This part is a kind of semiconductor called BUZ100S.

Function of this product has SIPMOS Power Transistor (N channel Enhancement mode Avalanche-rated dv/dt rated).

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

BUZ 100 S SPP77N05 SIPMOS ® Power Transistor • N channel • Enhancement mode • Avalanche-rated • dv /dt rated • 175°C operating temperature • also in SMD available Pin 1 Pin 2 Pin 3 G D S Type VDS 55 V ID 77 A RDS(on) 0.015 Ω Package Ordering Code BUZ 100 S TO-220 AB Q67040-S4001-A2 Maximum Ratings Parameter Symbol Values Unit Continuous drain current TC = 25 °C TC = 100 °C ID A 77 55 Pulsed drain current TC = 25 °C IDpuls 308 E AS Avalanche energy, single pulse ID = 77 A, V DD = 25 V, RGS = 25 Ω L = 128 µH, Tj = 25 °C mJ 380 IAR E AR Avalanche current,limited by Tjmax Avalanche energy,periodic limited by Tjmax Reverse diode dv/dt IS = 77 A, VDS = 40 V, diF/dt = 200 A/µs Tjmax = 175 °C 77 17 A mJ kV/µs dv/dt 6 V GS P tot Gate source vo [ ... ]

BUZ100S PDF Datasheet Download