KSA1220 PNP Transistor Amplifier

KSA1220 PNP Transistor Amplifier
KSA1220 PNP Transistor Amplifier
KSA1220 Transistor Pinout
KSA1220 PNP Transistor Amplifier
KSA1220 Transistor Pinout

click on image to enlarge

Pin Description

Pin Number

Pin Name




Current Drains out through emitter, normally connected to ground



Current flows in through collector, normally connected to load



Controls the biasing of transistor, Used to turn ON or OFF the transistor



  • High Frequency PNP Transistor
  • DC Current Gain (hFE), typically 150
  • Transition Frequency is 175 MHz
  • Continuous Collector current (IC) is 1.2A
  • Collector Dissipation is 20W
  • Collector-Emitter voltage (VCE) is 160 V
  • Collector-Base voltage (VCB) is 160V
  • Emitter Base Voltage (VBE) is 5V
  • Available in To-126 Package

KSA1220A Equivalent


Equivalent NPN Transistors for KSA1220A


Same Family Transistors

2SA1220A-P, 2SA1249 and 2SA1507

KSA1220A Description and Usage

The KSA1220A is a PNP Transistor form ON Semiconductors. It is a PNP Power amplifier which is commonly used for high frequency amplification and Audio frequency (AF) amplification.

The KSA1220A transistor is commonly used in Class B Amplifier circuits. The Class B amplifiers require a NPN and PNP transistor to amplify the positive and negative potion of an audio wave respectively. In such circuits the KSA1220A is used for the PNP transistor and as its equivalent NPN KSC2690A transistor is used.

Using KSA1220 PNP Transistor As Amplifier

In such circuit when there is no incoming audio signal no current flows and hence a greater efficiency of upto 70% can be achieved. However they suffer from non-linear distortion due to the lad between one transistor switch off and the other switching on. If you are looking at more efficient transistor you can look at class-D amplifiers.

Application of KSA1220A Transistor

  • Audio Amplifiers
  • Portable speakers
  • Class B amplifiers designs

2D-Model (TO-126)

2D Model of KSA1220A PNP Transistor

Related Post


Join 20K+subscribers

We will never spam you.

Be a part of our ever growing community.

Copyright 2020 © Components101. All rights reserved