UL 891 Certified certified

UL 891 Certified

EUSERC Approved certified

EUSERC Approved

Siemens Approved OEM certified

Siemens Approved OEM

Switchgear Manufacturers and Suppliers

DEI Power offers a comprehensive range of UL 891-certified switchgear, switchboards, panelboards, and service entrance equipment built with genuine Siemens components. Designed for commercial, industrial, utility, and data center applications, these products are available from 400A to 4000A with NEMA 1 and NEMA 3R enclosure options and full seismic zone compliance.

1000 Amp Service Entrance Switchgear NEMA 1/3R
400 Amp Service Entrance Switchgear NEMA 1/3R
1200 Amp Switchboard NEMA 1/3R
600 Amp Service Entrance Switchgear NEMA 1/3R
400 Amp Switchboard NEMA 1/3R
400 Amp Panelboard NEMA 1/3R
600 Amp Switchboard NEMA 1/3R
1000 Amp Switchgear NEMA 1/3R
4000 Amp Switchboard NEMA 1/3R
Switchgear
4000 Amp Switchgear NEMA 1/3R
3000 Amp Panelboard NEMA 1/3R
480V Service Entrance Switchgear NEMA 1/3R
480Y/277V Switchgear NEMA 1/3R
480V Switchboard NEMA 1/3R
2000 Amp Switchgear NEMA 1/3R
2500 Amp SES NEMA 1/3R
1000 Amp Switchboard NEMA 1/3R
2500 Amp Service Entrance Switchgear NEMA 1/3R
1600 Amp Switchgear NEMA 1/3R
Service Entrance Switchgear NEMA 1/3R
240/120V Switchgear NEMA 1/3R
600 Amp Switchgear NEMA 1/3R
400 Amp SES NEMA 1/3R
800 Amp Panelboard NEMA 1/3R
415/240V Switchgear NEMA 1/3R
1200A Switchgear NEMA 1/3R
Switchboard NEMA 1/3R
480V Switchboard NEMA 1/3R
4000 Amp Switchgear NEMA 1/3R
2500 Amp Switchboard NEMA 1/3R
1000 Amp Panelboard NEMA 1/3R
2000 Amp Service Entrance Switchgear NEMA 1/3R
1200 Amp Service Entrance Switchgear NEMA 1/3R
4000 Amp Service Entrance Switchgear NEMA 1/3R
2000 Amp Switchboard NEMA 1/3R
800 Amp Switchgear NEMA 1/3R
3000 Amp Switchboard NEMA 1/3R
240V Service Entrance Switchgear NEMA 1/3R
1600 Amp Service Entrance Switchgear NEMA 1/3R
208Y/120V Switchgear NEMA 1/3R
3000 Amp Service Entrance Switchgear NEMA 1/3R
480V Switchgear NEMA 1/3R
1000 Amp SES NEMA 1/3R
2500 Amp Switchgear NEMA 1/3R
2000 Amp Panelboard NEMA 1/3R
480Y/277V Switchboard NEMA 1/3R
480Y/277V Service Entrance Switchgear NEMA 1/3R
240V Switchgear NEMA 1/3R
240/120V Switchboard NEMA 1/3R
240/120V Service Entrance Switchgear NEMA 1/3R
800 Amp Switchboard NEMA 1/3R
208Y/120V Service Entrance Switchgear NEMA 1/3R
480Y/277V Panelboard NEMA 1/3R
800 Amp SES NEMA 1/3R
415/240V Service Entrance Switchgear NEMA 1/3R
1600 Amp Switchboard NEMA 1/3R
415/240V Switchboard NEMA 1/3R
480V Panelboard NEMA 1/3R
240V Switchboard NEMA 1/3R
120/240V Panelboard NEMA 1/3R
208Y/120V Switchboard NEMA 1/3R
3000 Amp Switchgear NEMA 1/3R
1600 Amp Panelboard NEMA 1/3R

