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TIP31C NPN Power Transistor: Pinout, Equivalent, Datasheet [Video]

Author: Mia Date: 20 Apr 2021  1562

tip31c transistor

TIP31C is a bipolar power transistor which designed for use in general purpose amplifier and switching applications. This blog mainly introduce pinout, equivalents, applications and other detailed information about TIP31C. Down below is a video shows how to use TIP31C to make an audio amplifier.

 

This blog will introduce TIP31C systematically from its pinout, features to its application, equivalents, also including where and how to use this component and so much more.

Using TIP31C Making Powerful Audio Amplifier


Catalog

TIP31C Pin Configuration and Functions

TIP31C Features

TIP31C Applications

TIP31C Package

Where to Use TIP31C

How to Use TIP31C

How to Safely Long Run TIP31C in a Circuit

TIP31C Functional Equivalents

TIP31C Popularity by Region

TIP31C Market Price Analysis

TIP31C Manufacturer

Component Datasheet

Ordering & Quantity


TIP31C Pin Configuration and Functions

TIP31C Pinout

 

Like any other transistor it has three pins namely EMITTER, BASE and COLLECTOR. The pin configuration of TIP31C is given below.

 

Pin Number Pin Name Description
1 Base (B) Normally used as TRIGGER to turn ON the TRANSISTOR.
2 Collector (C) Normally connected to LOAD
3 Emitter (E) Normally connected to GROUND

TIP31C Features

  • New enhanced series
  • High switching speed
  • hFE improved linearity
  • hFE Grouping

TIP31C Applications

  • DC motor speed control
  • Lighting systems
  • PWM applications
  • Relay drivers
  • Switch mode power supply
  • Audio Amplifiers
  • Signal Amplifiers

TIP31C Package

TIP31C Package


Where to Use TIP31C

TIP31C can be used in the situations below:

 

Situation 1: When you want a simple switching device for medium power loads. TIP31C is one of the basic TRANSISTORS out there which are easily available and cheap. With electrical characteristics suiting many applications it is fairly popular. So the component is best suited when choosing a random switching device.

 

Situation 2: When you want amplify a signal. The amplifying factor of TIP31C is fairly good and the important thing is gain is almost linear. So these characteristics make TIP31C one of best contender for amplifying applications.

 

Situation 3: TIP31C can be controlled by microcontroller pulses because of its gain and high speed response. So it can be used in high speed switching applications.

 


How to Use TIP31C

TIP31C can be used like any other power transistor. Here we are going to use TIP31C in common emitter configuration to understand its working.

 

In the circuit above we are using TIP31C as a simple switching device. As show in figure we are using a small DC MOTOR as the LOAD. The TRIGGER for turning ON the TRANSISTOR is provided by CONTROL UNIT (NOT MICROCONTROLLER as MICROCONTROLLER cannot deliver 300mA). The control unit provides +5V pulses to base of TRANSISTOR. The CONTROL UNIT GROUND must be connected to TRANSISTOR EMITTER compulsorily.

 

The 10Ω resistor is provided for limiting the current through BASE.  This BASE current limiting resistor is important. Could be chosen accurately by calculating:

 

  • Maximum current through BASE = 1 Amp
  • Choose BASE current = 0.9 Amp
  • Maximum Voltage across BASE and EMITTER= 5 Volt
  • Choose Vbe = 4.5
  • Voltage across resistor R = CONTROL UNIT VOLTAGE OUTPUT – 4.5 = XX V
  • Resistor R = XX/0.9 = YYΩ.
  • Put YY Ω resistance in series with base as shown in circuit.

 

Under normal conditions the TRANSISTOR will be OFF as these will be no BASE current. When the CONTROL UNIT voltage pulses reaches BASE then current flows through BASE of TRANSISTOR. With BASE current flow, TRANSISTOR gets turned ON. With that there will be COLLECTOR current which flows through MOTOR. So the MOTOR rotates. The MOTOR will be keep rotating until there will be BASE current.

