SanRex日本株式会社三社电机制作所创立于1933年，发展至今已有70余年的历史。SanRex三社电机自建立之初开发放映机用弧光灯电源以来，经长期的努力，现在已成为电力半导体和电源装置的专业生产厂商，为产业界的发展发挥了先锋作用。作为机电先端技术的领先者不断开发新技术推出新产品、以SanRex品牌为世界的产业界做出了贡献。 

SanRex三社电机于1962年实现了电力用可控硅的产品化并随着功率晶体管、IGBT及电力电子产品的发展，开发了各种功率元件。此外，还向各行各业提供了作为这类半导体元件应用产品的工业电源装置，优异的产品性能也受到国外用户的高度评价，在世界各国的市场上引人注目。 

SanRex三社电机在日本是上市公司，集团分设备和半导体两大部份，全年总销售额达到300亿日元。设备包括工业控制设备，电源设备，焊接设备等，占年销售额的60%；半导体包括晶片，可控硅，模块等。

SanRex三社电机总部设在日本大阪，在美国、德国、新加坡、韩国、泰国等海外国家都设有分公司，国内三社电机在香港、台湾和上海设有分公司。

Sansha Electric Mfg. Co. Ltd., the parent company of SanRex, is located in Osaka, Japan, and is an innovative, dynamic leader in the power electronics industry. Since developing choking coil automatic transformers for movie projectors in 1933, we have been one of the pioneers in the industrial world as a manufacturer of power semiconductors and power supply equipment.

In 1963, we started the manufacture of power thyristors and subsequently embarked on the development of power transistors, IGBT’s and other power semiconductor devices, keeping pace with developments in power electronics. We also applied these semiconductor devices to our industrial power supply equipment, which we provide to many industries.

Today, SanRex, is a company with an international presence, and whose name is synonymous with that of a preeminent supplier of highly engineered, reliable electronic solutions. Since its inception, Sansha has steadily grown into a company with about 1,000 employees worldwide, two manufacturing plants in Japan, one more in China and representative sales offices and service locations throughout Japan as well as in the US, Europe, China, Singapore, Korea and Taiwan. Our highly engineered products can be found around the world. The SanRex family of companies can truly meet your needs worldwide.

SanRex Corporation, a wholly owned subsidiary of Sansha Electric, was established in 1982 and is located in Port Washington, New York. SanRex Corporation supports our wide global base of customers in Canada, North, Central and South America, while our newly located Europe Branch Office, which opened in Slovenia in 2009, supports business in Europe, the Middle East, Russia and Africa. We are a highly respected supplier of Power Semiconductors, Plating Rectifiers, Lighting Ballasts, Plasma Power Supplies and Welding Equipment. Our Engineering Service Department is also available to provide you with service and technical assistance for all SanRex made products. Our fully trained technical staff carry out general in-house repairs as well as on-site repairs & maintenance.

SanRex Corporation is committed to maintaining and enhancing its leadership position by offering a more comprehensive and continually improved line of innovative power electronic products. We will also make every effort to remain a service-oriented and innovative company into the 21st Century.