Our Commitment to Quality
With an ISO 9001 certified facility, our production includes extensive quality controls through pre-production, preliminary manufacturing, kitting, and final testing phases for all products and assemblies. Our commitment to quality, efficiency, and intellectual property protection provides clients with the confidence they need to trust Sigma as their partner for advanced magnetic component solutions.
Sigma’s quality control measures include comprehensive checklists at each stage of the process and a thorough testing process. This includes a first-piece inspection to validate the build before full production, preliminary test after production and final testing following impregnation.Test reports available with each shipment upon request.
Automated Testing: DC Resistance, Winding DC Resistance Match, Inductance, Inductance Match, Q Factor, Equivalent Series Resistance (RLS), Winding Impedance, Leaking Inductance, Interwinding Capacitance, Capacitance Match, Turns Ratio, Magnetising Current, No-Load Voltage, Leakage Current, Insulation Resistance (up to 7000V), Hi-Pot DC (up to 7000V), Hi-Pot AC (up to 5500V), Surge Stress Test (up to 5000V).
Manual Testing: HP 4194 Impedance Analyzer, Wayne Kerr 3260B Precision Inductance Analyzer, Insulation Resistance Tester Megger MIT430, Manual Hipot Hipotronics 100 Series, Manual Hipot – Vitrek 955i Electrical Safety Compliance Analyzer, BK Precision Frequency Generator, GW Instek Oscilloscope, Special Manual Test Set-ups per customer specification
Sigma Engineering Expertise
Sigma can design to rigorous standards, such as UL, CSA, VDE, and MIL-T-27E specifications, ensuring compliance with industry requirements. We offer comprehensive design and manufacturing services, including full design for manufacturing from build to spec, rapid prototyping through our Fast Track Engineering Sample Program, and remote or in-person design reviews for manufacturability and documentation updates. Our support extends to technical assistance for all designs and seamless engineering-to-engineering collaboration to ensure optimal outcomes.
We prioritize intellectual property protection, ensuring clients retain ownership of their designs and drawings for flexibility throughout the product lifecycle while safeguarding proprietary part numbers.
Streamlined Manufacturing Capabilities
We provide a wide range of manufacturing options, including vacuum impregnation, encapsulation, open-frame, canned, molded, and fully encapsulated designs, along with custom mounting and termination solutions tailored to your needs. To further enhance our offerings, we incorporate features such as EMI/RFI shielding and provide video documentation of prototype manufacturing for added transparency and quality assurance.
Our manufacturing capabilities encompass a wide range of advanced techniques to ensure efficiency and quality in every project. We specialize in winding up to 46 AWG magnetic wire, Litz wire, and foil, square, or round wire, using both automatic machine winding and manual shuttle or hook winding methods. Our winding expertise includes bobbin, winding form, and self-supporting winding. Additional services include wire preparation, harness assembly, and IPC-A-610 certified soldering with options for HMP or lead-free solder, all designed to deliver superior performance and reliability.
