C945 transistor

C945 transistor specification

• It is a bipolar NPN BJT Transistor
• DC Current Gain range is 40 to 700h_FE
• Collector current (I_C) is 150mA
• Collector to base Voltage (V_CB) is 60V
• Collector to emitter voltage (V_CE) is 50V
• Emitter to base voltage (V_EB) is 5V
• Noise figure value is 10dB
• Transition frequency (F_T) 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

 

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.

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 

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.

Characteristics	C945	C1815	H945	BC547
Collector to base voltage (VCB)	60V	60V	60V	50V
Collector to emitter voltage (VCE)	50V	50V	50V	45V
Emitter to base voltage (VEB)	5V	5V	5V	6V
Collector current (IC)	150mA	150mA	150mA	100mA
Power dissipation	400mw	400mw	250mw	500mw
Junction temperature (TJ)	125°C	125°C	150°C	150°C
Transition frequency (FT)	200MHZ	80MHZ	250MHZ	300MHz
Noise (N)	10dB	10dB	4dB	10dB
Gain (hFE)	40 to 700hFE	70 to 700hFE	90hFE	110 to 800hFE
Package	TO-92	TO-92	TO-92	TO-92

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 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.