Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
SQUARE D Load Center: 150 A Amps, 208Y/120/240V AC, 30 Spaces, 25kA, 0 Max. No. of Tandem Breakers - Square D QO - Main Lug, Convertible, Plug-On Neutral Load Centers
SQUARE DSquare D QO - Main Lug, Convertible, Plug-On Neutral Load Centers

SQUARE D Load Center: 150 A Amps, 208Y/120/240V AC, 30 Spaces, 25kA, 0 Max. No. of Tandem Breakers

The Square D QO Load Center (MPN QO330MQ150RB) is a 150 A, 3-phase, convertible main lug unit rated 208Y/120/240V AC with a 25kA short-circuit current rating. It offers 30 spaces, zero tandem breaker capacity, and…

SKU 3G-OTH-609583

Brand
SQUARE D
Item
Load Center: 150 A Amps, 208Y/120/240V AC, 30 Spaces, 25kA, 0 Max. No. of Tandem Breakers
Category
Square D QO - Main Lug, Convertible, Plug-On Neutral Load Centers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

SQUARE D
Manufacturer Part Number
QO330MQ150RB
Type
25kA, Outdoor
AC
208Y/120/240V
Phase
3
Spaces
30
Voltage
208Y/120/240V AC
Location
Outdoor
Included Enclosure Cover
Surface Cover
Max. No. Of Tandem Breakers
0
Short Circuit Current Rating
25kA
Main Circuit Breaker or Main Lug
Convertible
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The Square D QO Load Center (MPN QO330MQ150RB) is a 150 A, 3-phase, convertible main lug unit rated 208Y/120/240V AC with a 25kA short-circuit current rating. It offers 30 spaces, zero tandem breaker capacity, and includes a surface cover for outdoor installation.

Frequently Asked Questions

What is the Square D QO330MQ150RB load center used for?

This Square D QO load center distributes power in commercial or industrial 3-phase systems up to 150 A at 208Y/120/240V AC. Its outdoor-rated enclosure and convertible main lug design suit service-entrance or sub-feed applications where future main breaker upgrade may be needed.

What are the specifications of the Square D QO330MQ150RB?

The Square D QO330MQ150RB is a 150 A, 3-phase load center rated 208Y/120/240V AC with a 25kA short-circuit current rating. It provides 30 spaces, zero tandem breaker capacity, and includes a surface cover for outdoor installation. The main lug is convertible for main breaker addition.

Where to buy the Square D QO330MQ150RB worldwide?

3G Electric supplies the Square D QO330MQ150RB load center to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact our team for a quote and lead time on this convertible main lug unit for outdoor 3-phase applications.

How to install a Square D QO convertible load center outdoors?

Mount the Square D QO330MQ150RB on a flat vertical surface using the provided enclosure flanges. Connect line conductors to the main lugs per local code, ensuring torque values match the label. Use only Square D QO breakers rated for 25kA. Seal conduit entries to maintain outdoor rating.

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 square d qo - main lug, convertible, plug-on neutral load centers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from SQUARE D

View all SQUARE D parts →
Load Center: 200 A Amps, 120/240V AC, 24 Spaces, 65 kA, 12 Max. No. of Tandem Breakers, Indoor (MPN QO124L200PG). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 65 kA; Included Enclosure Cover: Order Separately; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
SQUARE D
Load Center: 200 A Amps, 120/240V AC, 24 Spaces, 65 kA, 12 Max. No. of Tandem Breakers, Indoor (MPN QO124L200PG). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 65 kA; Included Enclosure Cover: Order Separately; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
Load Center: 125 A Amps, 120/240V AC, 12 Spaces, 65 kA, 12 Max. No. of Tandem Breakers, Indoor (MPN QO112L125PGC). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 65 kA; Included Enclosure Cover: Combination Flush/Surface Cover; Phase: 1; Main Circuit Breaker or Main Lug: Convertible Main Lug; Location: Indoor.
SQUARE D
Load Center: 125 A Amps, 120/240V AC, 12 Spaces, 65 kA, 12 Max. No. of Tandem Breakers, Indoor (MPN QO112L125PGC). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 65 kA; Included Enclosure Cover: Combination Flush/Surface Cover; Phase: 1; Main Circuit Breaker or Main Lug: Convertible Main Lug; Location: Indoor.
Load Center: 125 A Amps, 208Y/120/240V AC, 30 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Outdoor (MPN QO330MQ125RB). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Surface Cover; Phase: 3; Main Circuit Breaker or Main Lug: Convertible; Location: Outdoor.
SQUARE D
Load Center: 125 A Amps, 208Y/120/240V AC, 30 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Outdoor (MPN QO330MQ125RB). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Surface Cover; Phase: 3; Main Circuit Breaker or Main Lug: Convertible; Location: Outdoor.
Load Center: 225 A Amps, 208Y/120/240V AC, 42 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO342MQ225). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Indoor.
SQUARE D
Load Center: 225 A Amps, 208Y/120/240V AC, 42 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO342MQ225). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Indoor.
Load Center: 200 A Amps, 208Y/120/240V AC, 42 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Outdoor (MPN QO342MQ200RB). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Surface Cover; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Outdoor.
SQUARE D
Load Center: 200 A Amps, 208Y/120/240V AC, 42 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Outdoor (MPN QO342MQ200RB). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Surface Cover; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Outdoor.
Load Center: 150 A Amps, 208Y/120/240V AC, 30 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO330MQ150). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Indoor.
SQUARE D
Load Center: 150 A Amps, 208Y/120/240V AC, 30 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO330MQ150). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Indoor.
Load Center: 100 A Amps, 208Y/120/240V AC, 27 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO327M100). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Indoor.
SQUARE D
Load Center: 100 A Amps, 208Y/120/240V AC, 27 Spaces, 25kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO327M100). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 25kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Indoor.
Load Center: 100 A Amps, 208Y/120/240V AC, 27 Spaces, 22kA, 0 Max. No. of Tandem Breakers, Outdoor (MPN QO327M100RB). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 22kA; Included Enclosure Cover: Surface Cover; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Outdoor.
SQUARE D
Load Center: 100 A Amps, 208Y/120/240V AC, 27 Spaces, 22kA, 0 Max. No. of Tandem Breakers, Outdoor (MPN QO327M100RB). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 22kA; Included Enclosure Cover: Surface Cover; Phase: 3; Main Circuit Breaker or Main Lug: Main Circuit Breaker; Location: Outdoor.