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Square D HOMT-1515 Homeline Quad Tandem Circuit Breaker, 120/240VAC
Model: SQU-HOMT-1515
Square D HOMT-1515 Homeline Quad Tandem Circuit Breaker, 120/240VACThe Square D Homeline Quad Tandem Circuit Breaker is a plug-in miniature circuit breaker engineered for fast installation and...
Square D
Starting at
$23.94
Square D QO Tandem Circuit Breaker, 15A/20A, 120/240VAC
The Square D QO Tandem Circuit Breaker delivers overcurrent protection and switching for AC systems in a single-space, dual-circuit design. Configured with 1 pole at 15A and 1 pole at 20A, this thermal magnetic breaker is rated 120/240VAC with a 10kA interrupt rating, and is built with an over-center, trip-free toggle mechanism for quick-make, quick-break, positive action switching. It is UL Listed and CSA certified, making it suitable for professional load center and panelboard installations.
Key Features
- Space-Saving Tandem Design: Fits 1 x 15A pole and 1 x 20A pole into 1 required panel space for efficient load center use.
- Trip-Free Toggle Mechanism: Over-center, quick-make, quick-break toggle action with positive trip-free operation.
- Electrical Rating: 120/240VAC operational voltage with a 10kA interrupt rating for reliable overcurrent protection.
- Wire Compatibility: Accepts AWG 14 through AWG 8 copper or aluminum conductors.
- QO Series: Part of the Square D QO range of thermal magnetic circuit breakers for AC and DC systems.
- Long Service Life: Rated for an average life duration of 15 years.
Certifications & Compliance
- UL Listed
- CSA Certified
- RoHS EU Compliant
- Mercury Free
- Toxic Heavy Metal Free
- Halogen Free Product
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
- Tier Id: 1
- ROHS Eur In Scope: Yes
- Recycled Metal Content At Cr Level: 0 %
- H And D Enrichment Function: MCB
- Poles Description: 1P
- China ROHS Label: 1
- H And D Enrichment Assignment: no
- Serviceability: No
- With Recycled Cardboard: No
- WEEE Product Category: 5
- Range Of Product: QO
- Relationshiptype: Compatible relationship
- Total Lifecycle Carbon Footprint: 18 kg CO2 eq.
- China ROHS In Scope: No
- Return Indicator: Y
- Take Back: No
- Tier: 1
- Returnability: Yes
- Field Service Division: PPIBS
Typical Applications
- Residential and Commercial Load Centers
- Panelboard and Circuit Protection Upgrades
- Space-Saving Panel Configurations
- New Construction and Renovation Electrical Work
Why Square D?
Square D QO circuit breakers are engineered with a trip-free toggle mechanism and are UL Listed and CSA certified for dependable, code-compliant overcurrent protection. With a 10kA interrupt rating, mercury-free and toxic-heavy-metal-free construction, and an average life duration of 15 years, this QO Tandem breaker is built for long-term reliability in professional electrical installations.
Manufacturer Resources
Product Specs
- Product Type:
- Circuit Breaker
- Configuration:
- Tandem
- Voltage Rating:
- 120/240 VAC
- Amperage Rating:
- 15/20A
- Listing:
- UL Listed
- Standards:
- CSA
- Series:
- QO
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Subgroup:
- Circuit Breakers
- Product Width:
- 0.75 in
- Product Height:
- 3.23 in
- Product Depth:
- 2.91 in
Square D QO1520 – Frequently Asked Questions
1) Will a Square D QO1520 tandem breaker fit in any QO load center?
The QO1520 occupies one panel space and seats on QO plug-on bus. The limit isn't the breaker, it's the panel: load centers are only permitted to accept tandems in the spaces the panel label identifies as tandem-ready, and many QO panels are rated for full-size breakers only or allow tandems in a limited number of positions. Read the circuit directory label inside the door before you buy. The breaker itself is 0.75 in wide, 3.23 in high and 2.91 in deep.
2) What amperages do the two poles on the QO1520 give me?
Two separate circuits out of one space: one 15A pole and one 20A pole. It is not a 2-pole 240V breaker, it's a tandem, so each pole feeds its own 120V branch circuit. If you need both circuits at 20A, the QO1520 is the wrong part number.
3) Can I use a QO tandem breaker for a 240V circuit like a water heater?
