D718 transistor
D718 transistor electrical specification
- 2SD718 is an NPN epitaxial silicon transistor device
- Collector to emitter voltage is 120V
- Collector to base voltage is 120V
- Emitter to base voltage is 5V
- Collector current is 10A
- Pulsed collector current is 16A
- Base current is 1A
- Power dissipation is 78W
- DC current gain is 55 to 160hFE
- Gain Bandwidth transition frequency (FT) is 12MHz
- Junction temperature & operating temperature is between -55 to +150℃
- Collector to emitter saturation voltage (VCE (SAT)) is 2V
- Output capacitance is 170pF
- High power amplifier applications
- Audio frequency amplifier output stage
- General purpose amplifier device
D718 Pinout
| Pin Number | Pin Name | Description |
| 1 | Base | Base terminal is the trigger for the transistor |
| 2 | Collector | Current flows through the collector |
| 3 | Emitter | Current flows through the emitter terminal |
D718 transistor package
The D718 high power transistor have TO-247 and TO-3P package, both of these packages have almost same bulkier covering.
TO-247/ TO-3P is made of epoxy/plastic material, it will provide higher temperature capacity and compactness as an electronic component.
TO-247/ TO-3P is a three terminal device used for high power applications.
D718 electrical specification & application description
Here in this section we try to explain the electrical specifications of 2SD718 transistor.
Voltage specs
The terminal voltage specifications of D718 transistor is collector to emitter voltage is 120V, collector to base voltage is 120V and emitter to base voltage is 5V.
The collector to emitter saturation voltage is 2V, it is the trigger voltage of the device.
The terminal voltage and saturation voltage specifications of 2SD718/ D718 transistor, indicate it is a power transistor.
Current specs
The current specifications of the transistor shows the load capacity, collector current value of D718 transistor is 10A and base current value is 1A.
The pulsed collector value of D718 transistor is 16A, it is the current value at a specific condition.
The current value of the devices shows, it is higher load capacity device having switching and amplifier applications.
Dissipation specs
The dissipation specifications of D718 transistor is 78W, the power dissipation of the device will be from the package.
Current gain specs
The DC current gain value of 2SD718 transistor is 55 to 160hFE, the gain value of the device indicate the amplification capability.
Transition frequency specs
The frequency value of D718 transistor is 12MHz, the frequency value is very important at circuit level.
Junction temperature/ storage temperature
The maximum temperature value of D718 transistor is -55 to +150℃.
Output capacitance
The output capacitance value of 2SD718 transistor is 170pF
D718 DATASHEET
If you need the datasheet in pdf please click this link
D718 transistor equivalent
The equivalent device of D718 transistor is 2SD1046, 2SD1046D, 2SD979 and 2SD910, each of these devices have almost same electrical specifications, so we can easily replace them as the equivalent for 2SD718 transistor.
The applications such a high power amplifier and power switching, we need to consider the specs such as voltage specs and current specs.
2SD718/ D718 transistor complementary
The D718 NPN transistor have complementary PNP 2SB688 transistor, both have same set of electrical specifications and they had applications at push-pull circuits.
2SD718 vs 2SD960 vs 2SD1046
| Characteristics | 2SD718 | 2SD960 | 2SD1046 |
|---|---|---|---|
| Collector to base voltage (VCB) | 120V | 130V | 120V |
| Collector to emitter voltage (VCE) | 120V | 80V | 150V |
| Emitter to base voltage (VEB) | 5V | 7V | 6V |
| Collector to emitter saturation voltage (VCE (SAT)) | 2V | 0.5V | 2V |
| Collector current (IC) | 10A | 4A | 8A |
| Pulsed collector current (ICM) | 16A | 8A | 12A |
| Base current (IB) | 1A | - | - |
| Power dissipation | 78W | - | 80W |
| Junction temperature & operating temperature (TJ) | -55 to 150°C | -40 to +150°C | -40 to +150°C |
| Transition frequency (FT) | 12MHZ | 30MHz | 15MHz |
| Gain (hFE) | 55 to 160hFE | 60 to 260hFE | 60 to 200hFE |
| Output capacitance | 170pF | - | 160Pf |
| Thermal resistance | - | - | - |
| Package | TO-247/TO-3P | TO-220C | TO-3PN |
D718 transistor uses
- Simple high power audio amplifier
- Switching applications
- Stereo amplifier applications
Characteristics curve of 2SD718 transistor
The graph show the static characteristics of 2SD718 transistor, graph plots with collector current vs collector to emitter voltage.
At different base current values, the collector current increases from lowest value to highest value.
At higher value the collector current increases towards infinity
The figure shows the dc current gain characteristics of 2SD718 transistor, the graph plots with DC current gain vs collector current.
At a constant collector to emitter voltage values, the DC gain values starts from a higher value and become constant and decreases towards the end.
