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

The SQUARE D QOB Series Miniature Circuit Breaker (MPN QOB120) is a 20 A, single-phase, bolt-on circuit breaker rated for 120/240V AC with a maximum AIR rating of 10kA at 120/240V AC. Designed for use with Square D…

SKU 3G-OTH-22778

Brand
SQUARE D
Item
Miniature Circuit Breaker: 20 A, 120/240V AC, Single 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
QOB120
Type
Single Phase, 10kA at 120/240V AC
AC
120/240V
Amps
20 A
Phase
Single
Poles
1
For Use With
Square D NQOD Panelboards
Max. AIR Rating
10kA at 120/240V AC
AC Voltage Rating
120/240V AC
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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SQUARE D QOB Series Miniature Circuit Breaker (MPN QOB120) is a 20 A, single-phase, bolt-on circuit breaker rated for 120/240V AC with a maximum AIR rating of 10kA at 120/240V AC. Designed for use with Square D NQOD Panelboards, this 1-pole breaker provides overcurrent protection in industrial electrical distribution systems.

Frequently Asked Questions

What is the SQUARE D QOB120 miniature circuit breaker used for?

The SQUARE D QOB120 provides overcurrent protection in industrial electrical distribution systems. It is designed for use with Square D NQOD panelboards, protecting branch circuits in commercial and industrial facilities against overloads and short circuits.

What are the specifications of the SQUARE D QOB120 circuit breaker?

The SQUARE D QOB120 is a 20 A, single-phase, 1-pole bolt-on 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 Square D NQOD panelboards. The manufacturer part number is QOB120.

Where to buy SQUARE D QOB120 circuit breakers worldwide?

3G Electric supplies the SQUARE D QOB120 miniature circuit breaker to customers worldwide. As a global industrial equipment distributor, 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 QOB120 circuit breaker?

The SQUARE D QOB120 is a bolt-on breaker designed for Square D NQOD panelboards. Ensure the panel is de-energized before installation. Align the breaker with the bus bar and tighten the bolt securely. Follow all local electrical codes and manufacturer guidelines for safe 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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