No. A tandem gives you two independent 120V branch circuits in one space, with no common trip and no handle tie across a pair of bus phases. For a 240V load you need a two-pole QO breaker occupying two spaces. The QO1520 is rated 120/240VAC because the device is suitable for use in a 120/240V system, not because one pole can serve a 240V load.
4) My panel is full. Is a tandem breaker the right way to add a circuit?
It can be, if the panel is labeled to accept tandems in the position you want to use. One QO1520 turns a single space into a 15A and a 20A circuit without touching the enclosure. If the panel is not tandem-rated, or you have already used all the permitted tandem positions, you need a subpanel or a panel change instead, not this breaker.
5) Does this QO tandem have AFCI or GFCI protection?
No. The QO1520 is a plain thermal magnetic breaker with an over-center, trip-free toggle mechanism. If the circuit is in a bedroom, kitchen, laundry, bathroom or other area where current code calls for arc-fault or ground-fault protection, you need a QO AFCI, GFCI or dual-function breaker, and those are full-size devices requiring their own space.
6) What should I use instead of a QO tandem breaker for a three-phase feeder?
The QO1520 is a single-space tandem rated 120/240VAC and cannot serve a three-phase load. For three-pole applications, look at a molded case breaker such as the ABB A2A150TT in the A2 Series, the ABB XT4 three-pole kit, or the Eaton BAB-302 Quicklag three-pole thermal-magnetic breaker rated 240V. Those are three-pole devices sized for feeder and branch duty rather than a residential-style load center tandem space.
7) Can an Eaton BAB breaker be used in place of a Square D QO1520 tandem?
No. The QO1520 is a tandem breaker that fits 1 x 15A pole and 1 x 20A pole into a single panel space in Square D QO load centers and panelboards. The Eaton BAB1010 is a bolt-on thermal-magnetic breaker in Eaton's BAB/Quicklag family, which is a different mounting and panel system. Breakers must match the load center they are installed in, so a BAB bolt-on is not an interchange for a QO plug-on tandem.
8) How does the QO1520 differ from an ABB ST200M miniature circuit breaker?
The QO1520 is a tandem breaker carrying a 15A pole and a 20A pole in one panel space, rated 120/240VAC, UL Listed and CSA certified for branch circuits in load centers. The ABB ST200M Series is a C-curve miniature circuit breaker built to UL1077, which is the standard for supplementary protectors rather than branch-circuit breakers. If the circuit needs branch-circuit overcurrent protection in a panelboard, the QO tandem is the device type for that role.
9) What wire sizes will the QO1520 terminals take?
Each pole lug accepts AWG 14 through AWG 8, copper or aluminum. That covers 14 AWG for the 15A pole and 12 AWG for the 20A pole with headroom if you are running larger conductor for voltage drop on a long home run.
10) Can I use a QO1520 in an Eaton or ABB panel?
No. QO breakers are classified for Square D QO load centers and panelboards only; plug-on breakers are not interchangeable between manufacturers' bus designs. For Eaton gear, the comparable plug-on/bolt-on thermal-magnetic family is the Eaton BAB Quicklag line, and ABB panels take ABB devices such as the ST200M miniature breaker on DIN rail.
11) Is a Bussmann CBC circuit breaker an alternative to the Square D QO1520?
No, and the two are not in the same service at all. The QO1520 is a UL Listed, CSA certified AC breaker rated 120/240VAC for load centers and panelboards. The Bussmann CBC Series is a Type I automotive circuit breaker rated 14VDC, and the CBC-B version uses a waterproof stud terminal for vehicle wiring. Neither is used for building branch-circuit protection.
12) What part number do I order, and where is the Square D QO tandem made?
Order by Square D model QO1520, a 15A/20A tandem in the QO series. Country of origin is Mexico. Standardizing a building's spare stock on one part number is simple here since the tandem covers both a 15A and a 20A circuit from a single device.
13) Is the Eaton 10250T undervoltage release a substitute for a QO tandem breaker?
No. The QO1520 is a complete tandem circuit breaker with its own over-center trip-free toggle mechanism, 15A and 20A poles, and a 10kA interrupt rating. The Eaton 10250T-GR is an undervoltage release accessory for NZM Series molded case breakers, meaning it is an add-on trip device that requires a host breaker. It provides no branch-circuit protection on its own.
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Does the Square D QO1520 come with a warranty?
Absolutely. The Square D QO1520 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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