Square D QO Tandem Circuit Bre...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$49.27
Square D QO Tandem Circuit Breaker, 120/240VAC, 10kA

Square D QO Tandem Circuit Breaker, 120/240VAC, 10kA

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Model: QOT1515

In Stock (leaves warehouse same day if ordered before 3pm ET)

$49.27
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Square D QO Tandem Circuit Breaker, 120/240VAC, 10kA

The Square D QO Tandem Circuit Breaker delivers dependable overcurrent protection and switching for residential and light commercial ac systems. Configured as a 2 x 1 pole tandem breaker rated 15A, this QO-range thermal magnetic breaker operates at 120/240 V AC with a 10 kA interrupt rating, letting you add circuits in existing panel spaces without sacrificing protection. Built with an over-center, trip-free toggle mechanism for quick-make, quick-break action, it is UL Listed and CSA certified for code-compliant installations.

Key Features

  • Tandem Configuration: 2 x 1 pole design rated at 15A for adding circuits within a single breaker space.
  • Voltage Rating: 120/240 V AC for standard residential and light commercial branch circuits.
  • Interrupt Rating: 10 kA at 120/240 V AC, 50/60 Hz for reliable fault clearing.
  • Trip-Free Toggle Mechanism: Over-center design with quick-make, quick-break action and positive trip indication.
  • Wire Compatibility: Accepts AWG 14 to AWG 8 copper conductors and AWG 12 to AWG 8 aluminum conductors.
  • Mounting: Plug-in style for fast installation into compatible QO load centers and panelboards.
  • Space-Saving: Requires only 1 breaker space, ideal for panels needing additional circuits without expansion.

Certifications & Compliance

  • UL Listed
  • CSA Certified
  • RoHS EUR Compliant
  • Mercury Free
  • Toxic Heavy Metal Free

Technical Specifications

  • Toxic Heavy Metal Free: Yes
  • Warranty: 18 months
  • Warranty Period: 18 months
  • Sustainable Packaging: No
  • Mercury Free: Yes
  • Number Of Spaces Required: 1
  • Packaging Without Single Use Plastic: Yes
  • ROHS Eur In Scope: Yes
  • Recycled Metal Content At Cr Level: 0 %
  • Poles Description: 1P
  • Serviceability: No
  • With Recycled Cardboard: No
  • Range Of Product: QO
  • Total Lifecycle Carbon Footprint: 18 kg CO2 eq.
  • Returnability: Yes

Typical Applications

  • Residential and Light Commercial Load Centers
  • Panelboard Space-Saving Circuit Additions
  • General Branch Circuit Protection
  • Renovation Projects Requiring Additional Circuits
  • New Construction Panel Wiring

Why Square D?

Square D QO circuit breakers are engineered with a trip-free, quick-make quick-break toggle mechanism and are UL Listed and CSA certified for dependable, code-compliant performance. With mercury-free, toxic heavy metal-free construction and RoHS EUR compliance, this QO tandem breaker gives electrical professionals a trusted, space-saving solution for panelboard and load center installations.

Manufacturer Resources

Product Specs

Product Type:
Circuit Breaker
Series:
QO
Voltage Rating:
120/240 VAC
Amperage Rating:
15A
Configuration:
Tandem, 2 x 1 Pole
Listing:
UL Listed
Standards:
CSA
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers
Product Depth:
2.91 in
Product Width:
0.75 in
Product Height:
3.23 in

