Siemens 400 Amp 3-Phase Electrical Panels

DEI Power's 400A 3-phase panels are available in multiple voltage configurations including 120/240V, 240V, 208Y/120V, 240/120V, 480V, 480Y/277V, and 415/240V. Remote power panels emphasize 208Y/120V and 480Y/277V 3-phase, 4-wire configurations, which are standard for data center and commercial distribution applications.

Panelboards are compact, wall-mounted units for branch circuit distribution in commercial buildings. Switchboards are larger, floor-standing assemblies handling higher ampacities with more accessible service points. Switchgear offers the highest interrupting capacity and is used in utility, industrial, and data center applications where maximum fault protection and flexibility are required.

Yes. Panelboards, switchboards, switchgear, meter mains, service entrance switchgear, and SES units are all available in NEMA 3R weather-resistant enclosures for outdoor installation, in addition to NEMA 1 indoor configurations. Remote power panels are rated NEMA 1 (indoor only) and are designed for data center and enclosed facility environments.

Most in-stock 400A panel orders ship within 1 business day from DEI Power's 50,000 sq. ft. Ontario, California facility, with standard delivery in 3–5 business days. Built-to-order configurations, such as service entrance switchgear that must meet approved utility specifications, typically carry 4–6 week lead times. Free shipping is included on all orders.

DEI Power's panel lineup scales well beyond 400A. Panelboards, switchboards, switchgear, meter mains, SES, and service entrance switchgear are available from 400A up to 4,000A. Remote power panels are available from 225A to 1,600A. This range supports everything from mid-size commercial facilities to large industrial and utility infrastructure projects.

Yes. DEI Power's remote power panels (RPPs) are purpose-built for data centers, colocation facilities, AI compute environments, and healthcare facilities. They support up to 84 branch circuits with optional branch circuit monitoring, wall-mounted for space efficiency, and are stocked for emergency replacement and rush deployment where extended lead times are not acceptable.