Use Case of TIP31C and TIP32C

Today, in this blog I'm going to give you a overview of Use Case of TIP31C and TIP32C. This blog is the continuous blog of the series of transistor so if you wish to read about any other transistor then you may click HERE

TIP32C - PNP Power Transistor TIP31C – NPN Power Transistor
TIP32C - PNP Power Transistor, TIP32C, TIP32C pinout , TIP32C symbol, BJT, BJT transistor, Power transistor, Power BJT
TIP31C - PNP Power Transistor, TIP31C, TIP31C pinout , TIP31C symbol, BJT, BJT transistor, Power transistor, Power BJT
The TIP32C is a silicon PNP power transistor(BJT) in the TO-220 plastic package. Since it has a high collector current of about 3A it can be used for Power switching or large signal amplification. The transistor is mainly known for its high amplification capacity. The TIP31 is a typical NPN transistor(BJT) in the TO-220 plastic package. The central unit which is (base) is thin and the other external emitter and collector are more doped compared to the base. It has a high collector current of about 3A.





TIP32C - PNP Power Transistor TIP31C – NPN Power Transistor


Parameter Value
collector-base voltage (IE = 0) -100V
Collector-emitter voltage (IB = 0) -100V  
Emitte-base voltage (IC = 0) -5V
Collector current -3A
Collector peak current  -5A
Total power dissipation 40W
Base current -1A
base-emitter voltage  -1.8V
Collector-emitter saturation voltage  -1.2V
Emitter cut-off current (IC = 0) -1 mA
DC current gain 50

Parameter Value
collector-base voltage (IE = 0) 100V
Collector-emitter voltage (IB = 0) 100V  
Emitte-base voltage (IC = 0) 5V
Collector current 3A
Collector peak current  5A
Total power dissipation 40W
Base current 1A
base-emitter voltage  1.8V
Collector-emitter saturation voltage  1.2V
Emitter cut-off current (IC = 0) 1 mA
DC current gain 50





TIP31C as a switch circuit, TIP31C, Power transistor circuit

Simple switches are one of the most basic applications for transistors in electronic circuits.  Simply, when a voltage is supplied to the base, a transistor conducts current across the collector-emitter channel. When there is no base voltage present, the switch is turned off. The switch is turned on when the base voltage is present.

  • LED: This is an 8 mm red LED. 

  • R1(470): This 470 resistor restricts the current flowing through the LED, preventing it from burning out. Ohm's law may be used to calculate the amount of current that the resistor will allow to flow.

  • TIP31C: This is a basic NPN transistor. The collector is linked to R1 and the LED, while the emitter is connected to the ground. When you switch on the transistor, the current passes through the collector and emitter, which lights the LED. When the transistor is switched off, it functions as an insulator, and the LED does not glow.

  • S1: This switch determines whether the current may travel to the base. Closing this switch activates the transistor, causing current to flow through the LED. As a result, closing this switch activates the LED even though it is not directly connected to the LED circuit.

TIP31C as a Amplifier circuit, TIP31C, Power transistor circuit

A transistor functions as an amplifier by amplifying a weak signal. When a DC bias voltage is provided to the emitter-base junction, it remains forward biased. This forward bias is maintained irrespective of the signal's polarity.

Because of the low resistance in the input circuit, every minor change in the input signal results in a large change in the output. The input signal's emitter current goes to the collector current, which then flows through the load resistor RL, causing a high voltage drop across it. As a result, a small input value results in a big output voltage, indicating that the transistor functions as an amplifier.


A transistor may also be used to drive and regulate the speed of a DC motor in a unidirectional manner, by switching the transistor at regular intervals of time, as illustrated in the picture. We can turn the motor on and off repeatedly by switching the transistor in the cutoff and saturation zones.



TIP32C as a switch circuit, TIP32C, Power transistor circuit, PNP
TIP32C as a Amplifier circuit, TIP32C, Power transistor circuit
TIP32C transistor operates in the same way as TIP31C transistor in terms of switching, but the current flows from the base. The base terminal of a PNP transistor is always negatively biased with respect to the emitter.

In this connection, the load is connected to the transistor switching output with a reference point. When the transistor is activated, current travels from the source to the transistor, then to the load, and ultimately to the ground.
Amplification is the process of transforming a weak signal into a useful signal. Amplification is an important step in many applications such as wirelessly transmitted signals, wirelessly received signals, MP3 players, mobile phones, and so on. At various configurations, the transistor may increase power, voltage, and current. TIP32C is used in the amplification circuit shown above.



TIP32C, TIP32C in hand sanitizer circuit, TIP32C hand sanitizer, Hand sanitizer circuit, hand sanitizer, tip32c and ir sensor


 A transistor TIP32C is a device used to amplify and switch the electrical signals in the Automatic Hand sanitizer.


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