Reference images. Contact us for photos of the available unit.


Schneider Electric

NQMB4LA

Square D 400A Main Breaker Kit for NQ Series Panelboard LAL/LHL


Current: 400
Choose your condition
Compare New & Re-Certified

New
Original equipment manufacturer (OEM) products that have never been energized. New items may come in their original factory packaging or may be unused components removed from new panels. Packaging and cosmetic appearance can vary; contact our team for details or photos of the available unit.

Re-Certified
Original equipment manufacturer (OEM) products that have previously been energized and have been inspected, tested, and recertified for return to service. These items may show signs of prior use. Contact our team for details about the unit’s condition, testing documentation, and applicable warranty.

Ask about this part →
Price:
Sale price $931.86
Stock:
Low inventory, please call (866) 377-3532 for stock check

Need it urgently? Call to confirm shipping options

Buying for a project? Request a quote

Same-Day Shipping

Most items ship same-day if ordered by 12:30 PM PST.

Product Description & Specifications

Confirm the complete catalog number and application requirements before ordering. The specifications below reflect the product information available for this listing.

Manufacturer
Schneider Electric
Brand
Square D
Sub-Category
Power Distribution
Series
NQ Series
Rated current
400
Country of origin
Mexico
Section
Distribution Panels
UPC
785901545972
Weight
12.82
Certification
cULus
Product description & additional details

NQMB4LA


NQMB4LA is a Square D main breaker kit designed for use with NQ Series panelboards and LAL/LHL 400A circuit breakers.This direct main breaker kit is compatible with LAL, LHL, and LC (F/A only) 400 amp circuit breakers and NQ Series panelboards. It includes mounting hardware and is manufactured in the US by Schneider Electric. The kit supports wire gauges up to 500 kcmil copper and is UL and cULus certified. It is a factory-assembled accessory that facilitates easy installation and panelboard modification.
  • Amperage: 400 A
  • Compatible Circuit Breakers: LAL, LHL, LC (F/A only)
  • Series/Frame: NQ Series
  • Type: Direct main breaker kit
  • Wire Gauge Capacity: Up to 500 kcmil copper
  • Country of Origin: US
  • Certifications: cULus Listed
  • Includes mounting pan, cover, hex shank, support brackets, screws
  • Installation accessory for NQ panelboards
  • Weight: Approximately 12.8 lbs
  • Manufacturer: Schneider Electric (Square D brand)
At Essential Parts, we offer fast shipping, lowest price, and expert support to help you get the right product every time.

Specifications

  • Part Number: NQMB4LA
  • Manufacturer : Schneider Electric
  • Brand : Square D
  • Category : Distribution Equipment
  • Item Subcategory : Power Distribution
  • Section : Distribution Panels
  • Family : NQ Series
  • Amperage : 400

Product Data

  • UPC : 785901545972
  • Country of Origin : Mexico
  • Weight : 12.82
  • Certification : cULus

Technical Documents
Return eligibility: what to know before ordering

Return requests must be made within 30 days of shipping and require authorization. Used, installed, energized, or tested items are not eligible. A restocking fee of up to 35% may apply. Review the full policy before purchase.

Product-specific restrictions apply. International orders are non-cancellable and non-refundable under the policy.

Read the complete return and warranty policy ↗

Warranty supplied by Essential Electric

Warranty coverage is provided by Essential Electric, subject to the product and policy terms. Essential Electric is an independent supplier. Surplus or discontinued inventory may not qualify for the original manufacturer’s warranty.

Review coverage, exclusions, and the claim process ↗

Hear from other buyers.

What customers say about ordering from Essential Electric.

Reviews for this product

You may also like

Save $32.88
default product icon QOC42US Square D QO® Series 42-Space Load Center Cover, Surface-Mounted, UL Listed, CSA Rated - Essential Electric Supply
QOC42US - Square D QO 42-Space Load Center Cover Surface Gray Type 1
Sale price $78.12 Regular price $111.00
In stock
Save $530.26
Essential Electric Default Product Image
Save $16.92
default product icon
Save $6.73
default product icon PK15GTAL - Square D QO/Homeline Load Center Ground Bar Kit 15-Terminal 14-4/1-4/0 AWG
Save $2,087.02
default product icon NQ484L2 - Essential Electric Supply
Save $30.17
default product icon
Save $2,996.00
default product icon NF442L4C - Essential Electric Supply
Save $200.81
default product icon NQMB2Q - Essential Electric Supply
Save $371.04
default product icon QOE260GFINM - Essential Electric Supply