2SC5171 transistor

2SC5171 transistor specification
- 2SC5171 is a POWER amplifier NPN transistor
- Collector to emitter voltage is 180V
- Collector to base voltage is 180V
- Emitter to base voltage is 5V
- Collector current is 2A
- The Base current is 1A
- Power dissipation is 2W
- DC gain is 50 to 320hFE
- Gain Bandwidth (FT) is 200MHz
- Junction temperature is between 150℃
- Collector to emitter saturation voltage (VCE (SAT)) is16 to 1V
2SC5171 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 |

2SC5171 transistor package
The package used at the 2SC5171 transistor is TO-220F, it is a common type of power transistor.
The TO-220F is a bulky transistor specially made to withstand higher temperature variations, the package had the provision to attach a heat sink with it.
2SC5171 transistor electrical specification & application description
Voltage specs
The collector to base voltage is 180v, collector to emitter voltage is 180v, and emitter to base voltage is 5v, the terminal voltage specification shows that 2SC5171 is a power transistor mainly used for power amplifier and driver stage applications.
The collector to emitter saturation voltage is 0.16v to 1v, the saturation voltage shows the switching of the transistor.
Current specs
The collector current value is 2A, the current value indicates the load capacity of the transistor and this transistor had a higher load value for driver applications.
Dissipation specs
The power dissipation value for the 2sc5171 transistor is 2w, the package made this transistor more heat resistant.
Current gain specs
The current gain value is between 50 to 320hFE
Transition frequency/ Bandwidth frequency specs
The transition frequency is 200MHz, this value shows the transistor frequency range for audio applications.
Junction temperature
The junction temperature of -55 to 150℃, this is the most common temperature value for a power transistor device.
2SC5171 transistor DATASHEET
If you need the datasheet in pdf please click this link
2SC5171 transistor equivalent
The transistor devices such as 2SC4382, 2SD772A, 2SD792A, MJE15032, MJE15034, and MJE15034G are the equivalent for 2SC5171.
The electrical and physical specifications of these transistors are the same as the 2SC5171 transistor, so we can use them as the perfect replacement for the circuits.
2SC5171 vs 2SC4382 vs MJE15034
The table above is the electrical specs comparison between 2SC5171 vs 2SC4382 vs MJE15034.
Characteristics | 2SC5171 | 2SC4382 | MJE15034 |
---|---|---|---|
Collector to base voltage (VCB) | 180V | 200V | 350V |
Collector to emitter voltage (VCE) | 180V | 200V | 350V |
Emitter to base voltage (VEB) | 5V | 6V | 5V |
Collector to emitter saturation voltage (VCE (SAT)) | 0.16V to 1V | 1V | 1V |
Collector current (IC) | 2A | 2A | 8A |
Power dissipation | 2W | 25W | 50W |
Junction temperature (TJ) | 150°C | 150°C | 150°C |
Transition frequency (FT) | 200MHZ | 20MHZ | 30MHZ |
Gain (hFE) | 50 to 320hFE | 60hFE | 100hFE |
Package | TO-220 | TO-220 | TO-220 |
The electrical comparison between 2SC5171 vs 2SC4382 vs MJE15034 shows that these devices are power transistors.
The amplification capability of the 2SC5171 transistor is higher than other transistors, this is due to higher current gain and frequency value.
2SC5171 transistor Complementary
The 2SA1930 is the PNP complementary for the 2SC5171 NPN transistor, every electrical spec of 2SC5171 and 2SA1930 are the same but in opposite directions.
2SC5171 transistor characteristics

The figure shows the collector current vs collector to emitter voltage characteristics of the 2SC5171 transistor.
When the transistor starts at different collector current ranges, the voltage increases in a proper manner and reaches a higher value.

The figure shows the safe operating characteristics of the 2SC5171 transistor, the graph is plotted with different quantities such as collector current, collector to emitter voltage, switching speed, and temperature ranges.
Applications of 2SC5171 transistor
- Power amplifier
- Driver stage amplifier applications
- Driver circuits