The diode 4148 is included in the diode. its physical form same as zener diodes, only if the zener diode in writing that there his body determine the size of the diode
Diodes are electronic components that are often used in power circuits supplied, because the benefits of the diode itself is to change the AC current into DC current or by word
others can be vented alternating current into direct current. Diode ampere size, so the power of the diode depends on the size of ampere diode itself.