A1012 Transistor Pinout, Features, Equivalents, Applications and More

2SA1012 or A1012 is a PNP transistor available in TO-220 package. In this post we will understand its pinout, features, equivalents, applications and more about this device.

 

Absolute Maximum Ratings:

• Package Type: TO-220
• Transistor Type: PNP
• Max Collector Current(I_C): –5A
• Max Collector-Emitter Voltage (V_CEO): –50V
• Max Collector-Base Voltage is (V_CBO): -60V
• Max Emitter-Base Voltage (VEBO): –5V
• Max Collector Power Dissipation (Pc): 25W
• Minimum & Maximum DC Current Gain (h_FE): 70 to 240
• Max Storage & Operating temperature Should Be: -65°C to 150°C

 

NPN Complimentary:

NPN Complementary of 2SA1012 is 2SC2562

 

Replacement and Equivalent:

BD800, BD808, BD954, BD950, BD546/A/B/C, BD544A/B/C, BD544A/B, BD540/A/BC, /bd536,  BD244/A/B/C, 2SB995, 2SB1367, 2SB1135, 2SB1019, 2SB1018, 2SB1016, 2SA771, 2SA1471, 2SA1016, 2SB1016, 2SA770, 2SA1471, 2SA1469, 2SA1452, 2SA1451, 2SA1329, 2SA1308, 2SB903, 2SB1294, 2SB1292, 2SB1290, 2SB1289.

 

2SA1012 Transistor Explained / Description:

2SA1012 OR A1012 is a TO-220 package PNP transistor designed to be used in switching applications but can also be used in audio amplifier applications, the transistor possesses many good features such as high speed switching capability, low collector saturation voltage, transition frequency of 60MHz etc.

The absolute maximum ratings of the transistor are collector-emitter voltage is -50V, collector current is -5A collector-base voltage is -60V, emitter-base voltage is -5V, collector power dissipation 25W, junction temperature is 150°C and storage temperature is -55°C to 150°C.

The transistor is available in two different gain versions and can be determined with the help alphabet written after the part number, if that alphabet is “O” its gain will be from 70 to 140 and if that alphabet is “Y” it gain will be 120 to 240.

 

How to Use This Transistor:

The procedure of using this transistor is same as we use any other BJT transistor. If you want to use it as a switch then apply signals at its base through a suitable current limiting resistor, usually a value of 1k to 10K can be used. Connect the emitter pin with the positive rail of the circuit and the load will be connected between collector and ground or negative rail of the circuit.

To use it as an amplifier apply signals which you want to amplify at its base through an electrolytic capacitor of any value from 1uF to 10uF. Connect emitter pin with the positive supply of the circuit and the amplified output will be received at its collector pin. You can connect a speaker between collector and ground.

It is to be noted that it is a basic audio amplifier circuit and to make it better you have to use some passive components.

 

Applications:

Audio Amplifiers

Converters

Battery Charger Circuits

Power Supplies

Motor Controller Circuits

DC-DC Converters

Inverters

Voltage regulators

Lighting Control Circuits

Telecommunication

 

Safe Operating Guidelines:

To safely operate the transistor always use it at least 20% below from its absolute maximum ratings. For example, the maximum collector current is -50mA but by following the above 20% rule do not exceed 40mA, the maximum collector-emitter voltage is -150V, but we recommend to use not more than -120V. Additionally, the operating temperature should be between -55°C to 150°C.

 

Datasheet:

Here are the safe operating guidelines of the transistor.

• Always use the transistor at least 20% below from its max ratings.
• Use a suitable heatsink with the transistor.
• Always Store and operate the transistor between 65°C to 150°C.