This part is a kind of semiconductor called K3199.
Function of this product has 2SK3199.
Manufacturers : Sanken Electric
Image and pinout :

Some of the text within the PDF file :
2SK3199 Absolute Maximum Ratings Symbol VDSS VGSS ID ID (pulse) *1 PD EAS *2 I AS Tch Tstg Ratings 500 ± 30 ±5 ± 20 30 (Tc = 25ºC) 35 5 150 –55 to +150 External dimensions 1 .. FM20 (Ta = 25ºC) Electrical Characteristics Symbol V(BR) DSS I GSS I DSS VTH Re (yfs) RDS(on) Ciss Coss Crss t d(on) tr t d(off) tf VSD t rr 2.0 3.5 3.0 5.2 1.2 650 250 110 18 30 60 65 0.9 2 1.5 1.5 min 500 Ratings typ max ± 100 100 4.0 Unit V nA µA V S Ω pF pF pF ns ns ns ns V µs (Ta = 25ºC) Unit V V A A W mJ A ºC ºC Conditions I D = 100µA, VGS = 0V VGS = ± 30V VDS = 500V, VGS = 0V VDS = 10V, I D = 1mA VDS = 20V, I D = 2.5A VGS = 10V, I D = 2.5A VDS = 10V, f = 1.0MHz, VGS = 0V PW 100µs, duty cycle 1% * 1: 2: VDD = 30V, L = 2.6mH, I L = 5A, * See Figure 1 on Page 5. [ ... ]
K3199 PDF Datasheet Download
