Skip to content

Shop
- Bathroom
  
  Vanities
  Faucets
  Sinks & Drains
  Mirrors
  Shower Systems & Kits
  Bath Hardware
  Preformed Corners & Seals
  Tile & Setting Materials
- Plumbing
  
  ABS / DWV Fittings
  PEX Fittings & Tubing
  Valves & Stops
  Traps
  Supply Lines
- Doors & Trim
  
  Interior Doors
  Door Jambs
  Baseboards
  Casings
  Door Hardware
- Electrical
  
  Breakers
  Device Boxes
  Switches & Outlets
  Wire & Cable
  Wall Plates
Company
- Get to know us
  
  About Us
  Contact
- Wholesale Program
  
  Apply for NorthLine Pro
Tools
- Calculators
  
  Flooring Calculator
  Tile Calculator
  Paint Calculator
  Drywall Calculator

Search

Shop
Bathroom
Vanities
Faucets
Sinks & Drains
Mirrors
Shower Systems & Kits
Bath Hardware
Preformed Corners & Seals
Tile & Setting Materials
Plumbing
ABS / DWV Fittings
PEX Fittings & Tubing
Valves & Stops
Traps
Supply Lines
Doors & Trim
Interior Doors
Door Jambs
Baseboards
Casings
Door Hardware
Electrical
Breakers
Device Boxes
Switches & Outlets
Wire & Cable
Wall Plates
Featured project
Bathroom reno essentials
Vanities, faucets, and shower kits — everything to gut and rebuild a bath in a weekend.
Shop the guide →
All departments →
Company
Get to know us
About Us
Contact
Wholesale Program
Apply for NorthLine Pro
Featured project
Bathroom reno essentials
Vanities, faucets, and shower kits — everything to gut and rebuild a bath in a weekend.
Shop the guide →
All departments →
Tools
Calculators
Flooring Calculator
Tile Calculator
Paint Calculator
Drywall Calculator
Featured project
Bathroom reno essentials
Vanities, faucets, and shower kits — everything to gut and rebuild a bath in a weekend.
Shop the guide →
All departments →

Search

Item added to your cart

View cart

Collection: Breakers

Circuit breakers for residential and light-commercial panels — single-pole, double-pole, and multi-amp Type QP breakers stocked for GTA electrical work.

Sort by:

12 products

Filter and sort Filter

Filter and sort

Filter

12 products

Sort by:

Remove all

12 products

Siemens Q115 15-Amp 1-Pole Circuit Breaker — Type QP, 10 kAIC

Siemens Q115 15-Amp 1-Pole Circuit Breaker — Type QP, 10 kAIC

Vendor:
Siemens

Regular price $9.99 CAD

Regular price Sale price $9.99 CAD
Siemens Q120 20-Amp 1-Pole Circuit Breaker — Type QP, 10 kAIC

Siemens Q120 20-Amp 1-Pole Circuit Breaker — Type QP, 10 kAIC

Vendor:
Siemens

Regular price $11.99 CAD

Regular price Sale price $11.99 CAD
Siemens Q1515 Twin 15-Amp Circuit Breaker — Type QT Tandem, 10 kAIC

Siemens Q1515 Twin 15-Amp Circuit Breaker — Type QT Tandem, 10 kAIC

Vendor:
Siemens

Regular price $26.99 CAD

Regular price Sale price $26.99 CAD
Siemens Q2020 Twin 20-Amp Circuit Breaker — Type QT Tandem, 10 kAIC

Siemens Q2020 Twin 20-Amp Circuit Breaker — Type QT Tandem, 10 kAIC

Vendor:
Siemens

Regular price $28.99 CAD

Regular price Sale price $28.99 CAD
Siemens Q215 15-Amp 2-Pole Circuit Breaker — Type QP, 240V

Siemens Q215 15-Amp 2-Pole Circuit Breaker — Type QP, 240V

Vendor:
Siemens

Regular price $24.99 CAD

Regular price Sale price $24.99 CAD
Siemens Q220 20-Amp 2-Pole Circuit Breaker — Type QP, 240V

Siemens Q220 20-Amp 2-Pole Circuit Breaker — Type QP, 240V

Vendor:
Siemens

Regular price $27.99 CAD

Regular price Sale price $27.99 CAD
Siemens Q230 30-Amp 2-Pole Circuit Breaker — Type QP, 240V

Siemens Q230 30-Amp 2-Pole Circuit Breaker — Type QP, 240V

Vendor:
Siemens

Regular price $29.99 CAD

Regular price Sale price $29.99 CAD
Siemens Q240 40-Amp 2-Pole Circuit Breaker — Type QP, 240V

Siemens Q240 40-Amp 2-Pole Circuit Breaker — Type QP, 240V

Vendor:
Siemens

Regular price $32.99 CAD

Regular price Sale price $32.99 CAD
Siemens Q250 50-Amp 2-Pole Circuit Breaker — Type QP, 240V

Siemens Q250 50-Amp 2-Pole Circuit Breaker — Type QP, 240V

Vendor:
Siemens

Regular price $34.99 CAD

Regular price Sale price $34.99 CAD
Siemens Q260 60-Amp 2-Pole Circuit Breaker — Type QP, 240V

Siemens Q260 60-Amp 2-Pole Circuit Breaker — Type QP, 240V

Vendor:
Siemens

Regular price $37.99 CAD

Regular price Sale price $37.99 CAD
Siemens QA115AFCCSA 15-Amp 1-Pole Combination AFCI Breaker — Type QP

Siemens QA115AFCCSA 15-Amp 1-Pole Combination AFCI Breaker — Type QP

Vendor:
Siemens

Regular price $94.99 CAD

Regular price Sale price $94.99 CAD
Siemens QA120AFCCSA 20-Amp 1-Pole Combination AFCI Breaker — Type QP

Siemens QA120AFCCSA 20-Amp 1-Pole Combination AFCI Breaker — Type QP

Vendor:
Siemens

Regular price $104.99 CAD

Regular price Sale price $104.99 CAD

3447 Kennedy Road, Unit 7
Scarborough, ON

+1-416-821-7977

info@gdbuildingsupply.com

Mon–Sat 8am–8pm
Sun 10:30am–7pm

Shop
For Pros
Calculators

Subscribe to our emails

Email

Payment methods

© 2026, Good Day Building Supply Inc.

Privacy policy
Refund policy
Terms of service
Shipping policy
Contact information

Choosing a selection results in a full page refresh.
Opens in a new window.