SQUARE D Miniature Circuit Breaker: 90 A, 120/240V AC, Three Phase, 10kA at 120/240V AC
The SQUARE D QOB3901021 is a QOB Series, bolt-on miniature circuit breaker rated for 90 A, 120/240V AC, three-phase, with a maximum AIR rating of 10kA at 120/240V AC. It is designed for use with Square D NQOD…
SKU 3G-OTH-23433
Also listed as: QOB 3901021 · QOB-3901021
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 QOB3901021 is a QOB Series, bolt-on miniature circuit breaker rated for 90 A, 120/240V AC, three-phase, with a maximum AIR rating of 10kA at 120/240V AC. It is designed for use with Square D NQOD panelboards.
Frequently Asked Questions
What is the SQUARE D QOB3901021 miniature circuit breaker used for?
The SQUARE D QOB3901021 is a 90 A, three-phase, bolt-on miniature circuit breaker designed to protect electrical circuits in commercial and industrial applications. It is specifically intended for use with Square D NQOD panelboards, providing overcurrent protection at 120/240V AC with a 10kA interrupting rating.
What are the specifications of the SQUARE D QOB3901021?
The SQUARE D QOB3901021 is a QOB Series, bolt-on miniature circuit breaker rated for 90 A, 120/240V AC, three-phase, with 3 poles. It has a maximum AIR rating of 10kA at 120/240V AC and is designed for use with Square D NQOD panelboards. The manufacturer part number is QOB3901021.
Where to buy the SQUARE D QOB3901021 worldwide?
3G Electric supplies the SQUARE D QOB3901021 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 QOB3901021 for your NQOD panelboard application.
How to install the SQUARE D QOB3901021 circuit breaker?
Install the SQUARE D QOB3901021 by bolting it securely into a compatible Square D NQOD panelboard. Ensure the panelboard is de-energized before installation. Follow standard electrical safety practices and torque the terminals to the manufacturer's recommended specifications. Always consult a qualified electrician for installation.
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Common applications for SQUARE DSQUARE D Products
3G Electric supplies SQUARE D qob series, bolt-on square d miniature circuit breakers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
