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Where to use BC Transistor The BC is a low signal NPN which is known for its low noise operations making it famously used in signal processing circuits and television receivers. The transistor is still available in market due to its legacy but you will find better modern transistors as replacement for BC Brief Description on BC Transistor BC is a NPN transistor hence the collector and emitter will be left open Reverse biased when the base pin is held at ground and will be closed Forward biased when a signal is provided to base pin.
BC has a gain value hfe of 50; this value determines the amplification capacity of the transistor. The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this transistor. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. This stage is called Saturation Region. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region.
Amplifier modules like Audio amplifiers, signal Amplifier etc.. Darlington pair 2D model of the component If you are designing a PCD or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions. Component Datasheet.
SGS Thomson Microelectronics
BC107 Datasheet, Equivalent, Cross Reference Search