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Siemens Q24040CT2 - 40A Quadplex Miniature Circuit Breaker

Brand Siemens
SKU Q24040
5.0
Rated 5.0 out of 5 stars
4 Reviews
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99

Siemens Q24040CT2 - 40A Quadplex Miniature Circuit Breaker

Brand Siemens
SKU Q24040
5.0
Rated 5.0 out of 5 stars
4 Reviews
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Siemens Q24040CT2 - 40A Quadplex Miniature Circuit Breaker

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$50.67 In stock

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DescriptionSpecificationsSuperClubWarranties
Description
Built to optimize residential panel space, the Siemens Q24040 is a quadplex breaker that provides two independent 40A circuits. By condensing four poles of protection into a two-pole footprint, it allows for system expansion without requiring a larger enclosure upgrade. This plug-on miniature breaker mounts into Siemens EQ, Ultimate, PL, and ES series load centers. It is replaced by the newer Q24040CT2 model. Rated for 10kA at 120/240VAC, it includes common trip functionality for both pairs.

Specifications

Brand Siemens
Series QT
Part Number Q24040
Amperage 40A
Voltage 120/240VAC
Poles 4
Phase 1
AIC Rating 10kA @ 120/240VAC
Special Classification Quadplex
Mounting Style Plug-On
Terminal Type Lugs
For Use With Siemens Load Centers, EQ Load Centers, Ultimate Load Centers, PL Series Load Centers, ES Series Load Centers
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed
Wire Gauge 8-6 AWG (Cu), 8-4 AWG (Al)
Max Wire 6 AWG (Cu), 4 AWG (Al)
Min Wire 8 AWG
Available Options Padlock Attachment
Standards HACR, UL 489
Approval CSA, UL
Temp Rating 40C
Construction Features Space Saver, HACR Rated, Common Trip

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Warranties

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5.0
Rated 5.0 out of 5 stars
Based on 4 reviews
Total 5 star reviews: 4 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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4 reviews
  • JF
    Jesus F.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    7/28/25
    I need AC power

    One of 2 circuits was damaged per corrosion. Installed new CB, fit up was exact and issue was rectified. CB arrived as promised, very reasonably priced and easy to find online.

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  • RC
    Rod C.
    Flag of United States
    I recommend this product
    Rated 5 out of 5 stars
    3/10/21
    It's a contactor...

    Fast delivery. Good packaging. Good description, so I got what I wanted. ...and, they work.

    What more could you ask for?

    ...not to mention SuperBreakers were the only ones to actually have stock, and at a slight to drastic cost reduction depending on who I compared them to.

    Was this helpful?
  • AL
    Alan L.
    Flag of United States
    I recommend this product
    Rated 5 out of 5 stars
    10/21/18
    Hard to Find Breaker

    I had a particularly hard to find breaker, a tandem double pole 40A x 40A.

    Lowes and Menards didn't have them so I went online and Superbreakers showed just what I needed in stock at a very reasonable price too. It's installed. May breaker panel has one slot with a non-tandem breaker remaining. Gee! I wonder if Superbreakers.net has triple-breakers?

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  • JT
    Jonathan T.
    Flag of United States
    I recommend this product
    Rated 5 out of 5 stars
    10/11/17
    Perfect solution to my home charging

    Purchased this for the circuit panel for increasing the space. Worked perfectly.

    Was this helpful?

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