This part is a kind of semiconductor called P3055LDG.

Function of this product has N-Channel Enhancement Mode MOSFET.

Manufacturers : UNIKC

Image and pinout :

Some of the text within the PDF file :

P3055LDG N-Channel Logic Level Enhancement Mode MOSFET PRODUCT SUMMARY V(BR)DSS RDS(ON) 25V 90mΩ @VGS = 10V ID 12A TO-252 ABSOLUTE MAXIMUM RATINGS (TC = 25 °C Unless Otherwise Noted) PARAMETERS/TEST CONDITIONS SYMBOL LIMITS Gate-Source Voltage VGS ±20 Continuous Drain Current Pulsed Drain Current1 TC= 25 °C TC= 100 °C ID IDM 12 8 45 Avalanche Energy L=0.1mH EAS 60 Power Dissipation TC= 25 °C TC= 100°C PD 48 20 Operating Junction & Storage Temperature Range Lead Temperature (1/16” from case for 10 sec.) Tj, Tstg TL -55 to 150 275 UNITS V A mJ W °C THERMAL RESISTANCE RATINGS THERMAL RESISTANCE Junction-to-Case Junction-to-Ambient Case-to-Heatsink 1Pulse width limited by maximum junction temperature. SYMBOL RqJC RqJA RqCS TYPICAL 1 MAXIMUM 3 75 UNITS [ ... ]

P3055LDG PDF Datasheet Download