The BC847B S is a NPN transistor manufactured by ON Semiconductor (formerly Fairchild Semiconductor). It is commonly used in general-purpose low-power amplification and switching applications. This component belongs to the BC847 series of transistors and comes in various package options.
Pinout and Package Details
The BC847BS typically comes in a TO-92 package. The TO-92 package is a three-pin package, where each pin corresponds to a specific function. Here's the detailed breakdown of its pin functions:
Pin Number Pin Name Pin Function Description 1 Collector (C) Collector pin The current flows into the collector. The voltage at this pin is typically positive. 2 Base (B) Base pin The base controls the transistor’s operation. The current flows from base to emitter to turn the transistor on. 3 Emitter (E) Emitter pin The current flows out of the emitter to ground or a negative voltage. The emitter is typically at the lowest potential.This is a 3-pin NPN transistor, so the TO-92 package will always have only 3 pins.
General Functionality of BC847BS
Base (B): Controls the transistor. A small current or voltage at the base allows a larger current to flow between the collector and emitter. Collector (C): It’s the terminal through which the current flows into the transistor, from the power supply or load. Emitter (E): Current exits through this terminal.FAQ - Frequently Asked Questions for BC847BS
Q: What is the BC847BS used for? A: The BC847BS is a general-purpose NPN transistor used for switching and amplification in electronic circuits.
Q: What is the maximum voltage the BC847BS can handle? A: The maximum collector-emitter voltage (Vce) is 45V for the BC847BS.
Q: What is the maximum current the BC847BS can handle? A: The maximum collector current (Ic) is 100mA.
Q: What is the power dissipation of the BC847BS? A: The BC847BS can dissipate a maximum of 500mW of power.
Q: What type of transistor is the BC847BS? A: The BC847BS is an NPN transistor.
Q: What is the gain (hFE) of the BC847BS? A: The BC847BS typically has a current gain (hFE) ranging from 110 to 800.
Q: Can the BC847BS be used for high-frequency applications? A: While it is not specifically a high-frequency transistor, it can be used for general-purpose switching and low-frequency amplification applications.
Q: What is the maximum base-emitter voltage for the BC847BS? A: The maximum base-emitter voltage (Vbe) is 5V.
Q: How can I calculate the base current for the BC847BS? A: Use the formula (Ib = \frac{Ic}{h{FE}}) where (Ib) is the base current and (I_c) is the collector current.
Q: What is the temperature range for the BC847BS? A: The operating temperature range for the BC847BS is -55°C to +150°C.
Q: Can the BC847BS be used as a switch? A: Yes, the BC847BS can be used as a low-power switch in a circuit.
Q: What is the maximum collector-emitter voltage for the BC847BS? A: The maximum collector-emitter voltage (Vce) is 45V.
Q: What is the base resistor needed for the BC847BS? A: The base resistor depends on the desired base current, but typically you can calculate it using Ohm’s law, considering the voltage at the base and the base current.
Q: Can the BC847BS be used for audio amplification? A: Yes, the BC847BS is often used in low-power audio amplification circuits.
Q: How does the BC847BS handle thermal dissipation? A: It has a small package that can dissipate up to 500mW, and should be used with appropriate heat management in more demanding applications.
Q: How should I connect the BC847BS in a circuit? A: The emitter is typically grounded, the base is driven by a signal, and the collector is connected to a load.
Q: Is the BC847BS compatible with logic circuits? A: Yes, the BC847BS is commonly used in logic circuits for switching operations.
Q: How do I ensure the BC847BS stays within its safe operating limits? A: Ensure that the collector-emitter voltage, base-emitter voltage, and collector current do not exceed the maximum ratings.
Q: What is the typical application of the BC847BS in consumer electronics? A: It is often used in low-power amplification circuits, audio systems, or as a switching component in simple electronic devices.
Q: Can the BC847BS be used in automotive applications? A: The BC847BS is rated for -55°C to +150°C, so it can be used in automotive applications where temperature extremes are a concern.
Pin Function Details Table
Pin Number Pin Name Pin Function Description 1 Collector (C) The terminal where the current flows from the load or power source into the transistor. The voltage at this pin is typically positive in NPN configuration. 2 Base (B) The control pin for the transistor. A small input current at this pin allows a larger current to flow from collector to emitter. 3 Emitter (E) The terminal where current exits the transistor. The emitter is typically at the lowest potential in the circuit.The BC847BS is widely used for its general-purpose functionality and is commonly seen in discrete components and small-signal applications. This table covers all 3 pins, detailing their functions and roles in typical NPN transistor operations.
