Internet #100075398

Model #QO240CP

Store SKU #577030

Store SO SKU #1000307930

QO 40 Amp 2-Pole Circuit Breaker

  • Designed to protect against overloads and short-circuits
  • Quickly identify tripped breakers with our Visi-Trip indicator
  • Compatible with Square D QO electrical panels, CSED with 2 spaces
  • See More Details

Frequently Bought Together

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Price:
$1999

Product Overview

Square D QO series logo


Compatible with Square D QO Products

QO is the "World's Finest" industry leading offer since 1955, with features engineered for faster installation, reliability and quality.

Square D QO standard breakers use thermal-magnetic breaker technology


Overall Electrical System Protection

Thermal-Magnetic circuit breakers provide overload and short-circuit protection for the entire circuit, including the home run.

Red Visi-Trip indicator light can be found on the front of all Square D QO breakers


Visi-Trip Indicator

Eliminates guesswork and provides faster, easier troubleshooting by indicating which circuit breaker in an electrical panel has tripped.

Find your amperage: QO standard breakers range from 15 to 125 amps


Amperage Range from
15-125 Amps

QO standard circuit breakers are available from
15-125 Amps to fit your electrical needs.

Choose between single-pole, 2-pole and 3-pole QO standard breakers


Single-Pole, 2-Pole, or
3-Pole, 3/4 in. Breakers Available

Designed to save space, taking 3/4 in. per pole space. Use one load center space with single-pole breakers, two spaces with 2-pole breakers, and 3 spaces with
3-pole breakers.

Complete the project: use with Square D circuit breaker accessories


Use with QO Circuit
Breaker Accessories

Handle clamps, ties and padlock attachments are available for use with QO breakers.

The Square D QO 40 Amp 1-1/2 in. Double-Pole Circuit Breaker is compatible with QO load centers, QO enclosures and NQOD panel boards. The breaker features a Visi-Trip indicator to easily identify a tripped circuit in the load center. This circuit breaker has a maximum load of 240-Volt with a 10,000 AIR and uses a thermal-magnetic tripping mechanism.
  • Learn about general NEC 2020 updates. Contact your local building inspector for code adoptions and details.
  • Square D QO 40 Amp two-pole circuit breaker
  • QO 40 Amp two-pole circuit breaker contains a thermal-magnetic tripping mechanism and has a two-pole common trip and the breaker features a visi-trip indicator to easily identify the tripped circuit in the load center
  • Breaker features a visi-trip indicator to easily identify a tripped circuit in the load center this circuit breaker has a maximum load of 240-Volt with a 10,000 AIR and uses a thermal-magnetic tripping mechanism
  • Use for overload and short-circuit protection of your electrical system
  • 2-pole with a common trip
  • Compatible with Square D QO load centers and CSED devices with 2 spaces
  • 10,000 AIR
  • 120/240 VAC
  • ANSI certified and UL Listed
  • Limited lifetime warranty
  • Learn More About Circuit Breakers Here in our Buying Guide.
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Compare Similar Double Pole Breakers

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QO 40 Amp 2-Pole Circuit Breaker
QO 15 Amp 2-Pole Circuit BreakerQO 30 Amp 2-Pole Circuit BreakerQO 45 Amp 2-Pole Circuit Breaker
BrandSquare DSquare DSquare DSquare D
NameQO 40 Amp 2-Pole Circuit BreakerQO 15 Amp 2-Pole Circuit BreakerQO 30 Amp 2-Pole Circuit BreakerQO 45 Amp 2-Pole Circuit Breaker
Price
$1999
$1999
$1999
$2336
Ratings
(690)
(692)
(691)
(690)
Breaker TypeDouble PoleDouble PoleDouble PoleDouble Pole
Interruption TypeStandard TripStandard TripStandard TripStandard Trip
Maximum Amperage (amps)40153045
Pack Size1111
Power Distribution FeaturesTrip IndicatorTrip IndicatorTrip IndicatorTrip Indicator
Mounting TypePlug-OnPlug-OnPlug-OnPlug-On
Product Weight (lb.)0.560.530.550.57
Voltage (volts)120/240120/240120/240120/240
Electrical Product TypeBreakerBreakerBreakerBreaker
View ProductView ProductView ProductView Product

Specifications

Dimensions

Product Depth (in.)
2.92
Product Height (in.)
3.5
Product Width (in.)
1.5

Details

Breaker Type
Double Pole
Electrical Product Type
Breaker
Interruption Type
Standard Trip
Maximum Amperage (amps)
40
Mounting Type
Plug-On
Number of Poles
2
Pack Size
1
Power Distribution Features
Trip Indicator
Product Weight (lb.)
0.56
Returnable
180-Day
Voltage (volts)
120/240

Warranty / Certifications

Certifications and Listings
UL Listed
Manufacturer Warranty
Square D warrants its branch circuit breakers to be free from defects in material and workmanship under normal care and proper usage in a residential installation, for the lifetime of the QO load center in which it is installed.

Questions & Answers

118Questions63Answers

this is for a water heater what would be the wire size to run with this breaker?

Asked by CD45 March 1, 2018
8
Answers

# 10 for short distance. a direct short circuit like heating elements are not so effected by low voltage but electric motors are Ref., A/C, pumps, so the heaver the gauge the better they like it . a universal problem is power lines were put in fifty years ago not everyone had A/C and the modern appliances, pools and where there were 20 homes there are now 400, the lines servicing them are the same old ones so low voltage is a common experience. estimate how many feet from service to outlet. if your Ref. A/C pump motors, audio ,video equipment , ect. are lasting 3 years short lives look for low voltage

I purchased a Kemore stove with a large plug on it. The electrician told me I need to get a squar...

