Shanghai Wayon Circuit Protection Co., Ltd, established in 1996, specializes in manufacturing, R & D and distribution of circuit protective components and protection circuit modules. Wayon is one of just a few companies in the world who possess the core techniques for PTC products. Wayon offers professional circuits protection solutions to its customers. With the possession of its own exclusive intellectual property, Wayon is one of the largest circuit protection component and module providers in mainland China.

Wayon's principal products include polymer-based PTC resettable fuses (PPTC), ceramic-based thermistors (CPTC), low-temperature alloy cutoffs (FUSE) and protection circuit modules (SCM & PCM), thyristor and Polymer-based electrostatic suppressor (PESD). All major products passed the UL, TUV and CSA approvals and are widely applied in many fields such as telecommunications, IT, automobile, battery, industrial consumer electronics etc. Wayon achieved ISO9002 in 1998, closely followed by QS9000 and ISO9001 in 2001. Wayon was also ISO14000 certified in 2003 and in 2006, Wayon passed the TS1649 Quality System recognition.