![]() The Current flows in through the collector terminal BC557 Transistor Pin Diagram/Pinout/Pin Configuration Pin No The pin configuration/ Pin diagram and functionality is discussed below. The BC557 transistor has three terminals/Pins called collector, base, and emitter, these are commonly used for external connection with the electronic circuit. BC557 Transistor Pin Diagram/Pin Configuration/Pinout we can drive loads of a maximum of 100mA through the transistor. The maximum collector current of this transistor is 100mA i.e. Another good feature of this transistor is the maximum collector dissipation is 500 milliwatts. ![]() The HFE ratings are determined by the last letter after the transistor number, for example, for the BC557A transistor hFE ratings are 110-220, for the BC557B transistor it is 200-450 hFE and for the BC557C transistor it is 420-800 hFE. The BC557 has an hFE rating range from 125 to 800 which makes it an ideal transistor to use as a small signal amplifier in electronic circuits. This is a general-purpose transistor available in a tiny package like TO-92. one N-doped layer stands between the two P-doped layers. It is a bipolar junction transistor (BJT) that falls under the family of PNP transistors i.e. The BC557 is a famous three-terminal semiconductor device used to switch or amplify electrical power & electronic signals in electronic circuits. ![]() BC557 Transistor Pin Diagram/Pin Configuration/Pinout.
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