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SQUARE D Miniature Circuit Breaker: 90 A, 120/240V AC, Three Phase, 22kA 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: 90 A, 120/240V AC, Three Phase, 22kA at 120/240V AC

The SQUARE D QOB390VH is a 90 A, three-phase miniature circuit breaker from the QOB Series, designed for bolt-on installation in Square D NQOD panelboards. It has an AC voltage rating of 120/240V AC and a maximum AIR…

SKU 3G-OTH-23370

Brand
SQUARE D
Item
Miniature Circuit Breaker: 90 A, 120/240V AC, Three Phase, 22kA 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
QOB390VH
Type
Three Phase, 22kA at 120/240V AC
AC
120/240V
Amps
90 A
Phase
Three
Poles
3
For Use With
Square D NQOD Panelboards
Max. AIR Rating
22kA 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 QOB390VH is a 90 A, three-phase miniature circuit breaker from the QOB Series, designed for bolt-on installation in Square D NQOD panelboards. It has an AC voltage rating of 120/240V AC and a maximum AIR rating of 22kA at 120/240V AC.

Frequently Asked Questions

What is the SQUARE D QOB390VH miniature circuit breaker used for?

The SQUARE D QOB390VH is a 90 A, three-phase miniature circuit breaker from the QOB Series. It is designed for bolt-on installation in Square D NQOD panelboards to protect electrical circuits from overloads and short circuits in commercial and industrial applications.

What are the specifications of the SQUARE D QOB390VH?

The SQUARE D QOB390VH is a 90 A, three-phase miniature circuit breaker with an AC voltage rating of 120/240V AC and a maximum AIR rating of 22kA at 120/240V AC. It is a bolt-on type from the QOB Series, designed for use with Square D NQOD panelboards.

Where to buy the SQUARE D QOB390VH worldwide?

You can source the SQUARE D QOB390VH through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this QOB Series circuit breaker.

How to install the SQUARE D QOB390VH circuit breaker?

The SQUARE D QOB390VH is a bolt-on miniature circuit breaker designed for installation in Square D NQOD panelboards. Ensure the panelboard is de-energized, then align the breaker with the bus bars and tighten the bolt securely. Follow all applicable electrical codes and manufacturer guidelines.

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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