This part is a kind of semiconductor called QM12N70F.

Function of this product has N-Ch 700V Fast Switching MOSFETs.

Manufacturers : UBIQ

Image and pinout :

Some of the text within the PDF file :

QM12N70F 機密 第1頁 2011-09-09 - 1 - N-Ch 700V Fast Switching MOSFETs General Description The QM12N70F is the highest performance N-ch MOSFETs with specialized high voltage technology, which provide excellent RDSON and gate charge for most of the SPS, Charger ,Adapter and lighting applications . The QM12N70F meet the RoHS and Green Product requirement , 100% EAS guaranteed with full function reliability approved. Features z Super Low Gate Charge z Excellent CdV/dt effect decline z 100% EAS Guaranteed z Green Device Available Product Summery BVDSS 700V RDSON 1Ω ID 12A Applications z High efficient switched mode power supplies z Electronic lamp ballast z LCD TV/ Monitor z Adapter TO220F Pin Configuration Absolute Maximum Ratings Symbol VDS VGS ID@TC=25℃ ID@TC=100℃ IDM E [ ... ]

QM12N70F PDF Datasheet Download