2SD424 transistor

2SD424 transistor
2SD424 transistor

2SD424 transistor electrical specification

  • 2SD424 is a silicon NPN POWER transistor device
  • Collector to emitter voltage is 180V
  • Collector to base voltage is 180V
  • Emitter to base voltage is 5V
  • Collector current is 15A
  • Pulsed collector current is 20A
  • Base current is 5A
  • Power dissipation is 150W
  • DC current gain is 40 to 140hFE
  • Transition frequency (FT) is 5MHz
  • Junction temperature is between -55 to 150℃
  • Thermal resistance between, the junction to the case is 1℃/W
  • Collector to emitter saturation voltage (VCE (SAT)) is 3V
  • Output capacitance is 300Pf
  • High power dissipation
  • High collector to an emitter breakdown voltage


Pin Number Pin Name Description
1 Base Base terminal is the trigger for the transistor
2 Emitter  Current flows through the emitter
3 Collector Current flows through the collector


2SD424 package

The 2SD424 power transistor has a TO-3 package, it is a bulkier device package used for power applications.

TO-3 is a two-terminal device and the body itself acts as the third terminal, the outer covering is made of metal which will act as the heat sink for the circuit.

2SD424 transistor electrical specification & application note

Here in this section, we explain the electrical specifications of the 2SD424 transistor, this explanation is really useful for a better understanding of the device and helpful for the replacement process.

Voltage specs

The terminal voltage specifications of the 2SD424 transistor are collector to emitter is 180V, collector to the base is 180V, and emitter to the base is 5V, the voltage values indicate it is a high voltage device.

The collector-to-emitter saturation voltage is 3V, which is the voltage used to switching the device.

Overall, the voltage specs show it is a higher-voltage device used for power applications.

Current specs

The collector current value of the 2SD424 transistor is 15A, it is the maximum load capacity of the device.

The base current value of the 2SD424 transistor is 1.5A, this value indicates the switching current of the device.

2SD424 transistors are been used for power switching applications, on such circuits load capacity is very important.

Dissipation specs

The power dissipation value of the 2SD424 transistor is 150W, it is the product of voltage and current produced by the transistor.

DC current gain specs

The DC current gain value of the 2SD424 transistor is 40 to 140Hfe, this value is important for amplifier applications.

Transition frequency

Transition frequency value of the 2SD424 transistor is 5MHz, frequency value had important at the circuit level.

Maximum temperature value 

The maximum temperature value of the 2SD424 transistor is -55 to +150℃.

Output capacitance

The output capacitance value of the 2SD424 transistor is 300pF, capacitance values are very important for audio-related applications.


If you need the datasheet in pdf please click this link

2SD424 equivalent

2SD424 power transistor have equivalent devices such as 2N6676, 2SD753, 2SD0602, 2SD1001, 2SD0602A and 2SD0814A, each of these transistors have almost same electrical specifications.

The 2SD424 transistors have power applications, so specifications like the voltage, current, DC current gain, and PINOUT details are been checked and verified before the replacement process.

2SD424 vs 2N6676

Here in the table below, we list and compare the electrical specifications of 2SD424 and 2N6676, this comparison is really useful for a better understanding of the device.

Collector to base voltage (VCB)     180V450V
Collector to emitter voltage (VCE)180V300V
Emitter to base voltage (VEB)5V8V
Collector to emitter saturation voltage (VCE (SAT))3V1.5V
Collector current (IC)15A15A
Pulsed collector current-20A
Base current1.5A5A
Power dissipation150W175W
Junction temperature (TJ)-55 to +150°C-65 to +200°C
Transition frequency (FT)5MHZ3 to 10MHZ
Gain (hFE)40 to 140hFE8hFE
Output capacitance300pF500pF

2SD424 applications   

  • Power amplifier applications
  • Switching circuit applications
  • Voltage regulator circuit

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