2SC1815 transistor
2SC1815 transistor specification
- 2SC1815 is an NPN transistor
- Collector to emitter voltage is 50V
- Collector to base voltage is 60V
- Emitter to base voltage is 5V
- Collector current is 150mA
- Base current is 50mA
- Power dissipation is 400mW
- DC current gain is 70 to 700hFE
- Transition frequency (FT) is 80MHz
- Junction temperature is between –55 to 150℃
- Noise figure (NF) is 10dB
- Collector to emitter saturation voltage (VCE (SAT)) is25V
- Audio frequency
- Driver stage amplifier
2SC1815 transistor Pinout
| Pin Number | Pin Name | Description |
| 1 | Emitter | Current flows through the emitter terminal |
| 2 | Collector | Current flows through the collector |
| 3 | Base | The base is the trigger for the transistor |
2SC1815 transistor package
The 2SC1815 transistor had the package of TO-92, it is commonly used as the general-purpose transistor device at electronic circuits.
The TO-92 is a transistor package made with epoxy and plastic, main advantage of this package is its compact nature and heat resistance with a small package.
2SC1815 transistor electrical specification description
The 2SC1815 is a transistor mainly used as the audio system component, in this section, we try to explain the voltage specifications separately.
The separate specs explanation will help us to know about this particular transistor and this is very useful for the replacement process.
Voltage specs
The terminal voltage specs of the 2SC1815 transistor such as collector to base voltage are 60V, collector to emitter voltage is 50V, and emitter to base voltage is 5v, the voltage specs show that the 2SC1815 transistor is a medium power audio device component.
Current specs
The collector current specs are 150mA, this is the load capacity and this shows it is a low power device.
Dissipation specs
The power dissipation value is 400mW, the dissipation value is the heat or power capacity of a device.
Current gain specs
The DC current gain value is 70 to 700hFE for a 2SC1815 transistor, this is the proper gain value for an amplifier device.
Transition frequency
The transition frequency is 80MHz for the 2SC1815 transistor, the frequency value is important for switching and amplifier applications.
Junction temperature
The junction temperature of -55 to 150℃, this is the most common temperature value for a medium power transistor device.
Noise figure
The noise figure value for the 2SC1815 transistor is 10dB, the noise figure value is moderate for an amplifier device.
Collector to the emitter saturation voltage
The collector to emitter saturation voltage value is 0.25v for 2SC1815 transistor, this is the switching voltage for a transistor device.
2SC1815 transistor DATASHEET
If you need the datasheet in pdf please click this link
2SC1815 transistor equivalent
The transistors such as 2SC2458, 2SC3198, 2SC3918, 2SC3919, KSC1815, and KTC3199, are the equivalent transistors of 2SC1815.
Each of the transistors in this list had the same electrical specifications, this is why they all are known as the perfect equivalent for the 2SC1815 transistor.
This section is very useful for the replacement process of 2SC1815 with a proper one.
2SC1815 vs 2N3904 vs 2SC1845
The table will explain the comparison between 2SC1815 vs 2N3904 vs 2SC1845 electrical specs of each transistor will give us an idea about the transistor.
| Characteristics | 2SC1815 | 2N3904 | 2SC1845 |
|---|---|---|---|
| Collector to base voltage (VCB) | 60V | 60V | 120V |
| Collector to emitter voltage (VCE) | 50V | 40V | 120V |
| Emitter to base voltage (VEB) | 5V | 60V | 5V |
| Collector current (IC) | 150mA | 200mA | 50mA |
| Power dissipation | 400mW | 625mW | 0.5W |
| Junction temperature (TJ) | 150°C | 150°C | 150°C |
| Transition frequency (FT) | 80MHZ | 300MHZ | 100MHZ |
| Noise (N) | 10dB | 6dB | - |
| Gain (hFE) | 70 to 700hFE | 30 to 300hFE | 200 to 1200hFE |
| Package | TO-92 | TO-92 | TO-92 |
In the table, we try to explain the three 2SC1815 vs 2N3904 vs 2SC1845 specs, most of the specs of 2SC1815 and 2N3904 are the same, the frequency value is higher at 2N3904 and DC gain is higher at 2SC1815.
And the 2SC1845 transistor is the most powerful in this list, the voltage value is higher at it.
The DC gain value is higher at 2SC1845, this is why 2SC1845 is better at amplifier applications.
2SC1815 transistor characteristics
The figure shows the DC current gain vs collector current characteristics curve, as when the voltage increases the gain value and gets into a constant value and the collector current will decrease at a point.
The figure shows the curve between collector current vs collector to emitter voltage, at each base current the collector current increases at a constant rate and voltage value will become constant after a particular point.
