2SA1987 Transistor Pinout, Equivalents, Applications, Features and Other Useful Info

In this post I am going to discuss a very interesting transistor designed to be used in power amplifiers, stereo amplifier, and etc. but due its good specs it can also be used in variety of other applications. This post contains 2SA992 transistor pinout, equivalents, applications, features and other details about this component.

Absolute Maximum Ratings:

• Package Type: TO-3PL
• Transistor Type:  NPN
• Max Collector Current(I_C): -15A
• Max Collector-Emitter Voltage (V_CE): –230V
• Max Collector-Base Voltage (V_CB): –230V
• Max Emitter-Base Voltage (V_EBO): –5V
• Max Collector Dissipation (Pc): 180 Watt
• Max Transition Frequency (fT): 30 MHz
• Minimum & Maximum DC Current Gain (h_FE): 55 To 160
• Max Storage & Operating temperature: -55 to +150 Centigrade

 

NPN Complementary:

NPN Complementary of 2SA1987 is 2SC5359

 

Replacement and Equivalent:

2SA1692, MJW1302, 2SA1943, MJL1302

 

2SA1987 Transistor Explained / Description:

2SA1987 is a TO-3PL package transistor designed to be used in audio amp applications, but due to its good electrical characteristics, it can also be used in variety of other applications. The transistor is packed with some very good features such as high collector to emitter voltage, good collector current, upto 30MHz transition frequency, availability of its complimentary transistor.

Now Looking at the absolute maximum ratings of the transistor the collector current is the collector current is -15A, collector to emitter voltage is -230V, emitter-base voltage is -5V, base current is 1.5A, junction temperature is +150°C and storage temperature is from -55°C to +150°C.

The transistor is available in two versions according to its DC current gain. Both the versions can be identified with the help of the alphabet written after the part number. If that alphabet is “R” then the DC current gain of the transistor will be from 55 to 110 and if that alphabet is “O” then its DC current gain will be from 80 to 160.

 

How to Use This Transistor:

It is a bipolar junction transistor (BJT) therefore the using procedure is same as we use any other BJT by applying signals to its base, applying negative voltage to its emitter and taking the output from its collector pin.

 

Applications:

High power audio amplifiers

Battery Management and Charging

UPS

Audio amplifier stages

Power supplies

Motor Drivers

Drive load of up to 15A

 

Safe Operating Guidelines:

Here are some guidelines to safely operate the transistor which also make sure that the device will perform well and also work long term. First of all it is recommended that do not use the transistor to its absolute maximum ratings and always stay 20% below from these ratings. So according these guidelines the max collector to emitter voltage is -230V but we will not drive load of more than 184V. The maximum collector current is -15A but by following the above 20% rule for the safety of the transistor we will not use more than 184V. Moreover the operating temperature should be between 55°C to +150°C and always use a suitable heatsink with the transistor.

 

Datasheet:

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

https://www.mouser.com/datasheet/2/408/2SA1987_datasheet_en_20131101-1649848.pdf