2SA473 Transistor Pinout, Equivalent, Applications, Features and More

A473 complete part number 2SA473 is a PNP transistor available in TO-220 package. It is a PNP transistor built for power amplifier applications. This article contains information about 2SA473 transistor pinout, equivalent, applications, features and other details.

Absolute Maximum Ratings:

• Package Type: TO-220
• Transistor Type: PNP
• Max Collector Current(I_C): –3A
• Max Collector-Emitter Voltage (V_CE): –30V
• Max Collector-Base Voltage (V_CB): –30V
• Max Emitter-Base Voltage (VEBO):-5V
• Total Power Dissipation (PC): 10 Watts
• Max Transition Frequency (fT): 100 MHz
• Minimum & Maximum DC Current Gain (h_FE): 70 – 240
• Max Storage & Operating temperature Should Be: -55 to +150 Centigrade

 

NPN Complimentary:

NPN Complementary 2SA473 is 2SC1173

 

Replacement and Equivalent:

BDT82, BD936, BD934, BD798, BD738, BD546, BD544, BD540, BD534, BD302, BD244, BD242, BD202, 2SB948A, 2SB942, 2SB919, 2SB858, 2SB834, 2SB825, 2SB762, 2SB553, 2SB435, 2SB1548, 2SB1187, 2SB1136, 2SB1135, 2SB1133, 2SA770, 2SA614, 2SA489, 2SA1488, 2SA1470, 2SA1451A, 2SA1328, 2SA1305, 2SA1290.

 

2SA473 Transistor Explained / Description:

2SA473 is a power transistor designed for audio amp applications. It contains many good features such as good hFE linearity, up to 5W amplification capability, availability of its complimentary transistor, etc.

Looking at the absolute maximum ratings of the transistor, the collector current is -3A, collector-emitter voltage is -30V, collector-base voltage is 5V, collector power dissipation is 10W and storage and junction temperature is from -55°C to 150°C.

As mentioned above this transistor is made for audio amplifier applications. However, it can also be used in other applications including RF and other general purpose applications.

The transistor is available in two different variations according to its DC current gain and can be identified with the help of a letter written after the part number. The letter “O” indicates the DC gain of 70 to 140 and letter “Y” indicates the gain of 120 to 240.

 

How to Use This Transistor:

This is a BJT (Bipolar Junction Transistor) so the using procedure is same as we use any other BJT by providing signals at its base pin, giving negative voltage to its to its emitter pin and receiving amplified output from the collector pin in amplifier circuit and driving load from its collector pin in switching circuit.

This is a simple guide to understand the transistor. However, to make an actual working circuit the user must require some basic knowledge of electronics.

 

Applications:

Switching Circuit

Audio Systems

Low Frequency Power Amps

Motor Drivers

Power Amplifiers

RF Circuits

And Other General Purpose Circuits

 

Safe Operating Guidelines:

To safely operate the transistor follow these guidelines:

• Do not use the transistor to its absolute max ratings, and stay at least 20% below from these ratings.
• Always check pin out of the transistor.
• Always use a suitable heatsink with the transistor.
• Always store or operating the transistor at temperatures above -55°C and below 150°C.

 

Datasheet:

To download the datasheet just copy and paste the below link in your browser.

https://www.alldatasheet.com/datasheet-pdf/view/264260/ISC/2SA473.html