It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. The maximum collector current of the 2N2222 is 800mA, whereas the bc547's is 100mA.īoth the 2N2222 and the BC547 have the same power dissipation (500mw), the 2N2222 has a DC gain of 75 to 300HFe and the BC547 has a DC gain of 110 to 800HFe, and the 2N2222 has a thermal resistance of 146k/w and the BC547 has a thermal resistance of 83.3 C/w.īecause the transition frequency of 2N2222 is 250MHz and that of BC547 is 300MHz, the noise figure on 2N2222 is 4db and on BC547 is 10db.2N2222 is a semiconductor device used to amplify or switch electronic signals and electrical power. The voltage between the emitter and the base is 5 volts in 2N2222 and 6 volts in BC547. The collector to base voltage at 2N2222 is 60 volts, whereas it is 50 volts at BC547, and the collector to emitter voltage is 30 volts at 2N2222 vs 45 volts at BC547. The 2N2222 has an emitter, base, and collector pinout, whereas the BC547 has a collector, base, and emitter pinout. The BC547 transistor came in a to-92 package, but 2N2222 transistors, such as the PN2222 and KN2222, also came in to-92 packages. The 2N transistors were packaged in a to-18 package, which means they were enclosed with metal. The 2N2222 transistor is more powerful than the BC547. The BC series, such as BC549 and BC639, are the finest recommendations for the BC547 transistor equivalent, followed by the 2N2222 transistor.īC636 replaces BC547, 2N2369, 2N3055, 2N3904, 2N3906, and 2SC5200 in the PNP.ĢN3904, BC547, BC548, and 2N3906 are 2N2222 comparable transistors.Įach of the 2N2222 equivalent transistors described here is an NPN bipolar transistor, with the majority of them being identical. Package TO-92 TO-18 BC547 vs 2N2222 Equivalents When the switch is closed, the transistor starts working, and the resistor value regulates the LED ON/OFF interval. In the circuit, the 2N2222 transistor is shown as a switch, with an input resistor driving it and a second resistor driving the LED. You can also use a timer to control when the LED turns on and off. The schematic depicts the basic circuit of the BC547 as a switch, which contains two resistors for driving LEDs and a transistor bias terminal.Ĭurrent flows across the circuit when the switch is closed, and the transistor serves the function of a switch. This one has a higher gain due to the transistor architecture. The best voltage amplifier circuit that uses the NPN 2N2222 transistor is the common emitter arrangement. The diagram depicts an amplifier circuit using a 2N2222 transistor. The input resistor and capacitor will be used as bypass components, with the resistor acting as a biasing agent for the BC547 transistor.Īs a result, an audio signal received at the input is amplified and sent to the output speaker by the transistor. The diagram depicts a basic amplifier circuit that uses BC547 and only has four components.
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