Switchgear
- Siemens Approved OEM manufacturing
- 400A to 4000A with 7 voltage options
- Seismic-rated: UBC, CBC & IBC compliant
UL 891 Certified
Siemens Approved OEM
EUSERC Approved
DEI Power's 1200A 480V Switchboard with LSIG Main Breaker delivers UL 891-certified, heavy-duty power distribution for commercial, industrial, and utility applications. Built with genuine Siemens components, available in NEMA 1 and NEMA 3R enclosures, and manufactured in-house at DEI Power's Ontario, California facility for fast, reliable deployment nationwide.
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LSIG stands for Long-time, Short-time, Instantaneous, and Ground-fault protection — the four trip functions built into an LSIG main breaker. In a 1200A 480V switchboard, this provides advanced, adjustable overcurrent and ground-fault protection, allowing precise coordination with downstream devices to improve system reliability, reduce nuisance tripping, and meet code requirements for large commercial and industrial installations.
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Reliable 1200A 480V switchboards powering lighting, HVAC, and critical loads across large commercial facilities.
Heavy-duty switchboards controlling and protecting large electrical loads in manufacturing plants and processing facilities.
Mission-critical 480V switchboards ensuring uninterrupted power for hyperscale and enterprise data center operations.
EUSERC-approved switchboards built to utility specifications for substations, service entrance, and infrastructure projects.
Talk to our experts for custom solutions and tailored guidance.
As an authorized Siemens OEM, every switchboard is built with genuine Siemens components, ensuring code compliance, precision, and long-term reliability.
Our 50,000 sq. ft. Ontario, CA facility enables in-house manufacturing, delivering UL 891-certified switchboards in 3–5 business days with free shipping.
From voltage and amperage configuration to seismic compliance, DEI Power provides dedicated project support and in-house engineering guidance start to finish.
Submit your project specs and a DEI Power specialist will respond with pricing, lead times, and configuration guidance within one business day.
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.