Tandem Circuit Breaker · 15A/20A 1-Pole · 1 in Space-Saving Plug-In · ABB THQLT1520
Tandem plug-in circuit breaker with one 15A single-pole circuit and one 20A single-pole circuit in a single 1 in (25 mm) breaker space. Designed for compatible ABB and GE PowerMark residential load centres, with 120/240V rating and 10 kA interrupting capacity.
What this product is for
The THQLT1520 is a tandem thermal-magnetic plug-in circuit breaker that provides two independent single-pole branch circuits in one 1 in (25 mm) breaker space: one 15A circuit and one 20A circuit. It is used to add circuit capacity in compatible residential load centres without adding another full breaker space.
Use for
- Adding one 15A and one 20A 120V branch circuit in a compatible ABB or GE PowerMark panel
- Residential panel retrofits where breaker space is limited
- Typical branch circuits using #14 AWG copper on 15A and #12 AWG copper on 20A, subject to panel labelling and local code
Rule of thumb: tandem breakers are commonly used when you need extra circuit count in an existing load centre, but only where the panel is specifically listed to accept them. Actual application depends on panel configuration and local electrical code.
Avoid for
- Panels not identified for tandem breaker use
- Applications requiring a common-trip 2-pole breaker
- Circuits that exceed the conductor or breaker rating
Best for
Electricians and maintenance buyers who need a listed, space-saving way to add two branch circuits in one breaker position on compatible Q-Line and PowerMark-style residential distribution equipment.
Installed in
Compatible new and existing single-phase ABB and GE by ABB PowerMark load centres, including models with or without wing stabs, where the panel directory and labelling permit tandem breakers.
Why this product exists
This breaker exists to increase usable circuit count in a load centre without expanding the enclosure. It combines a 15A and a 20A single-pole breaker into one 1 in (25 mm) footprint while maintaining standard plug-in installation for the listed panel family.
Compared with similar products
Compared with a standard full-size single-pole breaker, the THQLT1520 gives two branch circuits in the same 1 in (25 mm) space. Compared with a 2-pole breaker, it does not provide common-trip operation across both circuits. It is a practical choice when you need mixed 15A and 20A single-pole protection in one position.
Specifications
- Manufacturer part number: THQLT1520
- Brand: ABB
- Product family: Q-Line / THQLT tandem
- Type: Tandem thermal-magnetic plug-in circuit breaker
- Poles: 2 x 1-pole circuits
- Ampere rating: 15A and 20A
- Voltage rating: 120/240V AC
- Interrupt rating: 10 kA
- Breaker space used: 1 in (25 mm)
- Application: Compatible ABB and GE PowerMark residential load centres
- BrandABB Electrical Distribution
- Warranty5 year
- Electrical
- Poles1 Pole
- Amps15A - 20A
- Voltage120
- Interrupt Rating (AIC)10
- Physical
- MountingPush on
- Width1"
- Breaker TypeStandard
Minimum Order $20
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Standard Shipping-Free on orders over $500 in Metropolitan Areas / Subject to $750 in Rural Areas.
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998(Updated August 2026)
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.
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