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

MPN: QO342ML2
UPC: 785901751137
PPN: SCH-QO342ML2
UNSPSC: 39121101

$927.57

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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

Weight	9866 g

Complementary Attributes

Line Rated Current	225 A

Ue Rated Operational Voltage	120/240 V AC

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
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
Database Version	2022-01
Height Nominal	38.0 in
Certificate Agency	cULus
Customs Code	8537109150
Warranty In Months	18
Functional Unit Quantity	1
Reference Lifetime In Y	20

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
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.
Data Source	extrapolated product
Width Nominal	14.2 in
Nbr. Of Units In Pkg.	1
Short Circuit Current	10 kA
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
Recyclability Potential In %	88

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