- Edmonton Stock: 12
Circuit Breaker · 20A 1-Pole 120V · Type QP Plug-In 10 kAIC · Siemens Q120
What this product is for
The Siemens Q120 is a 20A, 1-pole thermal-magnetic plug-in circuit breaker used to protect 120V branch circuits against overloads and short circuits in compatible Siemens loadcentres. It is a Type QP breaker with a 10 kA interrupting rating and 1 in (25.4 mm) pole width.
Use for
Use this breaker for new or replacement 120V branch circuits where the panel label calls for Siemens Type QP or listed compatible breakers. Typical applications include general receptacle and lighting circuits, and other 20A single-pole loads within the breaker and panel rating.
Avoid for
Avoid using this breaker in panels not specifically marked for Siemens Type QP breakers, or where a GFCI, AFCI, CAFCI or 2-pole breaker is required. Do not use it as a substitute for a different breaker family based only on physical fit.
Best for
Best for electricians and contractors servicing Siemens residential distribution equipment who need a standard 20A single-pole breaker with full-size 1 in (25.4 mm) format and straightforward replacement matching.
Installed in
Installed in compatible Siemens loadcentres, including Canadian applications commonly referencing EQL, SEQ and EQG series where the panel labelling permits this breaker. Always verify the exact loadcentre series and approved breaker types before ordering or installation.
Why this product exists
This breaker provides standard branch-circuit protection for 120V circuits using a common 20A single-pole format. For trade selection, a 20A branch circuit is typically paired with #12 AWG copper conductors. Continuous load is typically limited to 80% of breaker rating, or about 16A. Actual performance depends on installation conditions, conductor type, termination temperature ratings, load profile and local electrical code.
Compared with similar products
Compared with tandem or slim breakers, the Q120 is a full-width 1 in (25.4 mm) single-pole breaker. Compared with GFCI or AFCI Siemens breakers, this is a standard thermal-magnetic breaker intended where additional fault protection is not required by code or design.
Specifications
- Manufacturer: Siemens
- Part number: Q120
- Breaker type: Type QP
- Pole configuration: 1-pole
- Ampere rating: 20A
- Voltage rating: 120V
- Interrupting rating: 10 kAIC
- Mounting style: Plug-in / clip-on
- Module width: 1 in per pole (25.4 mm)
- Protection type: Thermal-magnetic
- Typical application: 120V branch circuits in compatible Siemens loadcentres
- Package Qty12
- PackagingCarton
- BrandSiemens Breakers
- Warranty5 year
- Electrical
- Poles1 Pole
- Amps20 Amp
- Voltage120
- Interrupt Rating (AIC)10
- Physical
- MountingPush on
- Width1"
- Breaker TypeStandard
Minimum Order $20
We accept the following payment methods:

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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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