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The BC548 is a part of a family of NPN and PNP epitaxial silicon transistors that originated with the metal-cased BC108 family of transistors.The BC548 is the modern plastic-packaged BC108; [6] the BC548 article at the Radiomuseum website [7] describes the BC548 as a successor to the BC238 and differing from the BC108 in only the shape of the package.
The bipolar junction transistor, the first type of transistor to be mass-produced, is a combination of two junction diodes and is formed of either a thin layer of p-type semiconductor sandwiched between two n-type semiconductors (an n–p–n transistor), or a thin layer of n-type semiconductor sandwiched between two p-type semiconductors (a p ...
BC108 family transistors from various manufacturers (ITT, CEMI, SGS-ATES, Siemens)The BC107, BC108 and BC109 are general-purpose low power silicon NPN bipolar junction transistors found very often in equipment and electronics books/articles from Europe, Australia [1] and many other countries from the 1960s.
All semiconductor junction devices exhibit the effect, so they can be used as varicaps, but their characteristics will not be controlled and can vary widely between batches. Popular makeshift varicaps include LEDs, [ 5 ] 1N400X series rectifier diodes, [ 6 ] Schottky rectifiers and various transistors used with their collector-base junctions ...
Darlington Transistor (NPN-type) In electronics, a Darlington configuration (commonly called as a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the first transistor is amplified further by the second one. [1]
Wikipedia is an encyclopedia for a general readership, not a place to lay out technical info that is better held in the actual datasheet. Think about it: the ultimate arbiter for the HfE of a transistor is the manufacturer, not Wikipedia. If you are going into production you will look to the datasheet for the VCE breakdown voltage, not Wikipedia.