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Sumitomo Electric Interconnect Products, INC.

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www.seipusa.com
Homepage of Sumitomo Electric Interconnect Products, INC.
Their homepage, crawled AUG 1, 2026
At a glance
Employees100-499
In business sinceNot reported
HeadquartersSan Marcos, CA
SAM.gov UEIMXS9XJGRRLS3
LISTED ON FACTORYREGISTRY100%SOURCE COVERAGE

Sumitomo Electric Interconnect Products Inc. manufactures heat shrink products, including heat shrink tubing, solder termination sleeves, crimp devices, and identification sleeves and cable markers produced through their SumiMark, Sumitag, and Sumilabel systems. The company serves the aerospace, military, automotive, industrial, commercial, medical, rail/transit, energy, and heavy equipment industries. Production takes place in the United States.

Summarized from the company’s own website

Their plant

FacilityCityStateEmployeesStatus
Sumitomo Electric Interconnect Products, INC.San MarcosCA100–499 ACTIVE

Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.