With respect to the other functionalities, the signal diodes usually have a small current carrying capability and power dissipation. For applications at high frequencies, the performance of the small signal diode is very effective. To indicate the cathode terminal, one edge is marked with black or red color. One of the popular diodes of this type is the 1N4148.Īppearance wise, signal diodes are very small when compared with power diodes. To protect the diode from contamination it is enveloped with a glass so it is also named as Glass Passivated Diode. It is a small device with disproportional characteristics whose applications are mainly involved at high frequency and very low current applications such as radios and televisions etc.
Let us now briefly see about few common types of diodes. There are many Different Types of diodes and some of them are listed below. Since diodes allow current to flow only in one direction and blocks current flow in the other direction, diodes are used in reverse polarity protector and transient protector applications. One of the main application of Diodes is Rectification i.e., to convert AC to DC. Usually, in Silicon Diodes, the dark band on one end of the diode indicates the Cathode terminal and the other terminal is anode. For Silicon Diodes, the forward voltage is 0.7V and for Germanium diodes, it is 0.3V.
Transient Voltage Suppression Diodeĭiodes are two-terminal electronic devices / components that functions as a one-way switch i.e., they allow current to flow only in one direction.
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