-magnetic trip mechanism helps protect against overloads and short circuits.
• Compact Design: Compact design makes efficient use of available panel space.
• Suitable for Multiple Applications: Suitable for replacement, maintenance, and new electrical installations.
  

Technical Specifications

• Part Number: QO240
  
• Type: QO
  
• Circuit Breaker Style: Plug-On
  
• Poles: 2
  
• Amperage: 40 Amps
  
• Voltage Rating: 120/240VAC
  
• Interrupting Capacity (A.I.C.): 10kA @ 120/240VAC
  
• Dimensions:
  • Height: 3.0 in.
  • Width: 1.5 in.
  • Depth: 2.5 in.

Material Compliance and Certifications

• Industry Standards: Manufactured to meet applicable industry standards for molded case circuit breakers.
• Installation Requirements: Designed for use in compatible electrical distribution equipment. Installation should be performed in accordance with the National Electrical Code (NEC), local electrical codes, and manufacturer recommendations.
  

Where It Works Best

• The QO240 2-pole 40 amp plug-on circuit breaker is well suited for a variety of electrical applications, including: Residential load centers, Commercial panelboards, Branch circuits requiring 120/240VAC protection, HVAC equipment, Water heaters, Air compressors, Electric ranges and similar high-demand appliances, General electrical system maintenance and panel upgrades. Before installation, always verify compatibility with the intended electrical panel and confirm that the circuit breaker's voltage, amperage, and interrupting capacity match the requirements of your application.