This post explains for the FET.
The Part Number is 55N03LTA.
The function of this semiconductor is Logic Level FET.
The package is SOT-78, SOT-404, SOT-428 Type.
Manufacturers : Philips
Preview images :
1 page
Description :
N-channel logic level field-effect power transistor in a plastic package using TrenchMOS technology.
Product availability :
1. PHP55N03LTA in a SOT78 (TO-220AB)
2. PHB55N03LTA in a SOT404 (D2-PAK)
3. PHD55N03LTA in a SOT428 (D-PAK).
Features :
1. Low on-state resistance
2. Fast switching.
Absolute Maximum Ratings (Ta = 25°C)
1. Drain to source voltage : VDSS = 25 V
3. Drain current : ID = 55 A
4. Total Power Dissipation : Pd = 85 W
5. Channel temperature : Tch = 175 °C
6. Storage temperature : Tstg = -55 to +175 °C
Applications
1. Computer motherboard high frequency DC to DC converters.
[…]
Other data sheets within the file : PHP55N03LTA, PHB55N03LTA, PHD55N03LTA