The C945 transistor is a general-purpose NPN transistor that is widely used in a variety of commercial and educational electronic circuits. It comes in a TO-92 package. This transistor can drive a max load around 150 mA, which is enough to operate many devices in a circuit for LEDs, relays, ICs, transistors, and other parts of electronic circuits. The saturation of this transistor is only 0.3V DC; it is also a good feature of this transistor. Moreover, the transistor is also a low-noise device and has a good DC current gain that is 70 to 700. The C945 Transistor Pinout explains all features of the transistor.
Features of C945 Transistor
- Type of Package: TO-92
- Type: NPN
- Collector Max Current (IC): 150 mA
- Collector-Emitter max Voltage (VCE): 50V
- Collector-Base Max Voltage (VCB): 60V
- Emitter-Base Max Voltage (VEBO): 5V
- Collector Max Dissipation (Pc): 400 milliwatts
- Transition Max Frequency (fT): 200 MHz
- Min & Max DC Current Gain (hFE): 70 – 700
- Max Storage and Operating temperature Should Be: -55 to +150 Centigrade
Alternate Of C945 Transistor
It can be replaced with 2N2222, 2N3904, 2SC1815, or 2SC3198. Nowadays BC547 is a good alternate for this transistor. The pin configuration of some transistors is different from C945, so check the pin configuration before replacing them in the circuits.
PNP Complementary of this Transistor
The NPN complements of C945 are A733, BC557, BC557, BC558, and BC556B.
Applications of C945
- It is used in sensor circuits.
- Use in Audio Preamplifiers
- Use in Audio Amplifier Stages
- Use in switching loads under 150 mA.
- It is also used in Darlington pairs.
- RF Circuits also used C945
Uses of C945 Transistor
This transistor has a good DC current gain and low noise; due to this, it is suitable to use in audio amplifier circuit stages or for the amplification of other electronic circuits. Saturation voltage of most BJT transistors is 0.6V DC, but the C945 has only a transistor that has 0.3V saturation voltage. Due to this feature, it can perform well in low-voltage circuits or in any circuit where low base voltage is available.
C945 Datasheet
The datasheet of C945 Transistor is C945 Bipolar NPN Transistor Datasheet
C945 Transistor Dimensions
C945 Manufacturer
Feihong Machinery and Electrical Co. is the main manufacturer of the C945 transistor.
C945 vs C1815 vs H945 vs BC547
A detailed comparison table is given below among these 4 transistors. We can easily determine our requirements as needed and we can use a suitable transistor for our application.
Characteristics of C945, C1815, BC547, H945
|
Description
|
C945
|
C1815
|
BC547
|
H945
|
|---|---|---|---|---|
| Collector-to-base voltage (VCB) | 60V | 60V | 50V | 60V |
| Collector-to-emitter voltage (VCE) | 50V | 50V | 45V | 50V |
| Emitter-to-base voltage (VEB) | 5V | 5V | 6V | 5V |
| Collector current (IC) | 150 mA | 150 mA | 100 mA | 150 mA |
| Power dissipation | 400 mW | 400 mW | 500 mW | 250 mW |
| Junction temperature (TJ) | 125°C | 125°C | 150°C | 150°C |
| Transition frequency (FT) | 200 MHz | 80 MHz | 300 MHz | 250 MHz |
| Noise | 10 dB | 10 dB | 10 dB | 4 dB |
| Gain (hFE) | 40 to hFE | 70 to hFE | 110 to hFE | 90hFE |
| Package | TO-92 | TO-92 | TO-92 | TO-92 |