Type Designator: 2SD718
Cheap d718 transistor, purchase quality tube transistor directly from Chinese supplier: 5PCS/LOT 2SD718 D718 TO-3P NPN transistor power tube New spot Quality Assurance. D718 is a common transistor we can find out in electronics.d718 high power amplifier NPN Silicon Transistor.it’s an NPN transistor. Negative positive negative. This transistor Recommended 45-50 Watts audio frequency. There have many kinds of amplifier diagram has used this transistor. It’s a simple diagram for the learning people.this is not a real and nice amplifier.
Material of Transistor: Si
Polarity: NPN
Maximum Collector Power Dissipation (Pc): 80 W
Maximum Collector-Base Voltage |Vcb|: 120 V
Maximum Collector-Emitter Voltage |Vce|: 120 V
Maximum Emitter-Base Voltage |Veb|: 5 V
Maximum Collector Current |Ic max|: 8 A
Max. Operating Junction Temperature (Tj): 150 °C
Transition Frequency (ft): 6 MHz
Collector Capacitance (Cc): 170 pF
Forward Current Transfer Ratio (hFE), MIN: 55
Noise Figure, dB: -
Package: TO247
2SD718 Transistor Equivalent Substitute - Cross-Reference Search
2SD718 Datasheet (PDF)
0.1. 2sd718.pdf Size:106K _utc
UTC 2SD718 NPN EPITAXIAL SILICON TRANSISTOR HIGH POWER AMPLIFIER APPLICATION FEATURES *Recommended for 45~50W Audio Frequency *Amplifier Output Stage. *Complementary to 2SB688. 1TO-3P 1: BASE 2:COLLECTOR 3: EMITTER ABSOLUTE MAXIMUM RATINGS (Ta=25) PARAMETER SYMBOL RATINGS UNITCollector-Base Voltage VCBO 120 VCollector-Emitter Voltage VCEO 120 VEmitter-Base Voltage
0.2. 2sd718.pdf Size:118K _mospec
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0.3. 2sd718 to3p.pdf Size:252K _first_silicon
SEMICONDUCTOR2SD718TECHNICAL DATANPN EPITAXIAL SILICON TRANSISTORHIGH POWER AMPLIFIER APPLICATIONFEATURES *Recommended for 45~50W Audio Frequency Amplifier Output Stage. *Complementary to 2SB688. 1TO-3P 1: BASE 2:COLLECTOR 3: EMITTER ABSOLUTE MAXIMUM RATINGS (Ta=25) PARAMETER SYMBOL RATINGS UNIT Collector- VCBO 120 V Base Voltage Collector- VCEO 120 V Emitte
0.4. 2sd718.pdf Size:218K _inchange_semiconductor
isc Silicon NPN Power Transistor 2SD718DESCRIPTIONCollector-Emitter Breakdown Voltage-: V = 120V(Min)(BR)CEOGood Linearity of hFEComplement to Type 2SB688Minimum Lot-to-Lot variations for robust deviceperformance and reliable operationAPPLICATIONSAudio frequency power amplifier applicationsRecommend for 45-50W audio frequency amplifieroutput stage applicati
Datasheet: 2SD713, 2SD715, 2SD716, 2SD716O, 2SD716R, 2SD717, 2SD717O, 2SD717Y, TIP31C, 2SD718O, 2SD718R, 2SD72, 2SD720, 2SD721, 2SD722, 2SD723, 2SD724.
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I am showing in this video, how to make an ultra bass 100 watts mono class-AB powerful amplifier using d718 b688 & 2n3904 transistors. Combination of d718 b688 powerful amplifier is widely used for high gain. You must use transistor insulation (Mica) to prevent touching heat sink to avoid short circuit because both transistor are using opposite current.
I have chosen this circuit with very few components which is quite easy to assemble for beginners and students. I strongly recommend to choose large enough and thick heat sink for enough heat dissipation for safety of both transistors. The components list is also provided at the end of this article which is easy to find in the local market.
Circuit Diagram
Following is the Circuit Diagram of D718 B688 Powerful Amplifier with Volume Bass and Treble.
Development Images
of D718 B688 Powerful Amplifier DIY
Step # 1
Tighten D718 & B688 transistors on to the heat sink with proper insulation (MICA). Be sure the back plate of both the transistors should not be touched with heat sink. Join plus & minus sides of the two diodes 1N4007 together. Solder one positive end of right diode with Base Pin.1 of right transistor B688. And other negative of left diode with Base Pin.1 of left transistor D718. Connect two 0.33 ohms/5w resistors to Emitters Pin.3 of both transistors. Join the other ends of both transistors together.
Step # 2
Solder the Collector of 2N3904 Transistor to the Bass of B688 and Emitter of 2N3904 Transistor to Collector of B688. Also solder a 100k resistor to the base of 2N3904 Transistor and the center joint of 0.33 ohms/5w resistor.
Step # 3
Connect negative side of 4.7uf capacitor to the base of 2N3904 Transistor.
Step # 4
Solder negative end of 2200uf/50v capacitor to the center joint of two 0.33 ohms resisters. Also solder 1k resister’s one end to the base of D718 and the other end to the positive side of 2200uf/50v capacitor.
Step # 5
I did not show the working of bass-treble circuit here. For more detail to see bass-treble [Click Here]. Connect the positive pin of 4.7uf capacitor to Center Pin.2 of volume control.
Step # 6
Take one 0.47 ohms/5w resister and also take 0.6mm copper enameled wire. Wrap the around the resister 12 times and solder both ends with both ends of resister.
Mosfet D718
Step # 7
Transistor Mosfet D718
Now solder one end of resister coil to the collector Pin.2 of D718 transistor. Attach red positive wire of power supply to center pin Collector of D718 transistor and black negative wire of power supply to center pin Collector of B688 transistor.
Step # 8
Its time to attach 3.5mm mobile jack. Solder the both left & right audio output wires to Pin.1 of Bass Controller and ground wire to Pin.3 of volume controller. Also Join Pin.3 of Volume Controller Collector, center pin of B688 transistor which is ground.
D718 Transistor Mosfet
Step # 9
Connect Speaker’s positive to the resister coil’s empty end. Speaker’s negative will go to ground.
Connect the jack pin to mobile. Turn the power supply On, play music with mobile and Enjoy. Thank you so much for visiting this site.
List of Components
used in D718 B688 Powerful Amplifier
- D718 Transistor x 1
- B688 Transistor x 1
- 2N3904 Transistor x 1
- 1N4007 Diode x 2
- 2200uf Capacitor x 1
- 4.7uf Capacitor x 1
- 104 Capacitor x 4
- 0.33 Ohms Resistor x 2
- 1k Ohms Resistor x 3
- 2.2k Ohms Resistor x 2
- 100k Resistor x 1
- 50 Potentiometer x 3
- Heat Sink x 1
- Power Supply Socket (Optional)
- 3.5mm Mobile Jack (Optional)
- Power Supply 12v
- Speaker 4 Ohms
Harga Mosfet D718
D718 Mosfet Price
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