estpac Electronics(威柏電子)創辦於1992年，爲日本富士電機(FUJI ELECTRIC)半導體器件之中國及香港地區獨家代理。
主要産品爲富士電機二極管、三極管、場效應管、電源管理IC、IGBT及IPM、PIM、IGBT驅動、功率模塊等。
其後公司於1996年成爲BC Component分立元件分銷商及2005年正式成爲VISHAY國內汽車生産市場全線産品代理及各電子產品之分立元件代理。
威柏針對工業電力電子領域以FUJI ELECTRIC富士電機IGBT模塊（包括IPM、PIM、IGBT driver）為核心，配合國際知名品質功率器件：晶閘管SCR、電力MOSFET、MOSFET模塊，電力二極管、二極管模塊、單相整流橋、三相整流橋等。同時可以為客戶提供IGBT驅動方案及配套單片機MCU、DSP、高速光耦、高品質平波用鋁電解電容及薄膜電容、IGBT突波吸收電容等元件。在不間斷電源UPS、Inveter變頻器、NC.servo數控伺服、醫療電源、通訊電源、電動汽車、風力太陽能發電等領域與客戶戰略合作，全力支持中國電力電子工業發展！
威柏代理的Fuji Electric Semiconductors 富士电机IGBT主要产品有：
1MBC03-120SC
1MBC10D-060SC
1MBC15-060SC
1MBH10D-120
1MBH25-120SC
1MBH25D-120SC
1MBH50D-060SC
1MBH60-100SC
1MBH60D-100SC
1MBH75D-060SSC
1MBI2400U4D-120
1MBI300S-120B
1MBI300U4-120
1MBI3600U4D-120
1MBI400S-120B
1MBI400U4-120
1MBI600PX-120
1MBI600PX-140
1MBI600U4-120
1MBI600U4B-120
1MBI1600U4C-120
1MBI1600U4C-170
1MBI800U4B-120
1MBK50D-060SSC
2MBI100N-060
2MBI100N-120
2MBI100NC-120
2MBI100PC-140
2MBI100S-120
2MBI100SC-120
2MBI100TA-060
2MBI100U4A-120
2MBI100U4H-170
2MBI150N-060
2MBI150N-120
2MBI150NC-120
2MBI150PC-140
2MBI150S-120
2MBI150SC-120
2MBI150TA-060-50
2MBI150U2A-060
2MBI150U4A-120
2MBI150U4B-120
2MBI150U4H-120
2MBI150U4H-170
2MBI200N-060
2MBI200N-120
2MBI200PB-140
2MBI200S-120
2MBI200U2A-060
2MBI200U4B-120
2MBI200U4D-120
2MBI200U4H-120
2MBI200U4H-170
2MBI225U4N-120-50
2MBI300N-060
2MBI300P-140
2MBI300S-120
2MBI300U2B-060
2MBI300U4D-120
2MBI300U4E-120
2MBI300U4H-120
2MBI300U4H-170
2MBI300U4N-120-50
2MBI400N-060
2MBI400U2B-060
2MBI400U4H-120
2MBI400U4H-170
2MBI450U4E-120
2MBI450U4N-120-50
2MBI450U4N-170-50
2MBI450VJ-120-50
2MBI50P-140
2MBI50N-060
2MBI50N-120
2MBI600NT-060
2MBI600U2E-060
2MBI75N-060
2MBI75N-120
2MBI75P-140
2MBI75S-120
2MBI75U4A-120
2MBI800U4G-170
4MBI100T-060
4MBI150T-060
4MBI75T-060
6MBI100S-120
6MBI100U4B-120
6MBI100U2B-060
6MBI150U4B-120
6MBI25S-120
6MBI35S-120
6MBI50S-120
6MBI225U4-120
6MBI300U4-120
6MBI450U4-120
6MBI50U4A-120
6MBI75U4A-120
6MBI75U4B-120
6MBP100RA060-05
6MBP100RTB060
6MBP100TEA060
6MBP150RA060-05
6MBP150RA120-05
6MBP150RTB060
