SQUARE D Miniature Circuit Breaker: 40 A, 120/240V AC, Three Phase, 10kA at 120/240V AC
The SQUARE D QO340 is a three-pole, 40 A miniature circuit breaker from the QO Series, designed for plug-in use in QO Load Centers and NQ Panelboards. It is rated for 120/240V AC with a maximum AIR rating of 10kA at…
SKU 3G-OTH-21916
Also listed as: QO 340 · QO-340
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The SQUARE D QO340 is a three-pole, 40 A miniature circuit breaker from the QO Series, designed for plug-in use in QO Load Centers and NQ Panelboards. It is rated for 120/240V AC with a maximum AIR rating of 10kA at 120/240V AC.
Frequently Asked Questions
What is the SQUARE D QO340 miniature circuit breaker used for?
The SQUARE D QO340 is a three-pole, 40 A miniature circuit breaker used for overcurrent protection in residential and commercial electrical systems. It is designed for plug-in installation in QO Load Centers and NQ Panelboards, providing reliable branch circuit protection at 120/240V AC.
What are the specifications of the SQUARE D QO340 circuit breaker?
The SQUARE D QO340 is a three-phase, 40 A miniature circuit breaker rated for 120/240V AC with a maximum AIR rating of 10kA at 120/240V AC. It has three poles and is designed for use with QO Load Centers and NQ Panelboards. The manufacturer part number is QO340.
Where to buy the SQUARE D QO340 circuit breaker worldwide?
3G Electric supplies the SQUARE D QO340 miniature circuit breaker to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this genuine SQUARE D QO340 breaker for your project.
How to install the SQUARE D QO340 circuit breaker?
To install the SQUARE D QO340, ensure the load center or panelboard is de-energized. Align the breaker's plug-in tabs with the bus bar slots and press firmly until it snaps into place. Verify the breaker is rated for 40 A and 120/240V AC, and follow all local electrical codes for safe installation.
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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.
