S8550 PNP Transistor 25V 625mW 500mA TO-92

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Pinout S8550 Pinout Configuration Pin Number Pin Name Description 1 Emitter Current Drains out through emitter, normally connected to ground 2 Base Controls the biasing of transistor, Used to turn ON or OFF the transistor 3 Collector Current flows in through collector, normally connected to load Features Low Voltage, High Current PNP Transistor Continuous Collector current (IC) is 500mA Collector-Emitter voltage (VCEO) is -25 V Collector-Base voltage (VCB0) is -40V Emitter Base Voltage (VBE0) is -5V Current Gain (hFE), 85 to 300 Commonly used as Class B Push-pull transistors Available in To-92 Package Note: Complete Technical Details can be found at the S8550 transistor datasheet given at the end of this article. S8550 in Push-Pull Configuration As mentioned in the features the S8550 transistor is commonly used in push pull configuration with Class B amplifier. So let us discuss how that is done. A push pull amplifier, commonly known as Class B amplifier is type of multistage amplifier commonly used for audio amplification of loudspeakers. It is very simple to construct and requires two identical complimentary transistors operate. By complimentary it means that we need a NPN transistor and its equivalent PNP transistor. Like here the NPN transistor will be S8050 and its equivalent PNP transistor will be S8550. A simple circuit diagram of the Class B amplifier with the using the S8050 is shown below. Applications Audio Amplification Circuits Class B Amplifiers Push pull Transistors Circuits where high gain is required Low signal applications Component Datasheet S8550 Datasheet