SQUARE D QO140 Miniature Circuit Breaker, 40A, 1-Pole, 120/240V AC, 10kA
The SQUARE D QO140 is a 40 A, single-phase, plug-in miniature circuit breaker from the QO Series, rated for 120/240V AC with a maximum AIR rating of 10kA at 120/240V AC. Designed for use with QO Load Centers and NQ…
SKU 3G-OTH-21882
Also listed as: QO 140 · QO-140
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
Need installation or engineering help?
Ask a question
Product Description
The SQUARE D QO140 is a 40 A, single-phase, plug-in miniature circuit breaker from the QO Series, rated for 120/240V AC with a maximum AIR rating of 10kA at 120/240V AC. Designed for use with QO Load Centers and NQ Panelboards, this 1-pole breaker provides overcurrent protection in residential and commercial electrical distribution systems.
Frequently Asked Questions
What is the SQUARE D QO140 miniature circuit breaker used for?
The SQUARE D QO140 provides overcurrent protection in residential and commercial electrical distribution systems. It is designed for use with QO Load Centers and NQ Panelboards, safeguarding branch circuits against overloads and short circuits in single-phase, 120/240V AC applications.
What are the specifications of the SQUARE D QO140 circuit breaker?
The SQUARE D QO140 is a 40 A, single-phase, 1-pole plug-in miniature circuit breaker rated for 120/240V AC. It has a maximum AIR rating of 10kA at 120/240V AC and is designed for use with QO Load Centers and NQ Panelboards. The manufacturer part number is QO140.
Where to buy the SQUARE D QO140 circuit breaker worldwide?
3G Electric supplies the SQUARE D QO140 circuit breaker worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this breaker for your project.
How to install the SQUARE D QO140 miniature circuit breaker?
To install the SQUARE D QO140, ensure the load center is de-energized. Plug the breaker firmly into the bus bar of a compatible QO Load Center or NQ Panelboard. Verify the 40 A rating matches the circuit requirements. Always follow local electrical codes and use proper personal protective equipment.
Used in
Common applications for SQUARE DSQUARE D Products
3G Electric supplies SQUARE D qo series, plug-in square d miniature circuit breakers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
