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shangHai upun electric co.,ltd established in 1995, specializes in the development, manufacture and service of electrical connectors and electrical automation products. innovation is the source power of development for upun. ,the combination of development and research and production, make a high efficient technical and qualified team which deal with any complicated problems and solution system. upun have iso9001 quality, iso14004,ccc, cqc, ce, ul, vde, ccs, rohs and ex certificates and approals, have more than 100 patents. upun listed in “key unit of patent cultivated”by Shanghai Intellectual Property Office. And awarded “Abide by contract, Attach importance to credit” Certificate issued by Shanghai Administration for Industry and Commerce in 2006. Our main products have terminal blocks, busbar, din power supply, photoelectric/relay coupling terminal blocks, overvoltage protective blocks, plc photoelectric/relay module, analog signal isolator, interface module, surge protection device, reactive power automatic compensation controller, cable splitter blocks, push button, indicator light, terminals and tools.