The BC846B is a NPN transistor made by Fairchild Semiconductor (now part of ON Semiconductor). It is a general-purpose small-signal transistor used for amplification and switching applications.
Pinout and Pin Function Specification:
The BC846B comes in a TO-92 package, which is a standard 3-pin package for small signal transistors. The TO-92 package consists of the following 3 pins:
Pin Number Pin Function 1 Collector (C) 2 Base (B) 3 Emitter (E)Detailed Pin Function:
Pin 1 (Collector, C): The collector pin is the region where the output current flows from the transistor to the load. In an NPN transistor, this pin is connected to the positive voltage or the collector load. The current flows from the collector to the emitter when the transistor is in active mode. Pin 2 (Base, B): The base pin is the control pin that regulates the flow of current between the collector and emitter. A small current applied to the base pin turns the transistor "on" and allows a larger current to flow between the collector and emitter. The base-emitter junction behaves like a diode, so it requires a forward voltage of about 0.7V to turn the transistor on. Pin 3 (Emitter, E): The emitter pin is the region where the current flows out of the transistor. In an NPN transistor, the emitter is typically connected to the ground or negative side of the circuit. The current flows from the emitter to the collector when the transistor is turned on.BC846B Pinout: TO-92 Package (3 Pins)
________ | | | TO-92 | --> Transistor package |________| | | | Pin1 Pin2 Pin3Electrical Specifications:
Collector-Emitter Voltage (Vceo): 65V Collector-Base Voltage (Vcbo): 80V Emitter-Base Voltage (Vebo): 5V Collector Current (Ic): 100mA Power Dissipation (Ptot): 500mW DC Current Gain (hFE): 110 to 800 (depending on current)20 FAQ (Frequently Asked Questions) for BC846B Transistor
1. Q: What is the BC846B transistor?A: The BC846B is a general-purpose NPN transistor used for small signal amplification and switching applications. It is part of the BC846 series.
2. Q: How many pins does the BC846B have?A: The BC846B has 3 pins: Collector (C), Base (B), and Emitter (E).
3. Q: What type of package does the BC846B come in?A: The BC846B comes in a TO-92 package.
4. Q: What is the maximum collector-emitter voltage (Vceo) for BC846B?A: The maximum collector-emitter voltage (Vceo) for the BC846B is 65V.
5. Q: What is the maximum current rating for the BC846B transistor?A: The maximum collector current (Ic) for the BC846B is 100mA.
6. Q: How does the BC846B work?A: The BC846B works as an NPN transistor where current flows from the collector to the emitter when a small current is applied to the base.
7. Q: What is the base-emitter voltage required to turn on the BC846B?A: The base-emitter voltage required to turn on the BC846B is approximately 0.7V.
8. Q: What are the common applications of the BC846B transistor?A: The BC846B is commonly used in signal amplification and switching applications such as in amplifiers, oscillators, and light drivers.
9. Q: What is the typical gain (hFE) for the BC846B?A: The typical current gain (hFE) for the BC846B ranges from 110 to 800, depending on the collector current.
10. Q: How do you bias a BC846B transistor?A: Biasing a BC846B transistor involves setting the base current such that the transistor operates in the active region, allowing the desired current to flow from the collector to the emitter.
11. Q: What is the maximum power dissipation for the BC846B?A: The maximum power dissipation (Ptot) for the BC846B is 500mW.
12. Q: Can the BC846B be used for switching?A: Yes, the BC846B can be used for switching applications when the base current is sufficiently high to turn it on fully.
13. Q: What is the typical frequency response of the BC846B?A: The BC846B transistor is suitable for high-frequency applications, typically with a transition frequency (ft) around 250MHz.
14. Q: Can the BC846B be used in high power applications?A: No, the BC846B is designed for low to medium power applications, with a maximum power dissipation of 500mW.
15. Q: How do I determine the pinout of the BC846B transistor?A: The BC846B transistor has 3 pins in a TO-92 package, which are: Pin 1 = Collector (C), Pin 2 = Base (B), and Pin 3 = Emitter (E).
16. Q: What is the maximum collector-base voltage for the BC846B?A: The maximum collector-base voltage (Vcbo) for the BC846B is 80V.
17. Q: What happens if the collector current exceeds the maximum rating for the BC846B?A: Exceeding the maximum collector current (100mA) could damage the transistor and lead to overheating or failure.
18. Q: Can the BC846B transistor be used for audio applications?A: Yes, the BC846B is often used in low-noise audio amplifier circuits.
19. Q: What are the thermal characteristics of the BC846B?A: The BC846B has a junction-to-ambient thermal resistance of approximately 250°C/W.
20. Q: How do I choose a suitable replacement for the BC846B?A: When choosing a replacement for the BC846B, ensure that the new transistor has similar voltage, current, and power ratings, as well as matching package and pinout configuration.
This should provide you with a comprehensive explanation and answers for the BC846B transistor. If you need further details or a specific section expanded, feel free to ask!
