SQUARE D Miniature Circuit Breaker: 40 A, 120/240V AC, Three Phase, 10kA at 120/240V AC
The SQUARE D QO Series Miniature Circuit Breaker (MPN QO3401021) is a three-phase, plug-in circuit breaker rated for 40 A at 120/240V AC with a maximum AIR rating of 10kA at 120/240V AC. Designed for use with QO Load…
SKU 3G-OTH-21927
Also listed as: QO 3401021 · QO-3401021
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
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Product Description
The SQUARE D QO Series Miniature Circuit Breaker (MPN QO3401021) is a three-phase, plug-in circuit breaker rated for 40 A at 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 3-pole breaker provides overcurrent protection in industrial electrical distribution systems.
Frequently Asked Questions
What is the SQUARE D QO3401021 miniature circuit breaker used for?
The SQUARE D QO3401021 provides overcurrent protection in three-phase industrial electrical distribution systems. It is designed for use with QO Load Centers and NQ Panelboards, handling 40 A at 120/240V AC with a 10kA interrupting rating.
What are the specifications of the SQUARE D QO3401021 circuit breaker?
This SQUARE D QO Series breaker is a 3-pole, three-phase unit rated 40 A at 120/240V AC. It has a maximum AIR rating of 10kA at 120/240V AC and is plug-in style for QO Load Centers and NQ Panelboards.
Where to buy the SQUARE D QO3401021 circuit breaker worldwide?
3G Electric supplies the SQUARE D QO3401021 miniature circuit breaker to customers worldwide. We handle full logistics, customs clearance, and delivery, ensuring you receive genuine SQUARE D components for your industrial electrical projects.
How to install the SQUARE D QO3401021 circuit breaker?
Install the SQUARE D QO3401021 by plugging it into a compatible QO Load Center or NQ Panelboard. Ensure power is off, align the breaker with the bus bar, and press firmly until seated. Follow all local electrical codes and manufacturer guidelines.
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.
