This post explains for the MOSFET.
The Part Number is 40T03GH, AP40T03GH.
The function of this semiconductor is 30V, N-Channel MOSFET.
The package is TO-252, TO-251 Type
Manufacturer: Advanced Power Electronics
Preview images :
Description
40T03GH is 30V, 28A, MOSFET.
Advanced Power MOSFETs from APEC provide the designer with the best combination of fast switching, ruggedized device design, low on-resistance and cost-effectiveness. The TO-252 package is widely preferred for all commercial-industrial surface mount applications and suited for low voltage applications such as DC/DC converters. The through-hole version (AP40T03GJ) are available for low-profile applications.
Features
1. Simple Drive Requirement
2. Low Gate Charge
3. Fast Switching
Absolute Maximum Ratings (Ta = 25°C)
1. Drain to source voltage: VDSS = 30 V
2. Gate to source voltage: VGSS = ± 25 V
3. Drain current: ID = 28 A
4. Total Power Dissipation: Pd = 31.25 W
5. Storage Temperature : Tch = -55 to +150 °C
6. Operating Junction temperature : Tstg = -55 to +150 °C