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Square D NQ442L4C NQ Main Lug - Square D NQ Main Lug, Convertible Panel Interiors
SQUARE DSquare D NQ Main Lug, Convertible Panel Interiors

Square D NQ442L4C NQ Main Lug

The Square D NQ Main Lug, Convertible Panel Interiors (MPN NQ442L4C) is a 42-space, 400 A copper-bus panelboard interior with a 45-inch height and 10 7/16-inch width, designed for QHB/QOB/QOB-VH circuit breakers. 3G…

SKU 3G-OTH-772289

Brand
SQUARE D
Item
NQ442L4C NQ Main Lug
Part Number
NQ442L4C
Category
Square D NQ Main Lug, Convertible Panel Interiors
Available to Order
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Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

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
NQ442L4C
Type
Copper, QHB/QOB/QOB-VH
Wd
10 7/16 in
Ht
45 in
Amps
400 A
Depth
5-3/4 in
Phase
Three
Width
10-7/16 in
Height
45 in
UNSPSC
39121103
Voltage
120/208 to 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 Adapter Kit
4HHA5
Main Circuit Breaker or Main Lug
Convertible; Main Lug

Technical Documents

(1)
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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Square D NQ Main Lug, Convertible Panel Interiors (MPN NQ442L4C) is a 42-space, 400 A copper-bus panelboard interior with a 45-inch height and 10 7/16-inch width, designed for QHB/QOB/QOB-VH circuit breakers. 3G Electric interprets your demand for this OEM component, sourcing it across 14 industrial departments — with specialist depth in electrical controls as an authorised distributor for Square D and brands like Schneider, ABB, and Siemens — to deliver the right answer with accountable support.

Frequently Asked Questions

What is the Square D NQ442L4C panelboard interior used for?

The Square D NQ442L4C is a 42-space, 400 A copper-bus panelboard interior used for distributing electrical power in commercial and industrial facilities. It accepts QHB, QOB, and QOB-VH circuit breakers, making it suitable for main lug or convertible main applications.

What are the specifications of the Square D NQ442L4C?

The Square D NQ442L4C panelboard interior has 42 spaces, 400 A amps, a copper bus, and accepts QHB/QOB/QOB-VH circuit breakers. It measures 45 in height by 10 7/16 in width. The bus material is copper, and the circuit breaker series is QOB-VH.

Where to buy the Square D NQ442L4C panelboard interior worldwide?

3G Electric supplies the Square D NQ442L4C panelboard interior worldwide, handling full logistics and customs clearance. As a specialist in electrical controls, we source this OEM component across 14 industrial departments, including brands like Square D, Schneider, ABB, and Siemens.

How to select the correct Square D panelboard interior for a project?

To select the correct Square D panelboard interior, match the number of spaces (e.g., 42), amp rating (400 A), bus material (copper), and circuit breaker series (QOB-VH) to your load requirements. Verify dimensions (45 in Ht, 10 7/16 in Wd) fit your enclosure. 3G Electric can help interpret your specs.

Used in

Common applications for SQUARE D
Commercial electrical panels — QO and QOB miniature circuit breakers for overcurrent protection in load centers and panelboards.
HVACR equipment — 8910 Series Type DPA definite purpose contactors for switching compressor and fan motor loads.
Industrial power distribution — J-Frame molded case circuit breakers for main and feeder protection in switchboards.
Residential ground-fault protection — QO and QOB GFI circuit breakers for kitchens, bathrooms, and outdoor circuits.
Motor control centers — definite purpose contactors for controlling pumps, fans, and other moderate motor loads.
OEM machinery — Square D circuit breakers and contactors for integration into control panels and equipment.
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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.

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