6MBP150TEA060
6MBP15RH060
6MBP200RA060
6MBP20RH060-50
6MBP25RA120-05
6MBP25TEA120
6MBP300RA060
6MBP30RH060
6MBP50RA060-05
6MBP50RA120-05
6MBP50RTB060
6MBP50TEA060
6MBP50TEA120
6MBP75RA060-05
6MBP75RA060-55(rohs)
6MBP75RA120-05
6MBP75RTB060
6MBP75RU2A120-50
6MBP75TEA060
6MBP75TEA120
7MBP100RA060-05
7MBP100RA120-05
7MBP100TEA060
7MBP150RA060-05
7MBP150RA120-05
7MBP150TEA060
7MBP200RA060
7MBP25RA120-05
7MBP25TEA120
7MBP300RA060
7MBP50RA060-05
7MBP50RA120-05
7MBP50RJ120-05
7MBP50TEA060
7MBP50TEA120
7MBP75RA060-05
7MBP75RA120-55
7MBP75RA120-55
7MBP75TEA060
7MBP75TEA120
7MBR100RTB060
7MBR100SB060
7MBR100U2B060
7MBR100U4B120
7MBR10SA120
7MBR150RTB060
7MBR15SA120
7MBR20SA060
7MBR25SA120
7MBR25VM120-50
7MBR30SA060/-50
7MBR30U2A060
7MBR35SB120
7MBR35VM120-50
7MBR50RTB060
7MBR50SA060
7MBR50SB060
7MBR50SB120
7MBR50SD120
7MBR50U2A060
7MBR50UA120
7MBR50VM120-50
7MBR75RTB060
7MBR75SB120
7MBR75SB060
7MBR75U2B060
7MBR75U4B120
7MBR75VN120-50
VLA517-01R
6RI100E-080
6MBI100VA-120-50
6MBI50VA-120-50
6MBI75VA-120-50
6MBI100VW-120-50
6MBI50VW-120-50
6MBI75VW-120-50
6MBI100VB-120-50
6MBI150VB-120-50
6MBI180VB-120-50
6MBI100VX-120-50
6MBI150VX-120-51
2MBI225VN-120-50
2MBI300VN-120-50
2MBI450VN-120-50
2MBI600VN-120-50
2MBI225VJ-120-50
2MBI300VJ-120-50
2MBI450VJ-120-50
2MBI600VJ-120-50
6MBI225V-120-50
6MBI300V-120-50
6MBI450V-120-50
6MBI550V-120-50
1MBI200HH-120L-50
1MBI300HH-120L-50
1MBI400HH-120L-50
2MBI100HB-120-50
2MBI150HH-120-50
2MBI200HH-120-50
7MBR25VY120-50
7MBR35VY120-50
7MBR50VY120-50
7MBR25VW120-50
7MBR35VW120-50
7MBR50VW120-50
7MBR100VP060-50
7MBR25VP120-50
7MBR35VP120-50
7MBR50VP060-50
7MBR50VP120-50
7MBR75VP060-50
7MBR25VM120-50
7MBR35VM120-50
7MBR50VM120-50
7MBR100VZ120-50
7MBR150VZ120-50
7MBR50VZ120-50
7MBR75VZ120-50
7MBR150VX120-50
7MBR50VX120-50
7MBR75VX120-50
7MBR100VR120-50
7MBR150VR060-50
7MBR150VR120-50
7MBR50VR120-50
7MBR75VR120-50
7MBR100VN120-50
7MBR150VN120-50
7MBR50VN120-50
7MBR75VN120-50
2MBI600VXA-120-50
2MBI650VXA-170-50
2MBI900VXA-120-50
2MBI1000VXB-170-50
2MBI1400VXB-120-50
