Electrical Components Manufacturers
Sigma Four (Sigma4Inc)
3301 Technology Drive Suite #115
- Founded 1984
- AS 9100D, ISO 9001:2015
About Sigma Four (Sigma4Inc)
Sigma Four operates from Plano, Texas, where it was founded in 1984. The company is certified as a Minority Business Enterprise (MBE) and identifies as a minority-owned small business, a status it highlights as part of its founding philosophy. The firm provides full-service contract manufacturing centered on custom cable assemblies, wire harnesses, and electronic assemblies. It supports customers from design through production, offering engineering support and ITAR-registered production capabilities. The facility serves as the base for these operations. Sigma Four serves a range of sectors including telecommunications, medical technology, information technology hardware, aerospace and defence, instrumentation, cash management, and commercial product manufacturing. Its customer base spans companies that require both prototype quantities and full production volumes. The company emphasizes its U.S.-based manufacturing presence, flexibility to scale from prototypes to production, and a quality system anchored by AS9100D and ISO 9001:2015 certifications. It also maintains IPC/WHMA-A-620 compliance and UL/CSA adherence, positioning these standards as the foundation of its commitment to excellence and on-time delivery.
Manufacturing capabilities
Industries served
- Telecommunications
- Medical Technology
- Information Technology Hardware
- Aerospace / Defence
- Instrumentation
- Cash Management
- Commercial Product Manufacturing
Company details
- Location
- Plano, Texas
- Founded
- 1984
- Production volume
- Prototype quantities to production volumes
- Certifications
- AS 9100D, ISO 9001:2015, ITAR Registered, MBE (Minority Business Enterprise), IPC/WHMA-A-620, UL/CSA Compliant
- Listed under
Frequently asked questions
Where is Sigma Four (Sigma4Inc) located?
Sigma Four (Sigma4Inc) is located at 3301 Technology Drive Suite #115, Plano, Texas.
What does Sigma Four (Sigma4Inc) do?
Sigma Four (Sigma4Inc) is listed under Electrical Components Manufacturers, and its listed capabilities and products include Custom cable assembly, Wire harness manufacturing, Electronic assembly, Design-to-production contract manufacturing, Engineering support and ITAR-registered production.
What industries does Sigma Four (Sigma4Inc) serve?
Sigma Four (Sigma4Inc) lists Telecommunications, Medical Technology, Information Technology Hardware, Aerospace / Defence and Instrumentation among the industries it serves.
What certifications does Sigma Four (Sigma4Inc) have?
Certifications on file for Sigma Four (Sigma4Inc): AS 9100D, ISO 9001:2015, ITAR Registered, MBE (Minority Business Enterprise) and IPC/WHMA-A-620.
When was Sigma Four (Sigma4Inc) founded?
Sigma Four (Sigma4Inc) was founded in 1984.
How do I request a quote from Sigma Four (Sigma4Inc)?
Use the Request a quote button on this page to send Sigma Four (Sigma4Inc) your requirements through FirmsLedger, or call (972) 423-6474 and visit sigma4inc.com.
What companies are similar to Sigma Four (Sigma4Inc)?
Other Electrical Components Manufacturers in Texas listed on FirmsLedger include National Circuit Assembly, ACME Electronics and Mouser Electronics.