Seoul Semiconductor Has Achieved Qualification for the UL Witness Test Data Program for Testing LEDs and Modules

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UL WTDP reduces the time it takes Seoul Semiconductor to get the UL Mark for products targeted to overseas markets by allowing the company to perform testing in its own laboratories.

Acrich LED Module in Test at a Seoul Semiconductor Lab

Seoul Semiconductor (SSC), a global LED manufacturer (, has announced it has achieved qualification for the UL Witness Test Data Program (WTDP) allowing the company to conduct UL tests on LEDs and modules in its own laboratories, under the supervision of a UL engineer. This allows the company to build on its foundation of manufacturing high-quality LED products such as Acrich, MJT, and nPola by adding in-house testing for the international standards that customers require. An added benefit of UL WTDP is speeding product introductions to global markets through the reduction in the time it takes to get the UL mark.

Jeong Min Yeong, Chief of the Reliability Team, Seoul Semiconductor expressed, “We will continue to react quickly to the needs of the global LED lighting market as it rapidly grows by focusing on reinforcing our internal capabilities so we can quickly provide high-quality solutions for LED light sources as requested by our global customers."

Seoul Semiconductor continues to make improvements to maintain its high-quality standards and its commitment to innovation and customer service. It already holds certifications to ISO/IEC 17025 “General Requirements for the Competence of Testing and Calibration Laboratories” and ISO/TS 16949 “Quality Management Systems” as well as being part of the U.S. Environmental Protection Agency (EPA)’s list of recognized laboratories for conducting LM-80 testing in order to meet ENERGY STAR® requirements for solid state lighting products.

Seoul Semiconductor – About Us
Seoul Semiconductor ( manufactures and packages a wide selection of light emitting diodes (LEDs) for the automotive, general illumination/lighting, appliance, signage and back lighting markets. The company is the world’s fifth largest LED supplier, holding more than 10,000 patents globally, while offering a wide range of LED technology and production capacity in areas such as “nPola”, deep UV LEDs, "Acrich," the world’s first commercially produced AC LED, and "Acrich MJT - Multi-Junction Technology," a proprietary family of high-voltage LEDs. The company’s broad product portfolio includes a wide array of package and device choices such as AC driven LEDs, high-brightness LEDs, mid-power LEDs, side-view LEDs, through-hole type LED lamps, custom displays, and sensors. The company is vertically integrated from epitaxial growth and chip manufacture in its fully owned subsidiary, Seoul Optodevice, through packaged LEDs and LED modules in three Seoul Semiconductor manufacturing facilities. Seoul Optodevice also manufactures a wide range of unique deep-UV wavelength devices. The packaged LEDs and LED modules are available in North America through Avnet Electronics, Digi-Key Corporation and Mouser Electronics.

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Wankee Park
Seoul Semiconductor
+82 10 6355 8239
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