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BC558 Is A Transistor That Can Be Used In Many types Of Classic motive suit. It Can Be Used As For Any Type Of Motive Amplification Or Switching. For Using It As A Switch To Oprate Load It Can Be regin 100mA Of Load With 30volt. The Collector excess Is 500mW And Max DC Gain Is 800 So It Can Also Be Use As Audio Preamplifier And Audio Amplification point. The Base Voltage Of Emitter Is -5volt Due To Which This Transistor Can Also Be Used At The Output Of Microcontrollers.

The Device Make In Three Different Type Of Numbers Like BC558A, BC558B And BC558C And The Only Difference Among These Three wedgeNumbers Are Their HFE Cost Which Can Be Decet By Research The Last Alphabet After The Number, If The Last Alphabet Is “A” Then The HFE Cost Will Be 110-To-220, If “B” Then 200-To-450 And If Its “C” Then It Will Be 420-To-800. The Pin Configuration Of BC558  Transistor Pinout.

Review Of BC 558 Transistor 

  • Type Of Bundle: TO-92
  • Type Of Transistor : PNP
  • Max  Collector Current(IC): -100mA
  • Max  Collector And Emitter Voltage (VCE): -30V

  • Max Collector-To-Base Voltage (VCB): -30V

  • Max Emitter-To-Base Voltage (VBE): -5V
  • Collector Dissipation (Pc): 500 Milli watt
  • Transition rate of repetition (FT): 100 MHz
  • DC Current Gain (HFE): 110 – 800
  • Storage And Oprated Temperature Should Be: -65 To +150Centigrade

Total of NPN Transistor

The Complement Of BC558 NPN Transistor Is: BC547
Replacement Of Bc B558 

The Alternative Of BC558 NPN Transistors Are: BC5592N3906BC3382N4403A1015, BC557 

We Can Use BC558

These Transistors Are Make  For Typical Purpose Applications Can Be Use In Any Types Of Common Requirements In Electronic Circuits. For A Example If Use As A Switch It Can Be Control Any Load Under 100mA Like Relays, Integrated Circuits LEDs, Other Big Transistors Etc. On The Other Hand It Can Also Be Use As A Preamplifier Or Audio Amplifier And For Any Type Of Signal Amplification.

  • Darlington Pair
  • Audio Amplifier
  • Any Signal Amplification
  • Preamplifier
  • Drive Load Under 100mA

Suit of BC558

  • Darlington Pair
  • Audio Amplifier
  • Any Signal Amplification
  • Preamplifier
  • Drive Load Under 100mA


To Get Long Term Form BC558 It Is Approbe drive Load More Than 100mA So Do Not Oprated Load Of Over and Obve 30V, Always Use Asatisfactory Base Resistor, Must Be Check Pin Configuration Before Setting In The Circuit And Do Not Operated Of Store It In Temperature Under The -65 Centigrade And Above +150 Centigrade.

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