This transistor can amplify power, voltage, and current at different configurations.ĭifferent configurations are used in amplifier circuits, Some of them are The transistor is operated in the Active Region when we will use it as an Amplifier. This way current is flowing through the circuit: Power Supply → Resistor → LED → Collector-Emitter → Ground BC547 Transistor as switch circuit diagram LED ON BC547 Transistor as An Amplifier Now the transistor is in Forward Bias states, so the current starts flowing through the collector & emitter. When we will press the switch, then it is in close condition, so the voltage is applied to the base terminal.
The voltage between the collector and the base (V CB), is negative at the base and positive at the collector terminal and the voltage between the collector and the emitter (V CE), is negative at the emitter and positive at the collector terminal.īC547 Transistor as switch circuit diagram LED OFF The voltage between the base terminal and the emitter terminal (V BE), is negative at the emitter terminal and positive at the base terminal for its NPN construction. When the input voltage is applied at the base terminal, then some amount of current starts to flow from the base terminal to the emitter terminal and controls the current at the collector terminal. In reverse bias mode, this transistor doesn’t allow the flow of current through the collector & emitter.
When we will do not apply any voltage (or apply negative voltage) at the base terminal of this transistor, then it starts working as Reverse Bias. In forward bias mode, this transistor allows the flow of current through the collector & emitter.
So, when we will apply positive voltage at the base terminal of this transistor, then it starts working as Forward Bias. This transistor has two working states, one is Forward Bias and another one is Reverse Bias.īC547 is an NPN transistor. The current supplies out through the emitter terminal. This pin controls the transistor biasing. If accidently placed wrong in a circuit than check its performance again because placing wrong pins sometimes burns the internal circuitry of the transistor or make it weak.The flow of current will be through the collector terminal. Always confirm the collector emitter and base pins before placing in circuit. Do not use or store it in temperature above +150 centigrade and below -65 centigrade. Always use a suitable base resistor to provide required current for saturation. The max transition frequency of the transistor is 300MHz so it will also perform well in RF circuits under 300MHz frequency.įor long run in a circuit it is important to not increase load more than 100mA on it, and do not exceed the voltage across this transistor to 45V DC. The BC547 is a widely used transistor and it can be used in any general purpose application, it can also be used as a substitute and replacement to many transistors, therefore it can be used in variety of electronic circuits for example switch small load on very low input voltage and current and also in amplification of small audio and other signals. The typical saturation voltage is only 90 millivolts which is also a good sign to use it as a switch. The transistor is having very good DC current gain and low noise capabilities due to which it is ideal to use in signal amplification stages. It comes in TO-92 packaging and the maximum output current this transistor can handle is 100mA. Besides these uses it can also be used in commercial circuits.
Max Storage & Operating temperature Should Be: -65 to +150 CentigradeĢN2222, 2N3904, 2N4401, BC337 (Pin configuration of some transistors are different from BC547, check pin configuration before replacing in a circuit)īC547 Transistor Explained / Description:īC547 is a general purpose BJT NPN transistor mostly used in electronics hobbyists and educational electronics projects.Minimum & Maximum DC Current Gain (h FE): 110 – 800.Max Collector Dissipation (Pc): 500 miliWatt.Max Collector-Emitter Voltage (V CE): 45V.Advertisements Features / technical specifications:
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