Square D QO342ML2 3 Phase Load Center, 42 Spaces, 225A Main Lugs, NEMA 1

MPN: QO342ML2
UPC: 785901751137
PPN: SCH-QO342ML2

$927.57

Available to Order

Available to Ship Same/Next Business Day if In Stock and Ordered before 12:00 PM EST

Available To Ship Immediately:0

Loading dialog...

Loading add to cart quantity...

Looking to buy a large quantity?

To View Branch Inventory And Your Custom Pricing

Spec sheet

Compare

Description

QO Load Centers offer premium features by allowing QO breakers, ground fault interrupters, arc fault interrupters, and surge arresters to be installed inside. QO Load Centers are designed for residential and industrial use to protect electrical systems, equipment, and people. They are available in both traditional and plug on neutral configurations. There is 3 types of mains available. There is main circuit breaker, main lugs, and generator panel. Single and three phase options are available. The bus bars are tin plated copper and are shielded. Indoor and outdoors enclosures are an option. QO Load Centers enable the use of a full complement of accessories. This 3 phase load center has 42 spaces and 42 circuits. This system provides 225A convertible main lugs in a NEMA 1 enclosure. This product is CSA and UL rated.

Features

This QO Load Center provides a high-density 42-circuit interior, allowing you to centralize all 120/240V distribution in a single enclosure. For commercial electricians and facility managers, this eliminates the need for messy sub-panels and ensures you have the overhead required for future EV chargers, HVAC upgrades, or industrial machinery without a costly service upgrade.
Built around the industry-leading QO platform, this panel features the iconic shielded bus bar and "Plug-On" Neutral compatibility (on applicable models). This allows for faster breaker installation and cleaner wiring gutters, reducing labor hours and minimizing the risk of loose terminal connections that lead to heat buildup and equipment failure.
Housed in a rugged, powder-coated steel NEMA 1 enclosure, this load center is engineered for indoor environments. The shielding protects the interior from dust and debris, while the strict UL listing ensures it meets all National Electrical Code (NEC) requirements for safe power distribution in dry locations.
When used with Schneider Electric QO breakers, this panel supports the Visi-TripTM system, which provides a highly visible red indicator on any tripped breaker. This allows maintenance personnel to identify the faulty circuit at a glance among 42 possible breakers, drastically reducing downtime and simplifying troubleshooting for non-technical building occupants.

Documentation & Downloads

Specifications

Key Specifications

Country of Origin	United States

Depth	3.7 in

Complementary Attributes

Line Rated Current	225 A

Important Information Attributes

Persona Type Ids	EU, OM
Carbon Footprint Of The Distribution Phase [A4]	3.3350603571, 3 kg CO2 eq.
Carbon Footprint Of The Installation Phase [A5]	0.0077848129, 0 kg CO2 eq.
Carbon Footprint Of The Use Phase [B2 B3 B4 B6]	0.1 kg CO2 eq., 0.087341
Local Publishable Date	2026-07-14
Stocking Flag	Y
Weee Scope	In
Scope Perimeter	Outside of Europe
Reach Full Compliance Status	Reference contains Substances of Very High Concern above the threshold
Reach Compliance Directive	Reference contains Substances of Very High Concern above the threshold
Rohs Eur Status	Compliant By Exemption
Rohs Eur Full Compliance Status	Compliant By Exemption
With Recycled Cardboard	No
Product Contributes To Saved And Avoided Emissions	No
Tier	2
Function Option	Standard
Market Segmentation	Commercial
Awg Gauge	4 AWG...300 kcmil aluminium/copper
Cover Type	order separately
Electrical Connection	lugs
Energy Efficiency Optimized	False
Load Center Type	main lugs
Number Of Circuits	42
Phase	3 phase 4 wires
Product Or Component Type	Load Center
Returnability	Yes
Surface Finish	baked enamel Gray
Tightening Torque	main lugs 250 lb.in, 4 AWG...250 kcmil, aluminium/copperCover 20 lb.in
Pep Code	ENVPEP2212001EN
Pep Verification Date	2023-08-01
Psr Version	PSR-0005-ed2-EN-2016 03 29
Data Source	extrapolated product
Functional-unit Quantity	1
Reference Lifetime In Y	20
Energy Model - Installation [A5]	Electricity mix; AC; consumption mix, at consumer; 120V; US
Energy Model - End Of Life [C1-c4]	Electricity mix; AC; consumption mix, at consumer; 120V; US
Height Nominal	38.0 in
Certificate Agency	cULus
Short-circuit Current	10 kA
Package Weight(Lbs)	9.866 kg
Warranty (In Months)	18
Depletion Of Abiotic Resources - Fossil Fuels (Mj) Operational Energy Use [B6]	1.0634
Total Use Of Primary Energy During The Life Cycle (Mj) Operational Energy Use [B6]	1.1758
Water Pollution (M3) Operational Energy Use [B6]	4.3059

