Fairchild 5L0380R Power Switch IC TO-220 Package GPRS Module It has a break-down voltage

It has a break-down voltage and low drive current

gives the lowest Rds(on) per area

Brown for these 47E resistors

2SC3998 Transistor is used in Applications where high-speed switching and higher breakdown voltage are required

The TLP626-2 also offers two isolated channels in an eight lead plastic DIP

Fairchild 5L0380R Power Switch IC TO-220 Package GPRS Module It has a break-down voltageThe Fairchild 5L0380R Power Switch IC consists of a high voltage power SenseFET and a current mode PWM IC. Included PWM controller integrates the fixed frequency oscillator, the under voltage lock out, the leading edge blanking, the optimized gate turn on turn off driver, the thermal shutdown protection, the overvoltage protection, and the temperature compensated precision current sources for the loop compensation and the fault protection circuitry.