Manufacturing of relays for electronic circuitry, industrial control overload, and switchgear-type

Facility	City	State	Employees	Status
National Electric Coil	Brownsville	TX	100–499	● ACTIVE
Northeast Power Systems, INC.	Queensbury	NY	20–99	● ACTIVE
Nova Measuring Instruments INC.	Fremont	CA	100–499	● ACTIVE
Pacific Instruments, INC.	Concord	CA	20–99	● ACTIVE
Polarity INC.	Rancho Cordova	CA	20–99	● ACTIVE
Precision Filters, INC.	Ithaca	NY	20–99	● ACTIVE
Prime Technology LLC	North Branford	CT	20–99	● ACTIVE
QTQa Technology Company, INC.	Hampton	NH	20–99	● ACTIVE
Ramco Electric Motors, INC.	Greenville	OH	100–499	● ACTIVE
Royal Switchgear Manufacturing Company, LLC	Bessemer	AL	100–499	● ACTIVE
S&c Electric Company	Chicago	IL	—	● ACTIVE
Southern States LLC	Hampton	GA	500+	● ACTIVE
Staco Systems, INC.	Irvine	CA	20–99	● ACTIVE
Stature Electric, INC.	Watertown	NY	20–99	● ACTIVE
Technibus, INC.	Canton	OH	100–499	● ACTIVE
Teledyne Energy Systems, INC	Hunt Valley	MD	20–99	● ACTIVE
Tempo Communications, INC.	Vista	CA	100–499	● ACTIVE
Tesco Controls, LLC	Sacramento	CA	100–499	● ACTIVE
Trackonomy Systems INC	San Jose	CA	100–499	● ACTIVE
TCTreadwell Corporation (delaware)	Thomaston	CT	20–99	● ACTIVE
Trellisware Technologies INC	San Diego	CA	100–499	● ACTIVE
Virginia Panel Corporation	Waynesboro	VA	100–499	● ACTIVE
Yokogawa Corporation of America	Newnan	GA	100–499	● ACTIVE
ZAZ a X Millimeter Wave Corporation	Upland	CA	—	● ACTIVE
Absolute Testing Services, INC.	Houston	TX	20–99	● ACTIVE

FactoryRegistry lists 2,174 facilities whose primary industry classification is one of the 3 industries above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced relays for electronic circuitry, industrial control overload, and switchgear-type, in the shares shown above, and does not say which establishments. Where a plant’s own website or a federal registry names what that plant makes, it appears on the plant’s own page with the source named.

The U.S. Census Bureau recorded this product line in 3 US manufacturing industries in the 2022 Economic Census, as the most specific line those industries reported. At least 59 establishments reported producing it; the count for 1 of those industries was withheld.

These are counts of establishments by industry: the Economic Census publishes them as industry totals and never as a list of plants.

NAPCS collection code 2033950000. Source for the product line, the establishment counts and the shares: U.S. Census Bureau, 2022 Economic Census (ECNNAPCSIND2022). Federal source data is public domain. Facility records are compiled separately by FactoryRegistry and carry their own sources.