Case Study · Semiconductor

1200A switchboards for Intel, one shipped in 20 days

Built for Mazzuca Contracting, for Intel

Jul 2026 – Sep 2026 a six-figure program

Key facts

The build at a glance

2 switchboard orders

Orders

Switchboards and a panelboard

Product

1200A switchboards; 225A panelboard

Amperage

208Y/120V and 415Y/240V

Voltage

Copper (1200A MLO board); aluminum (first order)

Bus

NEMA 1 (indoor)

Enclosure

65 kAIC

Interrupting rating

UL 891 low-voltage switchboards

Listing

Siemens 3VA: 1200A LSIG main and LSI feeders (first order); 225A LSI feeders (second order)

Switchboard breakers

20 days from order to shipment (1200A board, September 2026)

Turnaround

Jurupa Valley, California

Built in

01 · Challenge

The challenge

For Intel, Mazzuca Contracting ordered 1200A switchboards in two rounds: the first went to the engineer of record for review in July 2026, and the second was placed as an expedite in September 2026.

02 · Build

What DEI built

The first order is 1200A UL 891 low-voltage switchboard equipment at 415Y/240V with aluminum bus, 65 kAIC and NEMA 1, built around a Siemens 3VA 1200A main with an LSIG trip unit and LSI feeders, together with a 225A panelboard at 208Y/120V. The second order is a 1200A main-lug-only UL 891 low-voltage switchboard at 208Y/120V with copper bus, Siemens 3VA LSI feeders, 65 kAIC and NEMA 1.

QtyItemRatingVoltageEnclosureBusNotes
1Switchboard1200A415Y/240V 3Ø 4WNEMA 1AluminumSiemens 3VA LSIG main; 65 kAIC; UL 891 low-voltage
1Panelboard225A208Y/120V 3Ø 4WNEMA 1Aluminum225A main; 65 kAIC
1Switchboard, main lug only1200A208Y/120V 3Ø 4WNEMA 1Copper65 kAIC; UL 891 low-voltage

03 · Delivery

How DEI delivered

This rail follows Order 2 of 2, shipped Sep 2026. Remaining orders: expected ship through Q3 2026.

Sep 2026
Order
Sep 2026
Engineering
Sep 2026
Fabrication & bus bar
Sep 2026
Assembly
Sep 2026
QC
Sep 2026
Shipped

Engineered, fabricated and assembled under one roof in Jurupa Valley, California.

The 1200A copper-bus board was ordered in September 2026; engineering released it 8 days later, it was ready to ship on day 17 and shipped on day 20. The first order has cleared assembly and is in packaging as of September 2026.

DEI’s facility in Jurupa Valley, California
Photographed at DEI’s shop, Jurupa Valley, California.

04 · Result

The result

A 1200A switchboard went from order to shipment in under three weeks for a semiconductor manufacturer, within a six-figure program for one contractor.

05 · Specifications

Specifications, build by build

Order 1 — 1200A switchboard equipment and a 225A panelboard

From DEI’s submittal, Jul 2026

QtyItemRatingVoltageEnclosureBusNotes
1Switchboard1200A415Y/240V 3Ø 4WNEMA 1AluminumSiemens 3VA LSIG main; 65 kAIC; UL 891 low-voltage
1Panelboard225A208Y/120V 3Ø 4WNEMA 1Aluminum225A main; 65 kAIC
  • UL 891 low-voltage switchboard equipment, 1200A, 415Y/240V, 3-phase 4-wire, aluminum bus, 65 kAIC, NEMA 1
  • Siemens 3VA 1200A main with LSIG trip unit
  • 225A panelboard, 208Y/120V, 65 kAIC, NEMA 1
  • Siemens 3VA feeders with LSI trip units: 800A, 400A and 125A frames

From DEI’s submittal, Sep 2026

QtyItemRatingVoltageEnclosureBusNotes
1Switchboard, main lug only1200A208Y/120V 3Ø 4WNEMA 1Copper65 kAIC; UL 891 low-voltage
  • UL 891 low-voltage switchboard, 1200A main lug only, 208Y/120V, 3-phase 4-wire
  • Copper bus; 65 kAIC; NEMA 1
  • Placed as an expedite; shipped 20 days after the order

06 · Related

Related case studies

Send us your one-line diagram — we'll tell you what we'd build, and when.

Company names identify who DEI’s orders are for. Their use does not imply endorsement of DEI.

Dates, quantities and turnarounds as of September 2026, from DEI’s build and order records. Images are representative unless marked otherwise.

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Office Location

4725 Troy Ct.
Jurupa Valley CA 92509

Contact Info

Phone: +1 (866) 773-8050
Email: sales@deipower.com

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