This part is a kind of semiconductor called SSH7N90A.

Function of this product has N-Channel Power Mosfets.

Manufacturers : Fairchild

Image and pinout :

Some of the text within the PDF file :

N-CHANNEL POWER MOSFET SSH7N90A FEATURES BVDSS = 900V • • • • • • • Avalanche Rugged Technology Rugged Gate Oxide Technology Lower Input Capacitance Improved Gate Charge Extended Safe Operating Area Lower Leakage Current: 25µA (Max.) @ VDS = 900V Lower RDS(ON): 1.247Ω (Typ.) 1 2 3 RDS(ON) = 1.8Ω ID = 7A TO-3P ABSOLUTE MAXIMUM RATINGS Symbol VDSS ID IDM VGS EAS IAR EAR dv/dt PD TJ, TSTG TL Characteristics Drain-to-Source Voltage Continuous Drain Current (TC = 25°C) Continuous Drain Current (TC = 100°C) Drain Current-Pulsed Gate-to-Source Voltage Single Pulsed Avalanche Energy Avalanche Current Repetitive Avalanche Energy Peak Diode Recovery dv/dt Total Power Dissipation (TC = 25°C) Linear Derating Factor Operating Junction and Storage Temperature Range Maximum Lea [ ... ]

SSH7N90A PDF Datasheet Download