This post explains for the MOSFET.
The Part Number is 4957AGM, AP4957AGM.
The function of this semiconductor is -30V, -7.4A, P-Channel Power MOSFET.
The package is SO-8 pin Type
Manufacturer: Advanced Power Electronics
Preview images :
This is P-CHANNEL ENHANCEMENT MODE POWER MOSFET.
Advanced Power MOSFETs from APEC provide the designer with the best combination of fast switching, ruggedized device design, ultra low on-resistance and cost-effectiveness.
1. Low On-Resistance
2. Simple Drive Requirement
3. Dual P MOSFET Package
Absolute Maximum Ratings (Ta = 25°C)
1. Drain to source voltage: VDSS = – 30 V
2. Gate to source voltage: VGSS = ± 20 V
3. Drain current: ID = – 7.4 A
4. Total Power Dissipation: Pd = 2 W
5. Channel temperature: Tch = 150 °C
6. Storage temperature: Tstg = -55 to +150 °C