Our Range of Products

1000 Amp Service Entrance Switchgear NEMA 1/3R

1000 Amp Service Entrance Switchgear NEMA 1/3R

  • 1000A rated, NEMA 1 & 3R enclosures
  • UL Listed & EUSERC Approved assembly
  • Seismic-rated: meets UBC, CBC & IBC
400 Amp Service Entrance Switchgear NEMA 1/3R

400 Amp Service Entrance Switchgear NEMA 1/3R

  • 400A service entrance, multi-voltage support
  • NEMA 1 indoor & NEMA 3R outdoor enclosures
  • UL listed & meets all seismic zone codes
1200 Amp Switchboard NEMA 1/3R

1200 Amp Switchboard NEMA 1/3R

  • 1200A capacity for heavy power demands
  • NEMA 1 indoor & NEMA 3R outdoor enclosures
  • UL listed with seismic zone compliance
600 Amp Service Entrance Switchgear NEMA 1/3R

600 Amp Service Entrance Switchgear NEMA 1/3R

  • 600A service entrance, 5 voltage options
  • NEMA 1 indoor & NEMA 3R outdoor enclosures
  • UL listed & EUSERC approved for compliance
400 Amp Switchboard NEMA 1/3R

400 Amp Switchboard NEMA 1/3R

  • 400A switchboard, 7 voltage configurations
  • NEMA 1 indoor & NEMA 3R outdoor enclosures
  • UL 891 certified & EUSERC approved unit
400 Amp Panelboard NEMA 1/3R

400 Amp Panelboard NEMA 1/3R

  • 400A rated, NEMA 1 & 3R enclosures
  • UL 891 & EUSERC Approved compliance
  • Seismic-rated for all UBC, CBC & IBC

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Frequently Asked Questions

Who are the largest switchgear manufacturers?

The largest global switchgear manufacturers include Siemens, Eaton, ABB, Schneider Electric, and GE. DEI Power is a Siemens Approved OEM manufacturer based in Ontario, California, producing UL 891-certified low-voltage switchgear and switchboards with genuine Siemens components for commercial, industrial, and utility applications across the USA.

Which company is best for switchgear?

What is the difference between switchgear and a switchboard?

What certifications should switchgear have?

What amperage ranges are available for switchgear?

What is NEMA 1 vs. NEMA 3R enclosure rating for switchgear?

How long does it take for switchgear to ship?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Commercial Buildings & Campuses

Commercial Buildings & Campuses

Switchgear and switchboards power electrical distribution in office buildings, retail, and mixed-use campuses.

Industrial & Manufacturing

Industrial & Manufacturing

Heavy-duty switchgear supports reliable power for manufacturing lines, processing plants, and industrial facilities.

Utility & Infrastructure

Utility & Infrastructure

Service entrance switchgear and high-amperage panels meet utility specifications for substations and infrastructure.

Data Centers & Colocation

Data Centers & Colocation

Critical power distribution switchgear ensures uptime and reliability for data centers and colocation facilities.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

You might also like

Why Contractors, Engineers & Facility Teams Choose DEI Power

Siemens Approved OEM Manufacturing

As an approved Siemens OEM, DEI Power builds every switchgear assembly with genuine Siemens components, ensuring precision-engineered reliability and full code compliance on every project.

In-House Manufacturing & Fast Fulfillment

DEI Power's 50,000 sq. ft. Ontario, CA facility enables in-house switchgear builds, delivering faster lead times, fewer delays, and free shipping with 3–5 business day delivery nationwide.

10+ Years of Power Distribution Expertise

With over a decade of experience serving commercial, industrial, and utility sectors, DEI Power provides dedicated project support, in-house engineering guidance, and long-term serviceability.

Get a Custom Switchgear Quote for Your Project

Submit your project specs and a DEI Power specialist will respond with configuration guidance, pricing, and lead time details within one business day.

Contact Us Today

For immediate assistance, feel free to give us a direct call at (866) 773-8050. You can also send us a quick email at sales@deipower.com.