 

When the CONTROL UNIT output goes LOW the BASE current becomes ZERO. The TRANSISTOR gets turned OFF when the BASE current becomes ZERO. So the COLLECTOR current also becomes ZERO, bringing MOTOR to STOP.  

 

This way we can use TIP31C as a switching device. The circuit used above is a simple testing circuit and is not an application circuit.  Using it without arrangements like HEAK SINK, FLYBACK DIODE etc, will damage the device.

 

For using the TIP31C as an amplifier one needs to consider current gain characteristics. So we will introduce the CURRENT GAIN graph of TIP31C for better understanding. The typical DC GAIN graph of TIP31C is given below.

From graph the GAIN is almost 100 when COLLECTOR current is 1000mA or 1A. And GAIN drops to 60 when COLLECTOR current is 2000mA or 2A. When COLLECTOR current goes beyond 2A the GAIN is almost linear. This parameter value is important for APLIFIERS. By taking these ranges into consideration we can make appropriate arrangements for better performance.


How to Safely Long Run TIP31C in a Circuit

 

To run TIP31C transistors safely for years, it is recommended to always stay 20% below the maximum ratings. Using components at their maximum ratings may result in a shorter life span. To provide the required base current to the transistor, always use a suitable base resistor. In peak or pulse mode, do not drive a load greater than 100V and 3A, and do not drive a load greater than 5A. Also, always store and operate the transiator at temperatures above -65 degrees Celsius and below +150 degrees Celsius.


TIP31C Functional Equivalents

Part Number Description Manufacturer

TIP31CA

TRANSISTORS

Power Bipolar Transistor, 3A I(C), 100V V(BR)CEO, 1-Element, NPN, Silicon, TO-220AB, Plastic/Epoxy, 3 Pin Motorola Semiconductor Products

TIP31CUA

TRANSISTORS

3A, 100V, NPN, Si, POWER TRANSISTOR, TO-220AB Motorola Mobility LLC

TIP31CU

TRANSISTORS

Power Bipolar Transistor, 3A I(C), 100V V(BR)CEO, 1-Element, NPN, Silicon, TO-220AB, Plastic/Epoxy, 3 Pin Motorola Semiconductor Products

TIP31CDW

TRANSISTORS

3A, 100V, NPN, Si, POWER TRANSISTOR, PLASTIC, TO-220AB, 3 PIN ON Semiconductor

TIP31CG-T60-K

TRANSISTORS

Power Bipolar Transistor Unisonic Technologies Co Ltd

TIP31C16A

TRANSISTORS

3A, 100V, NPN, Si, POWER TRANSISTOR, TO-220AB Motorola Mobility LLC

TIP31CG-TA3-T

TRANSISTORS

Power Bipolar Transistor, 3A I(C), 100V V(BR)CEO, 1-Element, NPN, Silicon, TO-220AB, Plastic/Epoxy, 3 Pin, HALOGEN FREE, TO-220, 3 PIN Unisonic Technologies Co Ltd

TIP31CG

TRANSISTORS

Power Bipolar Transistor, Galaxy Microelectronics

TIP31C-C

TRANSISTORS

Power Bipolar Transistor Secos Corporation

TIP31C-6226

TRANSISTORS

5A, 100V, NPN, Si, POWER TRANSISTOR, TO-220AB Intersil Corporation

 


TIP31C Popularity by Region

TIP31C Popularity by Region


TIP31C Market Price Analysis

TIP31C Market Price Analysis


TIP31C Manufacturer

Fairchild Semiconductor International, Inc. was an American semiconductor company based in San Jose, California. Founded in 1957 as a division of Fairchild Camera and Instrument, it became a pioneer in the manufacturing of transistors and of integrated circuits. The Company offers load switches, transistors, sensors, drivers, transceivers, and automotive products. In September 2016, Fairchild was acquired by ON Semiconductor.


Component Datasheet

TIP31C Datasheet

Ordering & Quality

Photo Mfr. Part # Company Description Package PDF Qty Pricing
(USD)
TIP31C TIP31C Company:Renesas Electronics America Inc Remark: Package:N/A
N/A
In Stock:On Order
Inquiry
Price:
Call
Inquiry

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