Persona Type Names	End User, Original Equipment Manufacturer
Carbon Footprint Of The End-of-life Phase [C1 To C4]	1 kg CO2 eq., 1.0344273004
Carbon Footprint Of The Manufacturing Phase [A1 To A3]	71 kg CO2 eq., 71.1947970588
Local Data Status	Publishable
Return Indicator	Y
Stock Policy	1
Weee Product Category	5
Eoli Availability Display	No need of specific recycling operations
Reach Full Compliance Status Id	CONTAINS_SVHC
Rohs Eur In Scope	Yes
Rohs Eur Conformity Date	2436
China Rohs In Scope	No
Without Single Use Plastic	No
Tier Id	2
Function Option Id	STANDARD
Market Segmentation Id	COMMERCIAL
Product Kit Identifier	N
Box Number	12
Device Composition	grounding bar (ordered separately)
Enclosure Material	welded sheet steel
Installation Direction	vertical
Material	tin plated copper: busbar
Number Of Spaces	42
Product Availability	Stock - Normally stocked in distribution facility
Range Of Product	QO
Software Version	EIME v5.9.4
Sustainable Packaging	No
Total Lifecycle Carbon Footprint	76 kg CO2 eq.
Database Version	2022-01
Pcr Version	PCR-ed3-EN-2015 04 02
Type Of Verification For The Pep	Independent external review
Functional-unit Description	Protect persons during 20 years against direct contact with live parts and allow grouping monitoring, control and protection devices in a single enclosure or a cabinet having the following dimensions 858mm×361mm×95mm, comply with UL 67 and CSA22.2 with an available offer:& 10•Suitable for use on 120/240 Vac and 48 Vdc systems& 10•Rated 30 to 400 amps 2 to 60 circuits& 10•3/4" circuit breaker width& 10•Single and three phase
Functional-unit Unit	unit
Energy Model - Manufacturing [A1-a3]	Energy model used: Lexington
Energy Model - Use [B6]	Electricity mix; AC; consumption mix, at consumer; 120V; US
Recyclability Potential In %	88
Width Nominal	14.2 in
[Ue] Rated Operational Voltage	120/240 V AC
Nbr. Of Units In Pkg.	1
Take-back	No
Air Pollution (M3) Operational Energy Use [B6]	7.4172
Total Use Of Non-renewable Primary Energy Resources (Primary Energy And Primary Energy Resources Used As Raw Materials) (Mj) Operational Energy Use [B6]	1.1052
Use Of Non-renewable Primary Energy Excluding Non-renewable Primary Energy Resources Used As Raw Materials (Mj) Operational Energy Use [B6]	1.1052
Customs Code	8537109150

Environment Attributes Main

China Rohs Regulation	Product out of China RoHS scope , Product out of China RoHS scope. Substance declaration for your information.
Take Back	No
Mercury Free	Yes
Environmental Disclosure	ENVPEP2212001EN
Nema Degree Of Protection	NEMA 1 indoor enclosure
Packaging Without Single Use Plastic	No
Pep Code	ENVPEP2212001EN
Pcr Version	PCR-ed3-EN-2015 04 02
Type Of Verification For The Pep	Independent external review

Ambient Air Temperature For Operation	-5 °C, -5 °C, 40 °C
Recycled Metal Content At Cr Level	0 %
Carbon Footprint	75.6594105293
Eu Rohs Directive	Compliant By Exemption
Packaging Made With Recycled Cardboard	No
Reach Regulation	Reference contains Substances of Very High Concern above the threshold
Pep Verification Date	2023-08-01
Psr Version	PSR-0005-ed2-EN-2016 03 29