This post explains for the K3326 mosfet.
The Part Number is 2SK3326.
The function of this semiconductor is 500V, 10A, MOSFET.
The package is TO-220 Type.
Preview images :
K3326 is N-Channel DMOS FET device that features a low gate charge and excellent switching characteristics, and designed for high voltage applications such as switching power supply, AC adapter.
• Low gate charge : QG = 22 nC TYP. (VDD = 400 V, VGS = 10 V, ID = 10 A)
• Gate voltage rating : ±30 V
• Low on-state resistance : RDS(on) = 0.85 Ω MAX. (VGS = 10 V, ID = 5.0 A)
• Avalanche capability ratings
• Isolated TO-220(MP-45F) package (Isolated TO-220)
Absolute Maximum Ratings (Ta = 25°C)
1. Drain to source voltage: VDSS = 500 V
2. Gate to source voltage: VGSS = ± 30 V
3. Drain current: ID = 10 A
4. Total Power Dissipation: Pd = 2 W