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Siemens Q240 40-Amp 2 Pole 240-Volt Circuit Breaker

4.6 out of 5 stars 222 customer reviews
| 43 answered questions

Price: $9.47 & FREE Shipping on orders over $49. Details
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40 Amp
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  • 40-Amp
  • 2 Pole
  • Plug in type
  • 2-Inch frame
  • UL listed
40 new from $7.00 10 used from $2.99

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$9.47 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Siemens Q240 40-Amp 2 Pole 240-Volt Circuit Breaker
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  • Siemens Q120 20-Amp 1 Pole 120-Volt Circuit Breaker
Total price: $16.40
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Special Offers and Product Promotions

Size: 40 Amp

Product Description

Size: 40 Amp

Product Description

Siemens plug in circuit breakers are intended for use in Siemens EQ, Siemens Ultimate, ITE, and Gould load centers or meter combinations. The double pole Siemens breakers may be used in 1 or 3-phase load centers and are 240V rated. To ensure the warranty on a Siemens panel is not voided, the use of Siemens breakers is required. Siemens strongly recommends against the use of "used" breakers. The installation of used breakers in a Siemens panel will void the warranty on the panel. Siemens does not sell used breakers and has not approved any 3rd party sellers to do so.

From the Manufacturer

Siemens plug in circuit breakers are intended for use in Siemens EQ, Siemens Ultimate, ITE, and Gould load centers or meter combinations. The double pole Siemens breakers may be used in 1 or 3-phase load centers and are 240V rated. To ensure the warranty on a Siemens panel is not voided, the use of Siemens breakers is required.

Product Information

Size:40 Amp

Technical Details

Part Number Q240
Item Weight 6.4 ounces
Product Dimensions 0.5 x 0.3 x 0.4 inches
California residents Click here for Proposition 65 warning
Item model number Q240
Size 40 Amp
Voltage 240 volts
Item Package Quantity 1
Batteries Included? No
Batteries Required? No
Warranty Description Siemens strongly recommends against the use of "used" breakers.  The installation of used breakers in a Siemens panel will void the warranty on the panel.  Siemens does not sell used breakers and has not approved any 3rd party sellers to do so.

Additional Information

ASIN B00002N5HK
Customer Reviews
4.6 out of 5 stars 222 customer reviews

4.6 out of 5 stars
Best Sellers Rank #13,582 in Home Improvements (See top 100)
#3 in Home Improvement > Electrical > Breakers, Load Centers & Fuses > Circuit Breakers > Ground Fault Circuit Interrupters
#15 in Patio, Lawn & Garden > Generators & Portable Power > Generators
Shipping Weight 6.4 ounces (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available April 6, 2006

Warranty & Support

Warranty, Labor:Full Manufacturer's Warranty

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Size: 60 Amp Verified Purchase
I don't hate it but be aware there are two Revisions of these circuit breakers; one uses a vertical blade [newer Revision] and the other [older R] uses a horizontal snap in place connection to the circuit breaker box; these are not interchangeable and the older version is very likely what you'll be needing...
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Size: 60 Amp Verified Purchase
Recently switched my house's load center out with Siemens gear and added a Siemens Generator-ready panel (check it out - probably cheaper than a transfer switch for portable generators and far more versatile). Anyway, there's no way you can test breakers in your house, so you basically have to trust the company that makes them. This is a company that's been building quality products for over 150 years. When it comes to my money and house, this is a best value. Good pricing from Amazon - better selection than the big box stores. I'll continue buying my Siemens switchgear from Amazon because of that. One note: These are sold as interchangable with other load centers. Siemens doesn't recommend that and the warranty may not be honored if you do use another's breaker in a Siemens panel or vice-versa. Would definitely recommend to friends and family.
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Size: 100 Amp Verified Purchase
quality made and working fine and I expect it to last long long time ,read reviews on Amazon and this rated better than GE brand at great cost and free shipping with amazon prime ,would definetly reccomend to family and friends .
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Size: 50 Amp Verified Purchase
Recently switched my house's load center out with Siemens gear and added a Siemens Generator-ready panel (check it out - probably cheaper than a transfer switch for portable generators and far more versatile). Anyway, there's no way you can test breakers in your house, so you basically have to trust the company that makes them. This is a company that's been building quality products for over 150 years. When it comes to my money and house, this is a best value. Good pricing from Amazon - better selection than the big box stores. I'll continue buying my Siemens switchgear from Amazon because of that. One note: These are sold as interchangable with other load centers. Siemens doesn't recommend that and the warranty may not be honored if you do use another's breaker in a Siemens panel or vice-versa. Would definitely recommend to friends and family.
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Size: 100 Amp Verified Purchase
It’s a good breaker and quality is high. I didn’t have any problem connecting it to my box and it stays in place well. Recently added a tankless hot water heater and needed a sub panel so I ran the wires to that from this breaker in my main box. Flawless integration and a decent price. Lower than the big chains so you save a few dollars.

-- How I rate --
5 Stars: Works exactly as advertised, is a good value at the price point purchased, would buy again or recommend to a friend.
4 Stars: Works exactly as advertised, fit/finish are what you'd expect when purchasing this type of product, might have a minor flaw.
3 Stars: Generally works but it may not be a good value at the price point or might like to see changes / improvements.
2 Stars: Barely works but can be made useful if you try.
1 Star: Useless, does not perform its intended function whatsoever and is generally a waste of money, sending it back.

Overall: I am giving this a five star rating based on my criteria above. It’s a quality product and I expect it to last for years.
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Size: 80 Amp Verified Purchase
Needed this for a sub-circuit to run two ceramic kilns. Home depot didn't carry this size and neither did Lowes but as usual, Amazon not only carried it but it was at a great price and it arrived quickly. We've been running the kilns for a few weeks now and it works great.
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Size: 100 Amp Verified Purchase
My electrician wired in a 100 amp sub panel (with 125amp wire) but couldn't find a 100amp breaker, so he installed a 50amp instead.
Since I paid for 100amp service downstream, I ordered the this 100amp breaker and fixed his corner cutting.
Works well, no complaints. Same quality as you would get from a hardware store (assuming you could find it local, which I could not).
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Size: 35 Amp Verified Purchase
As a rather odd amperage rating I was glad to so easily find this one. Fit in the the Murry panel perfectally. ------As a special note - - Do not use this in Square D Homeline series panels. They will kinda fit, but not properly.
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Siemens Q240 40-Amp 2 Pole 240-Volt Circuit Breaker
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