Company lists · Data refreshed September 2026

Top 25 Custom switchgear manufacturers based in the United States

Name: Custom switchgear manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 716 companies tracked

RevenueBase identified 716 custom switchgear manufacturers headquartered in the United States as of September 2026 and tracks 32,353 professional contacts across them, including 12,162 with verified work emails. Houston is the largest hub.

This list covers custom switchgear manufacturers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

716Companies

32,353Contacts tracked

12,162Verified emails

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The 25 largest custom switchgear manufacturers based in the United States

Ranked by team size

Top 25 of 716 custom switchgear manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to custom switchgear manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Schweitzer Engineering Laboratories SEL	Partial evidence	Pullman, WA, United StatesHQ checked Sep 30, 2026	5,001-10,000	6,489 contacts →
	Partial evidence “SEL is a globally recognized designer and manufacturer of products and solutions that make electric power safer, more reliable, and more economical.” Source: RevenueBase Database · checked Sep 30, 2026
2	Powell	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	2,561 contacts →
	Indirect evidence “Powell is hiring- Powell is dedicated to improving people’s lives by providing reliable power distribution systems in every market we serve.” Source: RevenueBase Database · checked Sep 30, 2026
3	Hubbell Power Systems	Partial evidence	Columbia, SC, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,079 contacts →
	Partial evidence “Hubbell Power Systems (HPS) designs and manufactures a wide variety of electric power transmission, distribution, substation, underground, OEM, and communications products used by…” Source: RevenueBase Database · checked Sep 30, 2026
4	Industrial Electric Mfg. IEM	Partial evidence	Fremont, CA, United StatesHQ checked Sep 30, 2026	1,001-5,000	969 contacts →
	Partial evidence “Industrial Electric Mfg.(IEM) is the largest independent full-line manufacturer of electrical distribution equipment and integrated power systems in the U.S.” Source: RevenueBase Database · checked Sep 30, 2026
5	Mitsubishi Electric Power Products, INC	Indirect evidence	Warrendale, PA, United StatesHQ checked Sep 30, 2026	1,001-5,000	967 contacts →
	Indirect evidence “Mitsubishi Electric Power Products, Inc.(MEPPI) is a leading U.S.” Source: RevenueBase Database · checked Sep 30, 2026
6	Dashiell Corporation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	940 contacts →
	Indirect evidence “Dashiell is a leading national provider of technical services to the electric utility, power generation, industrial, renewable and energy industries.” Source: RevenueBase Database · checked Sep 30, 2026
7	Flanders	Indirect evidence	Evansville, IN, United StatesHQ checked Sep 30, 2026	501-1,000	789 contacts →
	Indirect evidence “FLANDERS, Leverage our legacy.” Source: RevenueBase Database · checked Sep 30, 2026
8	Wholesale Electric Supply Co. Of Houston, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	501-1,000	544 contacts →
	Indirect evidence “Wholesale Electric Supply Company of Houston, Inc.” Source: RevenueBase Database · checked Sep 30, 2026
9	Resa Power	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	511 contacts →
	Indirect evidence “RESA Power is your ONE-STOP for all of your power needs.” Source: RevenueBase Database · checked Sep 30, 2026
10	EC Electric	Indirect evidence	Portland, OR, United StatesHQ checked Sep 30, 2026	1,001-5,000	490 contacts →
	Indirect evidence “Our lives function on a power grid.” Source: RevenueBase Database · checked Sep 30, 2026
11	Asco Power Technologies	Indirect evidence	Florham Park, NJ, United StatesHQ checked Sep 30, 2026	1,001-5,000	468 contacts →
	Indirect evidence “ASCO Power Technologies has provided power reliability solutions for more than 125 years.” Source: RevenueBase Database · checked Sep 30, 2026
12	Revere Electric Supply	Indirect evidence	Mokena, IL, United StatesHQ checked Sep 30, 2026	201-500	275 contacts →
	Indirect evidence “Revere Electric Supply is a 4th generation, family-owned, automation and electrical distributor that has been “Connecting People To Innovation Since 1919".” Source: RevenueBase Database · checked Sep 30, 2026
13	Milbank Energy At Work	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 30, 2026	501-1,000	266 contacts →
	Indirect evidence “Milbank provides the tools that empower life.” Source: RevenueBase Database · checked Sep 30, 2026
14	Crown Technical Systems	Indirect evidence	Fontana, CA, United StatesHQ checked Sep 30, 2026	201-500	241 contacts →
	Indirect evidence “Crown Technical Systems, a Flex company, is headquartered in Fontana, California, with additional production and engineering facilities in Dallas, Texas, and Ontario, Canada.” Source: RevenueBase Database · checked Sep 30, 2026
15	Systems Control	Partial evidence	Iron Mountain, MI, United StatesHQ checked Sep 30, 2026	501-1,000	240 contacts →
	Partial evidence “Systems Control, a Hubbell brand, designs and manufactures turnkey control systems and control relays that are involved in the protection and control of transmission and…” Source: RevenueBase Database · checked Sep 30, 2026
