This is one of the types of MOSFETs and is a kind of transistor.
art Number : K4005-01MR, 2SK4005-01MR, 2SK4005, MS5F5984
Function: Power MOSFET For Switching, Vds=900V, Id=6A
Package: TO-220F Type
Manufacturer: Fuji Electric Device Technologoy
This is 900V, 6A, N-Channel enhancement mode Power MOSFET.
Absolute Maximum Ratings ( at Tc=25°C )
1. Drain-Source Voltage, Continuous Drain Current : Vds = Vdsx = 900V
2. Pulsed Drain Current : Id = 6.0A
3. Repetitive and Non-repetitive Maximum Avalanche Current : Iar = 6.0A
4. Non-Repetitive Maximum Avalanche Energy : Eas = 487 mJ
5. Repetitive Maximum Avalanche Energy : Ear = 7.0 mJ
6. Maximum Power Dissipation: Pd = 70 W