Recently, Hongfa obtained the explosion-proof system IECQAR certification issued by UL certification authority, which is the first explosion-proof system certificate obtained by the domestic relay industry.

Siemens Chengdu Branch, in its PLC project development process, selected parts and components and proposed that the relay should meet the requirements of explosion-proof IECQAR. Hongfa takes "Xiamen Hongfa Electroacoustic Co., Ltd." as the certification place, "Zhangzhou Hongfa Electroacoustic Co., Ltd." as the manufacturing place, and takes the explosion-proof relay HF49FD as the main body of the product, and implements the standard explosion-proof system ISO/IEC80079-34:2018. During the implementation of the explosion-proof management system, all parties worked together to link up all key links, and accumulated valuable experience for the follow-up implementation of other industrial relay explosion-proof systems in the company.