Description

TIP31C TIP31 NPN Power Transistor TO-221

3 Emitter (E): Normally connected to GROUND

2 Collector (C): Normally connected to LOAD

1 Base (B): Normally used as TRIGGER to turn ON the TRANSISTOR.

TIP31C Features and Specifications
Medium power TRANSISTOR
With hfe gain up to 50
With hfe improved linearity
Maximum voltage across COLLECTOR and EMITTER of TRANSISTOR: 100V
Maximum current allowed trough TRANSISTOR COLLECTOR: 3A DC
Maximum voltage across BASE and EMITTER of TRANSISTOR:5 V
Maximum current allowed trough TRANSISTOR BASE: 1A DC
Maximum voltage across COLLECTOR and BASE of TRANSISTOR: 100V
Maximum operating Temperature: 150ºC
TIP31C Equivalents
TIP31C TRANSISTOR has many replacements like TIP31A, 2N6122, TIP31B, MJE340K, SW4F013. We need to check parameters and Pin configuration carefully before replacing. Replacing without considering voltage, current and gain parameters may lead to permanent damage.

Where to Use TIP31C
For understanding the use of TIP31C consider:

Case1: 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.

Case2: 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.

Case3: 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.

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