D2394 transistor

D2394 transistor
D2394 transistor

D2394 transistor electrical specification

  • 2SD2394/D2394 is an NPN power transistor device
  • Collector to emitter voltage is 60V
  • Collector to base voltage is 80V
  • Emitter to base voltage is 7V
  • Collector current is 3A
  • Pulsed collector current is 6A
  • Power dissipation is 2W
  • DC current gain is 100 to 320hFE
  • Current gain-bandwidth transition frequency (FT) is 8MHz
  • Output capacitance (Cob) is 35pf
  • Junction temperature is between -55 to 150℃
  • Collector to emitter saturation voltage (VCE (SAT)) is 1V
  • Low collector saturation voltage
  • Wide SOA (safe operating area)

D2394 transistor Pinout

D2394 transistor Pinout
D2394 transistor Pinout
Pin Number Pin Name Description
1 Base Base terminal is the trigger of the transistor
2 collector Current flow through the collector 
3 Emitter   Current flows through the emitter terminal


D2394 transistor package

The D2394 POWER transistor had a TO-220 package, it is a power device package mainly used for medium power applications.

The TO-220 device package had two portions front end and the back end, the front portion is made with a mixture of plastic and epoxy material and the back portion is made with metal material for attaching a heat sink with it.

The TO-220 is a through-hole device used to withstand higher power values, this is why the D2394 transistor had the bulkier package.

Marking the case

The 2SD2394 transistor component had marked as “D2394” on its case

D2394 transistor electrical specification description/application

In this section, we try to explain the electrical specifications of the D2394 transistor device.

This D2394 transistor specs explanation will be very useful for a better understanding and also for the replacement process.

Voltage specs

The terminal voltage value of the D2394 transistor is a collector to base voltage is 80V, collector to emitter voltage is 60V, and emitter to base voltage is 7V, the voltage specs show that it is a power transistor.

The collector to emitter saturation voltage value is 1V, it is the voltage value naturally lesser than the base voltage.

The voltage specifications of the D2394 transistor show that it is a power transistor device mainly used for power supply applications.

Current specs

The collector current value is 3A, the current specs show the load capacity of the D2394 transistor.

The pulsed collector current value is 6A, it is the current value at a specific condition.

The current specifications of the D2394 transistor show that it is a power transistor mainly used for higher load driver applications.

Dissipation specs

The power dissipation of the D2394 transistor is 2W, the dissipation capacity of this device is mainly due to the component package.

Current gain specs

The current gain value of the D2394 transistor is 100 to 320hFE, the current gain value shows the amplification capacity of the device.

Transition frequency

The bandwidth transition frequency value of the D2394 transistor is 8MHz, it is the frequency range of the transistor.

Junction temperature

 With the junction temperature of -55 to 150℃, the heat capacity of the transistor is mainly dependent on the case.

The TO-220 transistor package had a higher temperature capability.

Output capacitance

The output capacitance value of the D2394 transistor is 35Pf

D2394/2SD2394 transistor DATASHEET

If you need the datasheet in pdf please click this link

D2394 transistor equivalent

The transistors such as 2SC1826, 2SC2075, 2SD1274, BD241A, 2SD823, 2SD613, BD203, and BDX77 are the equivalent devices of D2394.

The electrical specifications of these transistors are the same as the D2394 transistor, so we can use these transistors as the perfect equivalent of the D2394 transistor.

Before the replacement process, we need to check and verify the PINOUT details of the all-transistor.

2SC2078 transistor

D2394 vs 2SC1826 vs BD203

In the table, we listed the electrical specifications of D2394, 2SC1826, and BD203 devices, this is very useful for the replacement process.

Collector to base voltage (VCB)     80V80V60V
Collector to emitter voltage (VCE)60V60V60V
Emitter to base voltage (VEB)7V6V5V
Collector to emitter saturation voltage (VCE (SAT))1V1V1 to 1.5V
Collector current (IC)3A4A8A
Power dissipation2W30W60W
Junction temperature (TJ)-55 to +150°C-55 to +150°C-55 to +150°C
Transition frequency (FT)8MHz10MHz    7MHz
Gain (hFE)100 to 320hFE40 to 320hFE30hFE

The voltage specs of D2394, 2SC1826, and BD203 transistors are almost the same, this is the reason why all of these are used in power supply applications.

The current specs of D2394 and 2SC1826 are the same, then the BD203 transistor had a higher current value.

And the power dissipation value of BD203 is higher and the D2394 transistor had a lower dissipation value.

2SD2394/D2394 SMD version transistor

The NZT560 transistor is the SMD version of D2394, it had the SOT-223 SMD transistor package. The power dissipation value of the NZT560 transistor is low.

D2394/ 2SD2394 complementary

The 2SB1565 is the PNP complementary of the D2394 NPN transistor.

D2394 transistor applications

  • Switching load of 3A
  •  Power supply circuits
  • Motor driver circuits
  • Amplifier circuits

Mini amplifier circuit using D2394 transistor

Mini amplifier circuit using D2394 transistor
Mini amplifier circuit using D2394 transistor

The figure shows the mini amplifier circuit using two D2394 transistors, both left and right sides had amplification stages using D2394 transistor.

It is USB based port, so we need to control or limit high current heavy current from the D2394 transistor.

As when the audio signal reaches the D2394 transistor, it amplifies and produces two signal outputs.

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