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SQUARE D Miniature Circuit Breaker: 20 A, 120/240V AC, Three Phase, 10kA at 120/240V AC - QOB Series, Bolt-On Square D Miniature Circuit Breakers
SQUARE DQOB Series, Bolt-On Square D Miniature Circuit Breakers

SQUARE D Miniature Circuit Breaker: 20 A, 120/240V AC, Three Phase, 10kA at 120/240V AC

The SQUARE D QOB3201021 is a QOB Series, bolt-on miniature circuit breaker rated for 20 A at 120/240V AC, three-phase, with a maximum AIR rating of 10kA at 120/240V AC. Designed for use with Square D NQOD…

SKU 3G-OTH-22814

Brand
SQUARE D
Item
Miniature Circuit Breaker: 20 A, 120/240V AC, Three Phase, 10kA at 120/240V AC
Category
QOB Series, Bolt-On Square D Miniature Circuit Breakers
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Technical Specifications

SQUARE D
Manufacturer Part Number
QOB3201021
Type
Three Phase, 10kA at 120/240V AC
AC
120/240V
Amps
20 A
Phase
Three
Poles
3
For Use With
Square D NQOD Panelboards
Max. AIR Rating
10kA at 120/240V AC
AC Voltage Rating
120/240V AC
View Full Spec Sheet

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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SQUARE D QOB3201021 is a QOB Series, bolt-on miniature circuit breaker rated for 20 A at 120/240V AC, three-phase, with a maximum AIR rating of 10kA at 120/240V AC. Designed for use with Square D NQOD panelboards, this three-pole breaker provides overcurrent protection in a compact bolt-on format.

Frequently Asked Questions

What is the SQUARE D QOB3201021 miniature circuit breaker used for?

The SQUARE D QOB3201021 provides overcurrent protection in three-phase, 20 A, 120/240V AC circuits. It is designed for bolt-on installation in Square D NQOD panelboards, making it suitable for commercial and industrial electrical distribution systems where reliable branch-circuit protection is required.

What are the specifications of the SQUARE D QOB3201021?

The SQUARE D QOB3201021 is a three-pole, bolt-on miniature circuit breaker rated 20 A at 120/240V AC, three-phase, with a maximum AIR rating of 10kA at 120/240V AC. It is part of the QOB Series and is intended for use with Square D NQOD panelboards.

Where to buy the SQUARE D QOB3201021 worldwide?

3G Electric supplies the SQUARE D QOB3201021 miniature circuit breaker to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this Square D QOB Series breaker.

How to install the SQUARE D QOB3201021 circuit breaker?

Install the SQUARE D QOB3201021 by bolting it into a compatible Square D NQOD panelboard. Ensure the panel is de-energized, then torque the bolt-on connections to the manufacturer's specifications. Always follow local electrical codes and use appropriate personal protective equipment during installation.

Used in

Common applications for SQUARE D
Commercial building electrical panels — Square D QO series plug-in circuit breakers for branch circuit protection
Industrial motor control centers — Square D QOB series bolt-on breakers in NQOD panelboards
Heating equipment installations — Square D QOU series unit-mount breakers for overcurrent protection
Outdoor electrical distribution — Square D L-Frame enclosures housing LAL/LHL breakers for 400 A service
Indoor facility power distribution — Square D Q-Frame enclosures with QBL/QDL breakers for 225 A circuits
Retrofit and replacement in existing Square D load centers — QO series breakers for 120/240V AC systems

SQUARE 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.

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