Small signal transistors come in both PNP & NPN forms which are used for amplifying low-level signals and also they can be used as a switch. These transistors mainly depend on the contact between two different kinds of semiconductors to amplify or switch electronic signals & power. The typical hFE values for these transistors range from 10 to 500 with the highest IC ratings ranging from 80 to 600mA. The maximum operating frequencies of these transistors range from 1 to 300 MHz. These … [Read more...]

The KST42 transistor was invented by an American semiconductor company namely “Fairchild Semiconductor International, Inc., located in San Jose, California. This company manufactures different transistors and integrated circuits. So, the KST42 transistor is a high-voltage transistor and it is ideal for lighting, battery charger, and power supply applications. This article gives an overview of the KST42 transistor, pin configuration, specifications, and applications. What is KST42 T … [Read more...]

The transistor like PNP operates almost similarly to NPN but the current directions & voltage polarities will be reversed. The flow of current in NPN is from the collector terminal to the emitter whereas in PNP, it is from the emitter terminal to the collector. So, a PNP transistor is generally a type of transistor where n-type material can be doped using two p-type materials. A PNP transistor is an electronic component that is controlled simply through the current supply. So the small … [Read more...]