• In 1970
    Capital increased up to NT$ 6 million (US$150,000), we imported foreign advanced technology to produce high & low voltage capacitors.
  • In 1973
    Capital reached to NT$ 10 million, and the company was certified as a qualified factory by Taiwan Power Company.
  • In 1977
    The company was rated grade A in terms of qualified exporter and quality control factory by Merchandise Office of Economic Association (MOEA). Taipei branch has been established since.
  • In 1978
    High & low voltage capacitors were granted the No.2845 and 2846 CNS Mark by Central Standard Department. Kaoshiung branch has been established since.
  • In 1979
    With increasing capital of NT$19 million (US$ 500,000), square type capacitors used for electrical apparatus were successfully developed.
  • In 1983
    With capital of NT$ 30 million (US$ 750,000), MF low voltage capacitors were successfully developed.
  • In 1985
    Capacitors for induction cookers and microwave were developed.
  • In 1987
    With capital of NT$36 million (US$1,200,000) and increase of factory area 1,800 square meters, new model dry type capacitors, YE-P type, used for internal protection of electrical apparatus were approved by American UL standard.
  • In 1988
    With capital of NT$50 million (US$1,750,000), emergency lights were granted the No.5053 CNS Mark by Central Standard Department.
  • In 1990
    With capital of NT$60 million (US$2,220,000), 7.35KV and 14.7KV capacitors were certified by Taiwan Power Company.
  • In 1992
    Capacitors for electrical apparatus were approved by American UL standard. Taoyung branch has been established since.
  • In 1994
    With capital of NT$80 million (US$3 million), capacitors, S series, used for electrical apparatus were certified by Germany VDE standard. Quality approval of ISO 9002 standard were certified.
  • In 1994
    Acquired ISO 9002 for capacitors.
  • In 1997
    Acquired ISO 9002 for emergency lights.
  • In 2001
    Acquired ISO 9001:2000 for capacitors.
  • In 2003
    JUL: Successfully make Round type Aluminum can dry-type low voltage capacitors.
  • In 2004
    NOV: Acquired ISO 9001 for capacitor bank and Module capacitors.
  • In 2005
    JAN: Successfully make Copper-bar Conduction Cooling high frequency capacitors.
    JUL: All electric apparatus capacitors conform RoHS requirements.
  • In 2009
    OCT: Acquired ISO 9001:2008 by BSMI.
  • In 2010
    New design capacitor banks with individual phase compensation for Taichung new city hall.
  • In 2012
    FEB: Acquired CSA and UL 810 AFC 10000A Safety approval for type YBP capacitors.
    AUG: Acquired VDE approval for motor running capacitors 400Vac 1µF to 7µF (P0, ClassB)
  • In 2015
    Successfully make downsizing oil-type low voltage capacitors with flat elements.
    Acquired UL safety approval for additional ranges of YFP capacitors.
  • In 2016
    OCT: Renew a set of precision C & DF meter for high voltage capacitors Producing power electronics capacitors.
    NOV: Acquired UL 810 AFC 10000A safety approval for C-type N2-filling low voltage capacitors.
    Acquired ISO 9001:2008 by ETC in Taiwan.
  • In 2017
    Acquired VDE approval with safety S3 and life class C for box style motor running capacitors 450Vac 1.5 to 8 uF.
    MAY: Celebrated the 50-th anniversary of the founding of Yuhchang.
    NOV: Acquired ISO 9001:2015 by ETC in Taiwan.
  • In 2018
    DEC: Acquired TUV approval for box style motor running capacitors.