P-N Junction Diode:
Diodes allow electricity to flow in only one direction. It is the electrical version of valves.
The 1N4148 are high-speed switching diodes fabricated in planar technology, and encapsulated in hermetically sealed leaded glass SOD27 (DO-35) packages.
Vrpm=100V (Max. repetitive reverse voltage)
Io=200mA (Avg. rectified forward current)
If=300mA (DC forward current)
Pd=500mW (Power dissipation)
Tpr<4ns (Reverse recovery time)
The 1N4148 is a signal diode, good for low voltage and low current applications.