16	Electro-Mechanical	Indirect evidence	Bristol, VA, United StatesHQ checked Sep 30, 2026	501-1,000	221 contacts →
	Indirect evidence “Electro-Mechanical, LLC is a global leader in developing and manufacturing technologies used for electrical power distribution switching, power quality and power protection…” Source: RevenueBase Database · checked Sep 30, 2026
17	Superior Electric Great Lakes Company	Indirect evidence	Auburn Hills, MI, United StatesHQ checked Sep 30, 2026	51-200	219 contacts →
	Indirect evidence “Setting a Superior Standard for Electrical Solutions Since 1991 Based out of Auburn Hills, Michigan and serving industries internationally, Superior Electric Great Lakes Company…” Source: RevenueBase Database · checked Sep 30, 2026
18	Carling Technologies	Indirect evidence	Plainville, CT, United StatesHQ checked Sep 30, 2026	1,001-5,000	217 contacts →
	Indirect evidence “As a global leader in circuit protection, switching, and power distribution, Carling Technologies, a Littelfuse brand, is dedicated to developing modern, innovative solutions that…” Source: RevenueBase Database · checked Sep 30, 2026
19	Intermountain Electronics	Partial evidence	Price, UT, United StatesHQ checked Sep 30, 2026	501-1,000	208 contacts →
	Partial evidence “IE provides custom-engineered, packaged equipment to industrial markets.” Source: RevenueBase Database · checked Sep 30, 2026
20	Maverick Power	Indirect evidence	Mckinney, TX, United StatesHQ checked Sep 30, 2026	201-500	205 contacts →
	Indirect evidence “At Maverick Power, we are revolutionizing power solutions for businesses with a strong commitment to innovation, efficiency, and reliability.” Source: RevenueBase Database · checked Sep 30, 2026
21	Monti, INC	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 30, 2026	501-1,000	199 contacts →
	Indirect evidence “For over 50 years, Monti Inc.” Source: RevenueBase Database · checked Sep 30, 2026
22	Russelectric, A Siemens Business	Indirect evidence	Hingham, MA, United StatesHQ checked Sep 30, 2026	201-500	193 contacts →
	Indirect evidence “Founded in 1955, Russelectric®, A Siemens Business, provides high-integrity power control solutions for mission critical applications in the healthcare, information technology…” Source: RevenueBase Database · checked Sep 30, 2026
23	Aubrey Silvey Enterprises, INC	Indirect evidence	Carrollton, GA, United StatesHQ checked Sep 30, 2026	201-500	192 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
24	Expanse Electrical CO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	501-1,000	188 contacts →
	Indirect evidence “Expanse Electrical Company is a premier provider of integrated electrical infrastructure, instrumentation and automation system solutions.” Source: RevenueBase Database · checked Sep 30, 2026
25	The Durham Company	Indirect evidence	Lebanon, MO, United StatesHQ checked Sep 30, 2026	501-1,000	187 contacts →
	Indirect evidence “The Durham Company specializes in the Design, Manufacturing, and Sales of products in the Electrical Utility Marketplace.” Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: custom switchgear manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names custom switchgear manufacturers.
Partial evidence: Its own public description names part of custom switchgear manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom switchgear manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 716 custom switchgear manufacturers based in the United States

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Custom switchgear manufacturers based in the United States at a glance

As of Sep 30, 2026

37.6%Verified-email coverage

45.2Average contacts per company

11-50Median size (employees)

4.7%Largest-city concentration · Houston

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

232

11-50

257

51-200

144

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 716 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among custom switchgear manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “custom switchgear manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names custom switchgear manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among custom switchgear manufacturers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 12,162 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Custom switchgear manufacturers by metro

Custom switchgear manufacturers in Houston34

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names custom switchgear manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many custom switchgear manufacturers are there based in the United States?

RevenueBase identified 716 custom switchgear manufacturers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Schweitzer Engineering Laboratories SEL, headquartered in Pullman, tops this list with the largest team on record.

Which city has the most custom switchgear manufacturers?

Houston leads with 34 headquartered companies, followed by Los Angeles (8) and Charlotte (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 12,162 verified decision-maker contacts tracked across these 716 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.