UL 891 Certified certified

UL 891 Certified

Siemens Approved OEM certified

Siemens Approved OEM

EUSERC Approved certified

EUSERC Approved

Front-Connected Switchboards

DEI Power's front-connected switchboards deliver UL 891-certified, code-compliant power distribution for commercial, industrial, and utility applications. Built with genuine Siemens components and available in NEMA 1 or NEMA 3R enclosures, these switchboards support amperage ranges from 400A to 4000A across multiple voltage configurations.

Switchgear
Switchboard NEMA 1/3R

Our Range of Products

Switchgear

Switchgear

  • 400A to 4000A scalable power capacity
  • UL 891 & Siemens Approved OEM certified
  • NEMA 1/3R for indoor & outdoor installs
Switchboard NEMA 1/3R

Switchboard NEMA 1/3R

  • 400A–4000A amperage range options
  • NEMA 1 & 3R indoor/outdoor enclosures
  • UL 891 certified with Siemens components

Frequently Asked Questions

What is a Siemens electrical panel?

A Siemens electrical panel is a power distribution assembly built with genuine Siemens components, designed to safely distribute electricity throughout a building or facility. DEI Power's front-connected switchboards are built as Siemens Approved OEM products, meaning they incorporate genuine Siemens components — including Siemens breakers — to ensure precision-engineered, code-compliant performance for commercial, industrial, and utility applications.

How to reset a tripped Siemens breaker?

Does Siemens make circuit breakers?

What amperage ratings are available for front-connected switchboards?

What voltage options do DEI Power switchboards support?

What is the difference between NEMA 1 and NEMA 3R enclosures?

Are DEI Power switchboards UL 891 certified and seismic compliant?

What industries are DEI Power front-connected switchboards designed to serve?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Commercial Buildings

Commercial Buildings

Reliable switchboard solutions for office campuses, retail centers, and mixed-use developments requiring safe, high-capacity power distribution.

Industrial & Manufacturing

Industrial & Manufacturing

Heavy-duty switchboards built for demanding industrial environments, supporting large electrical loads and continuous production operations.

Data Centers & Colocation

Data Centers & Colocation

High-amperage switchgear supporting uptime-critical data center and colocation facilities with scalable power distribution infrastructure.

Utility & Infrastructure

Utility & Infrastructure

EUSERC-approved switchboards designed for utility substations and infrastructure projects requiring strict compliance and long-term reliability.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Why Contractors & Engineers Choose DEI Power

Siemens Approved OEM Manufacturing

Every switchboard is built with genuine Siemens components under Siemens Approved OEM authorization, ensuring precision-engineered, code-compliant performance.

Fastest Lead Times in the Industry

In-house manufacturing at our 50,000 sq. ft. Ontario, CA facility enables faster builds, fewer delays, and free shipping in 3–5 business days.

10+ Years of Switchgear Expertise

Over a decade engineering UL 891-certified switchboards for commercial, industrial, and utility projects, with in-house design support and post-installation service.

Get a Quote for Your Switchboard Project Today

Submit your specs and a DEI Power expert will respond with configuration guidance, pricing, and lead time 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.