Skip to content
Free Local Pickup ● Ship to Your Hometown Store
Pro & Contractor Accounts ● Apply for Net Terms
100,000+ Products ● Trusted American Hardware Brands
FAQ Shipping & Returns Order Lookup Contact Account
Square D 15/20 amps Tandem Single Pole Circuit Breaker

Square D 15/20 amps Tandem Single Pole Circuit Breaker

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Expand your panel’s capacity with the Square D QO tandem circuit breaker. This 15/20 Amp, single-pole unit squeezes two circuits into one 1-space footprint, making it ideal for add…

Square D MPN QOT1520CP In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $28.99. Our online price is $31.99.
$31.99
Includes free shipping on orders over $75 · $8.99 standard below
Delivery in as little as 1–4 business days Order within — for same-day shipping
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

Expand your panel’s capacity with the Square D QO tandem circuit breaker. This 15/20 Amp, single-pole unit squeezes two circuits into one 1-space footprint, making it ideal for adding circuits without crowding the panel. Designed for 120/240-volt systems, it features plug-in mounting for quick installation and a compact 0.74 in wide by 1.4 in high by 3.3 in deep housing.

  • Mounting: Plug-In
  • Poles: Single Pole (tandem design delivering two circuits in one space)
  • Amps: 15/20
  • Voltage: 120/240 VAC
  • Series: QO
  • Packaging: Carded
  • Listings: UL Listed, CSA Listed
  • Breakers Included: Yes
  • Number of Spaces: 1
  • Dimensions: Width 0.74 in, Height 1.4 in, Depth 3.3 in
  • Indoor/Outdoor: Indoor and Outdoor

Ideal for upgrading existing Square D panels or expanding a compatible QO distribution setup, this tandem breaker supports two circuits in a compact footprint—perfect for finishing basements, garages, or other spaces where panel real estate is at a premium. Always verify panel compatibility and tandem acceptance for your specific installation before use.

The Details Specifications

Brand Square D
SKU 3866456
UPC 047569044120
Unit 0
Case Pack Quantity 10 per case
Retail Unit Quantity 1
Unit of Measure 0 0
Dimensions (L × W × H) 3 × 4 × 1
Weight 0 lbs
Cubic Feet 0.0059 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

What we offer
Free Local Pickup Ship to your hometown store
Pro & Gov Accounts Net terms · tax-exempt
Ships Nationwide From our distribution network
Independent Network Real hardware stores
$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
Their Counter
Try local first · we'll wait

The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

Find a local store →
Mon–Fri 6–5 PST
Independent hardware retailer? Join the network →
About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a co-op banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare