Square D BR240 2-pole 40A Plug-on Circuit Breaker

Product Description

The SQUARE D BR240 is a 2-pole, 40-amp plug-on circuit breaker rated for 120/240 volts AC and designed for use in BR Series load centers. It carries a 10 kiloamp interrupting rating and features common-trip operation, which simultaneously disconnects both poles under fault conditions. Accepted wire sizes range from 14 to 4 AWG for both copper and aluminum conductors. Licensed electricians install this breaker during new construction panel builds, panel upgrades, and branch circuit replacements where a double-pole 40-amp overcurrent device is required.

This breaker is suited for residential and light commercial applications where a BR Series load center is already installed. Typical branch circuits served by a 40-amp double-pole breaker include electric ranges, HVAC disconnect feeds, water heaters, and EV charging receptacles. The plug-on mounting style seats directly onto the load center bus bar without tools, simplifying installation during panel work.

Key Features

• 2-pole common-trip design interrupts both legs simultaneously on overcurrent or fault
• 40-amp current rating for higher-load branch circuits
• 10 kA interrupting rating for fault current protection
• Plug-on mounting for tool-free bus bar engagement in BR Series panels
• Accepts 14 to 4 AWG copper or aluminum conductors
• UL 489 listed for branch circuit overcurrent protection

Compatibility

Designed for use in BR Series load centers as stated by the manufacturer. Verify load center compatibility before installation.

Installation Notes

Installation must be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. Always shut off the main breaker and verify the panel is de-energized before handling bus bars or installing breakers. Confirm conductor wire gauge and material match the breaker terminal ratings prior to torquing connections. Do not install in panels or enclosures for which this breaker is not rated.

Technical Specifications

• Voltage Rating: 120/240 volts AC
• Current Rating: 40 amps
• Number of Poles: 2
• Interrupting Rating: 10 kiloamps
• Trip Type: Common Trip
• Mounting: Plug-On
• Wire Size: 14 to 4 AWG (Copper or Aluminum)
• Length: 1.9 inches
• Width: 2.9 inches
• Height: 2.5 inches
• Approval: UL 489
• Used On: BR Series Load Center

Standard Information

• Brand: SQUARE D
• Manufacturer Part Number: BR240