We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
RFQ CartGet a QuoteSign inSign up
SQUARE D Load Center: 125 A Amps, 208Y/120/240V AC, 12 Spaces, 65kA, 0 Max. No. of Tandem Breakers - Square D QO - Main Lug Load Centers
SQUARE DSquare D QO - Main Lug Load Centers

SQUARE D Load Center: 125 A Amps, 208Y/120/240V AC, 12 Spaces, 65kA, 0 Max. No. of Tandem Breakers

The Square D QO Main Lug Load Center (MPN QO312L125G) is a 125 A, 3-phase, 12-space indoor panel rated for 208Y/120/240V AC with a 65kA short-circuit current rating. It accepts no tandem breakers and requires a…

SKU 3G-OTH-609656

Brand
SQUARE D
Item
Load Center: 125 A Amps, 208Y/120/240V AC, 12 Spaces, 65kA, 0 Max. No. of Tandem Breakers
Category
Square D QO - Main Lug 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
QO312L125G
Type
65kA, Indoor
AC
208Y/120/240V
Phase
3
Spaces
12
Voltage
208Y/120/240V AC
Location
Indoor
Included Enclosure Cover
Order Separately
Max. No. Of Tandem Breakers
0
Short Circuit Current Rating
65kA
Main Circuit Breaker or Main Lug
Main Lug
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 Main Lug Load Center (MPN QO312L125G) is a 125 A, 3-phase, 12-space indoor panel rated for 208Y/120/240V AC with a 65kA short-circuit current rating. It accepts no tandem breakers and requires a separately ordered enclosure cover. 3G Electric interprets your demand for this genuine Square D load center, sources it across our 14 industrial departments, and supports your project with specialist depth in electrical controls.

Frequently Asked Questions

What is the Square D QO312L125G load center used for?

The Square D QO312L125G is a 125 A, 3-phase main lug load center for indoor 208Y/120/240V AC applications. It distributes power in commercial or industrial panels where a main breaker is upstream, supporting up to 12 circuits with a 65kA short-circuit rating.

What are the specifications of the Square D QO312L125G?

This Square D load center is rated 125 A, 208Y/120/240V AC, 3-phase, 65kA SCCR, with 12 spaces and zero tandem breaker capacity. It is a main lug type for indoor use. The enclosure cover is ordered separately. 3G Electric supplies this genuine Square D unit.

Where to buy the Square D QO312L125G load center worldwide?

3G Electric supplies the genuine Square D QO312L125G load center to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us to order this 125 A, 3-phase indoor panel for your project.

How to install a Square D main lug load center?

Install the Square D QO312L125G load center on a sturdy indoor wall, connect the upstream main breaker feed to the lugs, and route branch circuits to QO breakers (sold separately). Follow NEC guidelines and local codes. The cover must be ordered separately.

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 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: 100 A Amps, 120/240V AC, 6 Spaces, 10kA, 6 Max. No. of Tandem Breakers, Flush Cover (MPN QO612L100DF). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 10kA; Included Enclosure Cover: Flush Cover; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
SQUARE D
Load Center: 100 A Amps, 120/240V AC, 6 Spaces, 10kA, 6 Max. No. of Tandem Breakers, Flush Cover (MPN QO612L100DF). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 10kA; Included Enclosure Cover: Flush Cover; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
Load Center: 100 A Amps, 120/240V AC, 8 Spaces, 10kA, 8 Max. No. of Tandem Breakers, Surface Cover (MPN QO816L100DS). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 10kA; Included Enclosure Cover: Surface Cover; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
SQUARE D
Load Center: 100 A Amps, 120/240V AC, 8 Spaces, 10kA, 8 Max. No. of Tandem Breakers, Surface Cover (MPN QO816L100DS). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 10kA; Included Enclosure Cover: Surface Cover; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
Load Center: 125 A Amps, 208Y/120/240V AC, 24 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO324L125G). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
SQUARE D
Load Center: 125 A Amps, 208Y/120/240V AC, 24 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO324L125G). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
Load Center: 125 A Amps, 208Y/120/240V AC, 20 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO320L125G). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
SQUARE D
Load Center: 125 A Amps, 208Y/120/240V AC, 20 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO320L125G). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
Load Center: 225 A Amps, 208Y/120/240V AC, 42 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Outdoor (MPN QO342L225GRB). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Surface Cover; Phase: 3; Main Circuit Breaker or Main Lug: Main Lug; Location: Outdoor.
SQUARE D
Load Center: 225 A Amps, 208Y/120/240V AC, 42 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Outdoor (MPN QO342L225GRB). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Surface Cover; Phase: 3; Main Circuit Breaker or Main Lug: Main Lug; Location: Outdoor.
Load Center: 40 A Amps, 120/240V AC, 2 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Surface Cover (MPN QO2L40RB). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Surface Cover; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Outdoor.
SQUARE D
Load Center: 40 A Amps, 120/240V AC, 2 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Surface Cover (MPN QO2L40RB). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Surface Cover; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Outdoor.
Load Center: 100 A Amps, 120/240V AC, 6 Spaces, 10kA, 6 Max. No. of Tandem Breakers, Surface Cover (MPN QO612L100RB). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 10kA; Included Enclosure Cover: Surface Cover; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Outdoor.
SQUARE D
Load Center: 100 A Amps, 120/240V AC, 6 Spaces, 10kA, 6 Max. No. of Tandem Breakers, Surface Cover (MPN QO612L100RB). Key specifications — Voltage: 120/240V AC; Short Circuit Current Rating: 10kA; Included Enclosure Cover: Surface Cover; Phase: 1; Main Circuit Breaker or Main Lug: Main Lug; Location: Outdoor.
Load Center: 200 A Amps, 208Y/120/240V AC, 30 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO330L200G). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.
SQUARE D
Load Center: 200 A Amps, 208Y/120/240V AC, 30 Spaces, 65kA, 0 Max. No. of Tandem Breakers, Indoor (MPN QO330L200G). Key specifications — Voltage: 208Y/120/240V AC; Short Circuit Current Rating: 65kA; Included Enclosure Cover: Order Separately; Phase: 3; Main Circuit Breaker or Main Lug: Main Lug; Location: Indoor.