Square D QOT1515 – Frequently Asked Questions

1) Will a Square D QOT1515 tandem breaker fit any QO load center space?
The QOT1515 is a plug-in tandem that takes one breaker space in a compatible Square D QO load center or panelboard. The catch is the panel itself: only spaces the manufacturer marks as tandem-approved will accept it, so check the panel's circuit directory or label before you count on doubling up a space. Physically it occupies a single 0.75 inch wide position, 3.23 inches high and 2.91 inches deep.
2) What does 2 x 1 pole tandem mean on the QOT1515, and does it give me 240V?
Two independent 15A single-pole breakers in one case, each one feeding a separate 120V branch circuit off the same bus stab. It is not a two-pole breaker, so it will not serve a 240V load like a dryer or a water heater. Voltage rating is 120/240 VAC because the device is rated for use in a 120/240 system, not because the two poles combine.
3) What wire size can I land on a QO tandem 15A breaker?
Each pole of the QOT1515 takes AWG 14 through AWG 8 copper, or AWG 12 through AWG 8 aluminum. For a 15A circuit that normally means 14 AWG copper, and the lug range gives you room if you are reusing a larger existing conductor coming back into the panel.
4) Can I use a QO tandem breaker to add AFCI or GFCI protection?
No. The QOT1515 is a plain thermal magnetic tandem with no arc fault or ground fault sensing. Bedroom, kitchen, laundry and similar circuits that require AFCI or GFCI protection under current code need a dedicated QO AFCI, GFCI or dual function breaker, or protection at the first outlet. Use the tandem only where straight overcurrent protection is all that is required.
5) Will a Square D QO tandem drop into an Eaton or ABB panel?
No. The QOT1515 is a plug-in breaker built for Square D QO load centers and panelboards, and bus stab geometry is not interchangeable between brands. For an Eaton panel you want an Eaton breaker such as the BAB Series Quicklag thermal magnetic line; ABB panels take ABB devices like the ST200M miniature breakers or the XT frames. Match the breaker brand and series to the panel label every time.
6) My panel is full. Is a tandem breaker the right fix or do I need a subpanel?
A QOT1515 lets you put two 15A circuits into one existing space, so it solves a full panel without a subpanel, provided two things hold: the panel is listed to accept tandems in that position, and you are not exceeding the panel's maximum circuit count. If the panel label does not permit tandems, or you need 240V circuits or AFCI/GFCI devices, a subpanel or panel replacement is the correct path.
7) Can an Eaton BAB series Quicklag breaker be used in place of a Square D QOT1515 tandem breaker?
No. The Square D QOT1515 is a plug-in breaker in the QO series, designed to drop into QO load centers and panelboards, and it is a tandem 2 x 1 pole device at 15A that fits a single breaker space. The Eaton BAB1010 is a bolt-on thermal-magnetic breaker in the BAB series, so it fastens to the bus rather than plugging in and belongs in Eaton BAB-compatible panels. Breaker-to-panel compatibility is determined by the panel manufacturer's listing, so match the breaker series to the load center you are working in.
8) I need three-phase protection instead of a tandem single-pole breaker - what should I look at?
The Square D QOT1515 is a tandem 2 x 1 pole device rated 120/240 VAC, so it provides two independent single-pole 15A branch circuits, not three-phase protection. For a three-pole device, the Eaton BAB-302 is a three-pole Quicklag thermal-magnetic breaker rated 240V, and for molded case three-pole applications the ABB A2A150TT in the A2 series is a three-pole molded case breaker. Confirm the panel or enclosure the three-pole device is listed for before ordering.
9) Is an ABB ST200M miniature circuit breaker an alternative to a Square D QO tandem breaker for branch circuit protection?
They serve different roles. The Square D QOT1515 is a UL Listed branch circuit breaker for 120/240 VAC residential and light commercial load centers. The ABB ST200M series is a C-curve miniature circuit breaker built to UL1077, which covers supplementary protectors - devices used downstream of branch circuit protection, typically on DIN rail inside control panels. If the job calls for branch circuit overcurrent protection in a load center, stay with the QO plug-in breaker.
10) Is 10kA interrupt rating enough for a residential or light commercial panel?
10 kA at 120/240 VAC, 50/60 Hz covers the available fault current at the vast majority of residential and light commercial load centers fed from a utility transformer. Where an engineer has calculated a higher available fault current at the panel, or the drawing calls out a series rating, you need a breaker specified to that number instead.
11) Is the QOT1515 UL Listed for a code inspection?
UL Listed and CSA certified, which is what an inspector looks for on a branch circuit breaker in both the US and Canada. It is also mercury free, toxic heavy metal free and RoHS EUR compliant, which matters if you are procuring against a sustainability spec.
12) Will a Bussmann CBC automotive circuit breaker work for a 120V household circuit?
No. The Bussmann CBC series is a Type I automotive circuit breaker rated 14VDC, intended for low-voltage DC vehicle and equipment wiring. The Square D QOT1515 is rated 120/240 VAC and is UL Listed and CSA certified for AC branch circuit protection in load centers and panelboards. The two are not interchangeable in either direction.
13) My application needs an adjustable or interchangeable trip rating rather than a fixed 15A breaker - what are the options?
The Square D QOT1515 is a fixed-rating thermal magnetic device at 15A per pole in a tandem 2 x 1 pole configuration, so the trip point cannot be changed in the field. For a breaker with a field-changeable rating, the Eaton 6602C72G67 is a Series C K-Frame 400A three-pole breaker with an interchangeable rating plug. That is a molded case frame for much larger feeders, not a load center branch device, so verify the enclosure and conductor sizing for the application.
14) Does the Square D QOT1515 accept an undervoltage release accessory?
The QOT1515 is a plug-in QO tandem breaker with an over-center, trip-free toggle mechanism and is specified as non-serviceable, so it is used as a sealed branch circuit device. Accessories such as the Eaton 10250T-GR undervoltage release are built for NZM series molded case breakers, which is a different platform. For shunt or undervoltage tripping on a circuit, plan around a molded case breaker frame that lists the accessory.
15) What is the exact part number to order for a 15A QO tandem?
Order Square D QOT1515: QO series, tandem 2 x 1 pole, 15A each pole, 120/240 VAC. Country of origin is Mexico. That designation is the one to quote on a submittal or a purchase order.
16) How do I tell if a QO tandem has tripped versus being switched off?
The QO toggle uses an over-center, trip-free mechanism with positive trip indication, so a tripped pole sits in a distinct position rather than mimicking an off handle. Quick-make, quick-break action means the contacts move independently of how fast you push the handle. Reset by driving the handle fully off, then back on.
How fast can I get the Square D QOT1515 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D QOT1515 come with a warranty?
Absolutely. The Square D QOT1515 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D QOT1515?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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