Stc INC

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Their homepage, crawled AUG 1, 2026

At a glance

EmployeesNot reported

In business sinceNot reported

Industry

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing

HeadquartersMcleansboro, IL

SAM.gov UEIN7W7EM9NLHD6

Sun Transformer manufactures custom electronic transformers and inductors, including coils, toroids, high-voltage transformers, power transformers, isolation transformers, autotransformers, and ferroresonant transformers, with capability up to 5 KVA. The company serves aerospace, avionics, medical, defense, military, environmental, renewable energy, marine, broadcast electronics, commercial, and industrial industries. The company holds ISO 9001:2015 certification and is ITAR registered.

Facility	City	State	Employees	Status
Stc INC	Mcleansboro	IL	—	● 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.