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

3G Electric
SQUARE D NQ Main Lug Convertible Panel Interior - Square D NQ Main Lug, Convertible Panel Interiors
SQUARE DSquare D NQ Main Lug, Convertible Panel Interiors

SQUARE D NQ Main Lug Convertible Panel Interior

The Square D NQ Main Lug, Convertible Panel Interiors (MPN NQ42L6C) is a 42-space, 600 A copper-bus panelboard interior for QHB/QOB/QOB-VH circuit breakers, measuring 45 in Ht x 10 7/16 in Wd. 3G Electric interprets…

SKU 3G-OTH-772335

Brand
SQUARE D
Item
NQ Main Lug Convertible Panel Interior
Part Number
NQ42L6C
Category
Square D NQ Main Lug, Convertible Panel Interiors
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

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Compliance & shipping

Hazardous material
Not classified as hazardous
California Prop 65 warning
No warning recorded
Licence required
No licence required
Safety Data Sheet
Not available
Special shipping
Required — additional freight charges may applyThis item requires special shipping, additional charges may apply.

Technical Specifications

SQUARE D
Manufacturer Part Number
NQ42L6C
Type
Copper, QHB/QOB/QOB-VH
Wd
10 7/16 in
Ht
45 in
Amps
600 A
Depth
5-3/4 in
Phase
Single
Width
10-7/16 in
Height
45 in
UNSPSC
39121103
Voltage
120/240V AC
Standards
CSA Approved; UL Listed
Bus Material
Copper Bus Material Bus Material This is the material of the bus bar in the load center or panelboard.
Catalog Page
187
For Use With
NQ Circuit Breakers
Number of Spaces
42
Country of Origin
South Korea (subject to change)
Circuit Breaker Type
Plug In Miniature
Recommended Enclosure
12N640 for Main Breaker; 1D700 for Main Lug
Circuit Breaker Series
QHB; QOB; QOB-VH
Recommended Flush Cover
3TX94 for Main Breaker; 4HHA2 for Main Lug
Recommended Surface Cover
12N641 for Main Breaker; 3TX88 for Main Lug
Recommended Ground Bar Kit
5B716
Short Circuit Current Rating
100000 RMS Symmetrical
Main Circuit Breaker or Main Lug
Convertible; Main Lug

Technical Documents

(1)
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 NQ Main Lug, Convertible Panel Interiors (MPN NQ42L6C) is a 42-space, 600 A copper-bus panelboard interior for QHB/QOB/QOB-VH circuit breakers, measuring 45 in Ht x 10 7/16 in Wd. 3G Electric interprets this demand and sources the genuine Square D NQ42L6C across 14 industrial departments — with specialist depth in electrical controls as an authorised distributor — ensuring you get the right answer, not just a catalog.

Frequently Asked Questions

What is the Square D NQ42L6C panelboard interior used for?

The Square D NQ42L6C is a 42-space, 600 A copper-bus panelboard interior designed for QHB/QOB/QOB-VH circuit breakers. It is used in commercial and industrial electrical distribution systems to organize branch circuits. 3G Electric sources this genuine Square D component across 14 industrial departments, with specialist depth in electrical controls.

What are the specifications of the Square D NQ42L6C?

The Square D NQ42L6C panelboard interior has 42 spaces, 600 A amps, copper bus material, and accepts QHB/QOB/QOB-VH circuit breakers. It measures 45 in Ht x 10 7/16 in Wd. This NQ main lug convertible panel interior is manufactured by Square D, part number NQ42L6C.

Where to buy the Square D NQ42L6C panelboard interior worldwide?

3G Electric supplies the genuine Square D NQ42L6C panelboard interior worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we interpret your demand and source this component across 14 departments, ensuring you get the right answer for your electrical distribution needs.

How to select the correct Square D panelboard interior for my application?

To select the correct Square D panelboard interior, match the bus material (copper or aluminum), ampacity (e.g., 600 A), number of spaces (e.g., 42), and circuit breaker series (e.g., QOB). Verify dimensions fit your enclosure. 3G Electric can help interpret your requirements and source the genuine Square D NQ42L6C or equivalent, with specialist depth in electrical controls.

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
Not sure this is the right part? Photo-identify it

SQUARE D Products

3G Electric supplies SQUARE D square d nq main lug, convertible panel interiors. 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

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first