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 Mechanical Connector: For Wire Size 1 AWG – 250 kcmil - Mechanical Panelboard Lugs
SQUARE DMechanical Panelboard Lugs

SQUARE D Mechanical Connector: For Wire Size 1 AWG – 250 kcmil

The SQUARE D AL400LA is a tin-plated aluminum mechanical panelboard lug designed for wire sizes from 1 AWG to 250 kcmil with one wire termination. This connector is manufactured by SQUARE D for use in panelboard…

SKU 3G-OTH-18073

Brand
SQUARE D
Item
Mechanical Connector: For Wire Size 1 AWG – 250 kcmil
Category
Mechanical Panelboard Lugs
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
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
AL400LA
Lug Material
Tin-Plated Aluminum
Wire Terminations
1
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 AL400LA is a tin-plated aluminum mechanical panelboard lug designed for wire sizes from 1 AWG to 250 kcmil with one wire termination. This connector is manufactured by SQUARE D for use in panelboard applications.

Frequently Asked Questions

What is the SQUARE D AL400LA mechanical connector used for?

The SQUARE D AL400LA is a tin-plated aluminum mechanical panelboard lug used to terminate one wire from 1 AWG to 250 kcmil in panelboard applications. It is commonly installed in commercial and industrial electrical distribution panels to secure and connect aluminum or copper conductors.

What are the specifications of the SQUARE D AL400LA?

The SQUARE D AL400LA is a tin-plated aluminum mechanical connector with one wire termination. It accepts wire sizes from 1 AWG to 250 kcmil. The manufacturer part number is AL400LA. It is designed for use in SQUARE D panelboards and is rated for aluminum conductors.

Where to buy the SQUARE D AL400LA worldwide?

3G Electric supplies the SQUARE D AL400LA mechanical connector worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this part.

How to install the SQUARE D AL400LA mechanical connector?

To install the SQUARE D AL400LA, strip the conductor to the recommended length, insert it fully into the lug barrel, and tighten the set screw to the torque specified by SQUARE D. Use a calibrated torque wrench. Always follow NEC and local codes for aluminum conductor installations.

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 mechanical panelboard lugs. 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 →

Similar products

Matched by specification & description
BURNDY Mechanical Connector: For Wire Size 6 AWG – 250 kcmil, 2 Wire Terminations (MPN K2A29U). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY
BURNDY Mechanical Connector: For Wire Size 6 AWG – 250 kcmil, 2 Wire Terminations (MPN K2A29U). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY Mechanical Connector: For Wire Size 2 AWG – 600 kcmil, 8 Wire Terminations (MPN KK4A36U4N). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY
BURNDY Mechanical Connector: For Wire Size 2 AWG – 600 kcmil, 8 Wire Terminations (MPN KK4A36U4N). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY Mechanical Connector: For Wire Size 2 AWG – 750 kcmil, 1 Wire Terminations (MPN KA39230U). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY
BURNDY Mechanical Connector: For Wire Size 2 AWG – 750 kcmil, 1 Wire Terminations (MPN KA39230U). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY Mechanical Connector: For Wire Size 2 AWG – 600 kcmil, 2 Wire Terminations (MPN K2A36U2N). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY
BURNDY Mechanical Connector: For Wire Size 2 AWG – 600 kcmil, 2 Wire Terminations (MPN K2A36U2N). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY Mechanical Connector: For Wire Size 6 AWG – 250 kcmil, 4 Wire Terminations (MPN K4A29U4N). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY
BURNDY Mechanical Connector: For Wire Size 6 AWG – 250 kcmil, 4 Wire Terminations (MPN K4A29U4N). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY Mechanical Connector: For Wire Size 14 AWG – 1/0 AWG, 2 Wire Terminations (MPN K2A25U). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.
BURNDY
BURNDY Mechanical Connector: For Wire Size 14 AWG – 1/0 AWG, 2 Wire Terminations (MPN K2A25U). Key specifications — Brand: BURNDY; Lug Material: Tin-Plated Aluminum.

More from SQUARE D

View all SQUARE D parts →