
240V Switchgear NEMA 1/3R
- 240V switchgear, wide amperage range
- UL Listed & EUSERC Approved build
- Genuine Siemens parts, seismic compliant
UL 891 Certified
EUSERC Approved
Siemens Approved OEM
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.


























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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.
Talk to our experts for custom solutions and tailored guidance.

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

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

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

Ensures uninterrupted, code-compliant power distribution for hyperscale, enterprise, and colocation data center environments.
Talk to our experts for custom solutions and tailored guidance.
Every assembly uses genuine Siemens components, backed by OEM authorization for precision-engineered, code-compliant power distribution equipment.
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.
Over a decade building UL 891-certified switchgear for commercial, industrial, and utility projects with dedicated engineering and project support.
Submit your project specs and a DEI Power specialist will respond with pricing, configuration guidance, and lead time details.
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.