UL 891 Certified certified

UL 891 Certified

EUSERC Approved certified

EUSERC Approved

Siemens Approved OEM certified

Siemens Approved OEM

1200A 3-Pole Disconnect Switches — Heavy Duty

Heavy-duty 1200A 3-pole disconnect switches and associated power distribution equipment engineered for commercial, industrial, and utility applications. Built with genuine Siemens components, UL-listed assemblies, and NEMA 1/3R enclosures, these units deliver code-compliant, reliable power control and protection for high-demand electrical systems.

240V Switchgear NEMA 1/3R
1200 Amp SES NEMA 1/3R
1200 Amp Switchboard NEMA 1/3R
240/120V Switchboard NEMA 1/3R
480V Meter Main NEMA 1/3R
Switchgear
480V Service Entrance Switchgear NEMA 1/3R
415/240V Meter Main NEMA 1/3R
240V Meter Main NEMA 1/3R
Service Entrance Switchgear NEMA 1/3R
Meter Main NEMA 1/3R
240/120V Switchgear NEMA 1/3R
240V SES NEMA 1/3R
208Y/120V Panelboard NEMA 1/3R
1200A Switchgear NEMA 1/3R
Switchboard NEMA 1/3R
415/240V Service Entrance Switchgear NEMA 1/3R
1200 Amp Service Entrance Switchgear NEMA 1/3R
415/240V SES NEMA 1/3R
208Y/120V Switchgear NEMA 1/3R
SES (Service Entrance Section)
480V Switchgear NEMA 1/3R
240V Switchboard NEMA 1/3R
208Y/120V Switchboard NEMA 1/3R
Panelboard NEMA 1/3R
1200 Amp Meter Main NEMA 1/3R

Our Range of Products

240V Switchgear NEMA 1/3R

240V Switchgear NEMA 1/3R

  • 240V switchgear, wide amperage range
  • UL Listed & EUSERC Approved build
  • Genuine Siemens parts, seismic compliant
1200 Amp SES NEMA 1/3R

1200 Amp SES NEMA 1/3R

  • 1200A SES, 400A–4000A configurable
  • UL Listed, UL 891 & EUSERC Approved
  • NEMA 1/3R, 7 voltage options ready
1200 Amp Switchboard NEMA 1/3R

1200 Amp Switchboard NEMA 1/3R

  • 1200A switchboard, multi-voltage support
  • UL Listed & EUSERC Approved certified
  • Heavy-duty build with Siemens components
240/120V Switchboard NEMA 1/3R

240/120V Switchboard NEMA 1/3R

  • 240/120V switchboard, seismic compliant
  • UL Listed & EUSERC Approved assembly
  • Genuine Siemens components, NEMA 1/3R
480V Meter Main NEMA 1/3R

480V Meter Main NEMA 1/3R

  • NEMA 1 & 3R enclosures for indoor/outdoor
  • UL 891 & EUSERC certified for compliance
  • Built with genuine Siemens components
Switchgear

Switchgear

  • 400A–4000A low-voltage switchgear range
  • Siemens Approved OEM, UL 891 Certified
  • In-house build ensures faster delivery

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Frequently Asked Questions

What certifications do these 1200A heavy-duty disconnect switches carry?

These units carry UL Listed and UL 891 certifications for low-voltage assemblies, are EUSERC Approved for utility applications, and meet UBC, CBC, and IBC seismic zone requirements. DEI Power is also a Siemens Approved OEM, ensuring that all assemblies are built with genuine, authorized Siemens components.

What voltage configurations are available for 1200A heavy-duty disconnect equipment?

Are these disconnect switches suitable for outdoor installation?

What is the lead time and shipping policy for 1200A heavy-duty disconnect equipment?

Do these units need to be built to utility specifications?

What industries are these 1200A disconnect switches used in?

Are the assemblies seismically rated and compliant with building codes?

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

Provides reliable 1200A power control and distribution for office complexes, retail centers, and large commercial facilities.

Industrial & Manufacturing

Industrial & Manufacturing

Delivers heavy-duty load control and protection for manufacturing plants, processing facilities, and high-demand industrial operations.

Utility & Infrastructure

Utility & Infrastructure

Supports utility-grade service entrance and power distribution in substations and critical infrastructure projects.

Data Centers & Colocation

Data Centers & Colocation

Ensures uninterrupted, code-compliant power distribution for hyperscale, enterprise, and colocation data center environments.

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 Choose DEI Power

Siemens Approved OEM Manufacturing

Every assembly uses genuine Siemens components, backed by OEM authorization for precision-engineered, code-compliant power distribution equipment.

In-House Build, Faster Delivery

Our 50,000 sq. ft. Ontario, CA facility enables in-house manufacturing for faster lead times, free shipping, and 3–5 business day delivery nationwide.

10+ Years of Switchgear Expertise

Over a decade building UL 891-certified switchgear for commercial, industrial, and utility projects with dedicated engineering and project support.

Get a Quote for Your 1200A Disconnect Switch

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

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.