KSA1220 Transistor, Features, Uses, pinout

KSA1220 PNP Transistor Amplifier

The KSA1220A transistor is a PNP from ON Semiconductors. It is a PNP Power amplifier transistor which is commonly used for high frequency amplification and Audio frequency (AF) amplification. It is commonly used in Class B Amplifier circuits or projects. The Class B amplifiers require a NPN and PNP  both transistor to amplify the positive and negative potion of an audio wave. In these circuits the KSA1220A is used as PNP transistor and KSC2690A NPN transistor is used.

KSA1220 Pin Description

KSA1220 PNP Transistor Amplifier

Pins detail with descrection is given below in the table

Pin Number Pin Name

Pin Descreption

1 Emitter Current Drains out through emitter
2 Collector Current flows in through collector
3 Base Controls the biasing of transistor

Characteristics of KSA1220 Transistor

  • Package: TO-126
  • Type of transistor: PNP
  • Max Collector-Emitter Voltage: -120 V
  • Max Collector-Base Voltage: -120 V
  • Max Emitter-Base Voltage: -5 V
  • Collector Dissipation: 20 W
  • Collector Current: -1.2 A
  • DC Current Gain maximum (hfe): 60 to 320
  • Max Transition Frequency: 175 MHz
  • Operating and Storage Range: -55 to +150 °C

Complementary NPN transistor

The complementary NPN transistor to the KSA1220 transistor is the KSC2690 hoever you can use any other related transister.

Equivalent Of KSA1220 transistor

the equivalent of KSA1220 transistor are  2SA1021, 2SA1220, 2SA1220A, KSA1220A or 2SB649.

SMD Version of KSA1220-Y transistor

SMD version of the KSA1220-Y transistor is 2SB806 (SOT-89) and 2SD1007 (SOT-89).

Application of KSA1220A Transistor

  • Mostly used in Audio Amplifiers
  • Portable speakers
  • Class B amplifiers designs

2D-Model (TO-126)

2D-Model-of-KSA1220A-PNP-Transistor

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