
Switchgear
- Siemens OEM, UL 891 certified switchgear
- 400A to 4000A scalable amperage range
- In-house build for faster, reliable delivery
UL 891 Certified
EUSERC Approved
Siemens Approved OEM
DEI Power's 4000 Amp Main Distribution Panels at 480V include Service Entrance Switchgear, SES, Switchboards, Switchgear, Meter Mains, and Panelboards. Built with genuine Siemens components, UL 891 certified, and EUSERC Approved, these panels serve commercial, industrial, utility, and data center applications requiring reliable high-capacity power distribution.






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For a 4000-watt load, the required breaker size depends on your voltage and circuit configuration. As a general rule, breaker sizing is calculated by dividing wattage by voltage (Watts ÷ Volts = Amps). However, DEI Power's 4000A 480V main distribution panels are engineered for extremely high-capacity commercial, industrial, and utility applications — far beyond a single 4000-watt load. If you need help sizing a breaker or panel for your specific project, a DEI Power specialist can help you determine the correct configuration based on your facility's total load requirements and voltage setup.
Talk to our experts for custom solutions and tailored guidance.

High-capacity 480V panels delivering safe, code-compliant power distribution for large commercial facilities.

Rugged 4000A panels engineered for heavy electrical loads in industrial plants and processing environments.

Mission-critical 480V switchgear providing reliable power infrastructure for hyperscale and enterprise data centers.

EUSERC Approved panels built to utility specifications for substations and critical infrastructure power systems.
Talk to our experts for custom solutions and tailored guidance.
DEI Power manufactures switchgear in-house at a 50,000 sq. ft. facility in Ontario, CA, enabling faster builds, fewer delays, and free shipping in 3–5 business days.
As a Siemens Approved OEM, every panel is built with genuine Siemens components and UL 891 certified, ensuring code compliance, safety, and long-term reliability.
With over a decade serving commercial, industrial, and utility sectors, DEI Power delivers dedicated project support, in-house engineering, and proven power distribution solutions.
Submit your project details and a DEI Power specialist will respond with a custom quote, configuration guidance, and lead time confirmation.
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.
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.