Asked by EJ February 3, 2018
7
Answers

There are 2 different types of Square D breakers. There is a QO and a HOMELINE you will need to know what style your panel box is

I have this to two Honeywell TL8230A1003 Line Volt 240/208 VAC Thermostats each controlling a Cad...

Asked by TryingToDoItRight December 20, 2020
6
Answers

With only have max of 19.8 amps of load the breaker shouldn’t be tripping, so either the breaker is bad or you have some faulty wiring that could be a lose connection or could be shorting intermittently.

can the QO 100 amp 2 pole breaker be used as the main

Asked by steven2001 January 20, 2018
6
Answers

Well “the main” could mean several things, but generally speaking in residential homes the main breaker is for the main panel, of your panel has no main breaker then by placing this breaker on a QO style Square D Electrical panel, with the feeder wires from your meter wired directly to this breaker then this breaker can power the electrical bus with up to 100amps. Usually you would want to buy an electrical panel with a main breaker already installed, Square D Homeline makes some kits with the main breaker for ~$45-$60 so less than this breaker cost I believe. Also currently if it’s your main panel and you are altering it, many areas of the United States require 200amps service for residential homes and anytime you alter your electrical it’s a good idea to bring it up to code or your kind of wasting your money on something that you will be taking out one day.

Is this breaker rated for reverse feed from a generator?

Asked by BackwardsBetty January 26, 2017
6
Answers

Yes, this breaker can be backfed if a main breaker retaining kit is installed.

Does this breaker share a common trip between both poles? The breaker that is in there now has two handles this only one

Asked by Nick September 2, 2020
6
Answers

Hello Nick, We need more information on the first breaker that you have, just to make sure this is the right replacement. You can contact us anytime using our chat live https://www.se.com/us/en/work/support/customer-care/contact-schneider-electric.jsp where an agent will be able to give you further assistance on this matter. Regards, Schneider Electric Customer Care.

Will this accept a #2 gauge wire? I'm installing a 50 amp subpanel in a detached garage. The ga...

Asked by Ted May 26, 2020
6
Answers

Yes, the Square D QO 50A 2-pole breaker will accept from a #8 through a #2 AL or CU conductor.

Is 6/2 wire correct for a 60 amp breaker running an electric furnace

Asked by jjgant December 6, 2018
6
Answers

Depends on what the units nameplate calls for. You are allowed to go 80% so if the unit FLA(Full Load Amps) is 48 ampers or less than a 60 amp breaker with # 6-2 would be the ticket.

can I run a dryer and a furnace on a 220 breaker

Asked by Duane February 27, 2017
6
Answers

Yes if the dryer and furnace run on gas/fuel. This breaker can be used to power any two independent 120V/20A circuits, such as your 2 kitchen receptacle circuits, or a mandatory 20A laundry room circuit and a dedicated circuit for a fuel furnace. However if the circuit requires AFCI, that usually needs to be at the breaker and this breaker won't do. (you cannot use AFCI receps in 99% of cases). Also if one circuit trips, it will knock out the other, which could be inconvenient.

Can this breaker be used for home central air.

Asked by King July 26, 2016
6
Answers

Yes, this breaker is HACR rated.

QO 40 Amp 2-Pole Circuit Breaker - page 2

Customer Reviews

  • 690 Customer Reviews
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97% of customers recommended.
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The city electrical inspector was surprised and impressed I had gotten a GFCI breaker for the sto...
The city electrical inspector was surprised and impressed I had gotten a GFCI breaker for the stove outlet. It made him really happy. It was worth the $129.00 to see how impressed he was which made me happy and I believe helped me to pass the inspection for the new 200 amp service panel from the 100 amp I am currently on.
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THIS BREAKER DOES PROVIDE A LOAD NEUTRAL CONNECTION POINT
SQUARE “D” TYPE QO GFCI CIRCUIT BREAKERS UP TO 50 AMPS DO HAVE A LOAD NEUTRAL CONNECTION POINT ON THE BREAKER. THE 60 AMP VERSION IS AVAILABLE WITH OR WITHOUT A LOAD NEUTRAL CONNECTION POINT. SO IF YOUR HOT TUB REQUIRES A NEUTRAL, THIS IS THE BREAKER FOR YOU. IF YOUR TUB HAPPENS TO REQUIRE 60 AMPS, MAKE SURE YOU ORDER THE ONE WITH THE NEUTRAL CONNECTION POINT.
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I put this breaker in along with a generator interlock kit. It works great, I can run the househ...
I put this breaker in along with a generator interlock kit. It works great, I can run the household necessities on a generator during power outages.
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As described
As described
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Great price, works well.
Great price, works well.
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1
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We used it to connect a customer's solar system to the grid
We used it to connect a customer's solar system to the grid
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Quality breaker
Quality :
5
Value :
5
Chose to go with QO series breakers. The 20A, 2-pole is no exception to the QO series of high quality, positive locking breakers. Secure wire fastening makes for easy installation and replacement. The trip window on the front of the breaker eliminates the need of testers to fins out which breaker is in fault mode.
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Professional Quality 30A Breaker
Quality :
5
Value :
5
Made the decision to use only Square D QO Series circuit breakers. Professional Quality! Robust design you can feel from the moment you pick one up. Firm "snap-in" style to the panel load bar. Large variety of amperage/voltage to fit all my needs. Securely holds the wire and allows for easy replacement with minimal effort. The trip window on the front of the breaker allows me to quickly identify a tripped breaker without need for test equipment.
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