C945 transistor

C945 transistor
C945 transistor

C945 transistor specification

  • It is a bipolar NPN BJT Transistor
  • DC Current Gain range is 40 to 700hFE
  • Collector current (IC) is 150mA
  • Collector to base Voltage (VCB) is 60V
  • Collector to emitter voltage (VCE) is 50V
  • Emitter to base voltage (VEB) is 5V
  • Noise figure value is 10dB
  • Transition frequency (FT) is 50MHz

 C945 transistor pinout

Pin Number Pin Name Description
1 Emitter Current flows out through emitter
2 Collector Current flow through the collector
3 Base The base terminal triggers the transistor


C945 transistor pinout
C945 transistor pinout

TO-92 package

  • The transistor for C945 is the TO-92 package
  • It is made up of plastic epoxy material, and it had high thermal resistance properties.
  • The TO-92 package makes the C945 transistor more compatible.
TO-92 package
TO-92 package

If you need the datasheet in pdf please click this link

C945 Description

  • The Pinout details of the C945 transistor are much different from other transistors.
  • The current gain range of C945 starts from 40 to 700hFE, this value is important for amplifier applications.
  • The maximum current allotted towards the C945 transistor is 150Ma.
  • The power dissipation on this transistor is 400mw, this shows the maximum value of power dissipation by a transistor.
  • The transition frequency of this transistor is 200MHZ, this is an important factor in the switching applications.
  • The maximum junction temperature at this transistor is 125°C.

C945 transistor datasheet 

C945 transistor datasheet 
C945 transistor datasheet

If you need the datasheet in pdf please click this link

C945 transistor Equivalent

  • The equivalent transistor for C945 is 2SC1815, 2SC2458, 2SC3198, C1815, and KSC1815.
  • Each of the transistors in this list is the perfect equivalent for C945.
  • The technical specifications of all the transistors are the same.

C945 vs C1815 vs H945 vs BC547

  • The table below really compares each of the prefect equivalent transistors for the C945 transistor.
  • The technical and physical specifications of each transistor will be listed here for better understanding.
Collector to base voltage (VCB)60V60V60V50V
Collector to emitter voltage (VCE)50V50V50V45V
Emitter to base voltage (VEB)5V5V5V6V
Collector current (IC)150mA150mA150mA100mA
Power dissipation400mw400mw250mw500mw
Junction temperature (TJ)125°C125°C150°C150°C
Transition frequency (FT)200MHZ80MHZ250MHZ300MHz
Noise (N)10dB10dB4dB10dB
Gain (hFE)40 to 700hFE70 to 700hFE90hFE110 to 800hFE

C945 transistor uses 

  • Sensor circuits
  • Preamp circuits
  • Switching circuits
  • RF circuits
  • Amplifier circuits

C945 amplifier  

  • The main application of the C945 transistor in amplifier circuits is preamp networks.
  • The figure shows the preamp circuit using C945, the circuit consists of very few components.
  • At the input resistor and capacitor make a bypassing path for DC voltage.
  • And the resistor provides the biasing voltage to trigger the transistor, and make an amplified signal.
  • The capacitor used at the output also makes a bypassing path, this circuit will make a good preamp circuit.
C945 amplifier  
C945 amplifier

C945 transistor price

  • The C945 is a common transistor type used in most applications.
  • The price for a single piece of C945 transistor is around 0.15 USD dollars or 11rs.

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