The 2SD1047 is also known as D1047 Transistor. In some types only the D1047 labelled. This transistor is a NPN power transistor most common in audio devices. This article describes the D1047 Pinout, equivalent, key specifications and additional information’s for electronic enthusiast and technicians.
What is a D1047 Transistor?
D1047 transistor is a popular NPN transistor and it can handle maximum collector to emitter voltage of 140 V and maximum collector current of 12 A. This transistor is available in TO-3P packaging. The transistor can give power dissipation of up to 100 W.
D1047 Transistor Pinout and Pin Configuration
To check the TO-3P type transistor pinout, you need top hold the transistor numbering facing you and three pins are pointing downward position. Then count the numbers from left to right as first pin is Base, second is collector and third pin is emitter.
| Pin | D1047 (2SD1047) |
|---|---|
| 1 | Base (B) |
| 2 | Collector (C) |
| 3 | Emitter (E) |
| Metal tab | Collector (C) |
Key Specifications
- Collector-Emitter Voltage is 140 V
- Collector-Base Voltage is 160 to 200 V (manufacturer dependent).
- Continuous Collector Current is 12 A (peak pulse handling up to 20 A)
- Total Power Dissipation is 100 W
- Transition Frequency is 15 to 20 MHz
- DC Current Gain is Up to 200
Complementary PNP Pair Transistor
The 2SB817 or B817 is the complementary PNP transistor of 2SD1047 transistor. You can use this complementary pairs in push pull amplifier circuits to get max output watts of 100 W.
Direct Equivalent and Replacement for D1047 Transistor
You can use 2SC2987, 2SC3855, 2SD705 and 2SC5200 as the direct and equivalent transistors. Pin configuration is same and electrical characteristics will be varies
| Transistor | Vceo | IC | Power |
|---|---|---|---|
| 2SD1047 | 140 V | 12 A | 100 W |
| 2SC2987 | 140 V | 12 A | 120 W |
| 2SC3855 | 140 V | 10 A | 100 W |
| 2SD705 | 500 V | 8 A | 80 W |
| 2SC5200 | 230 V | 15 A | 150 W |
D718 vs D1047 Which Transistor is Better for Audio Amplifier
The winner is D1047. The D718 (2SD718) has the collector-emitter voltage of 120 V and maximum collector current of 8A with power output of 80 W. we know that the D1047 has 140 V and 12A current handling capability with max power output of 100 W. From this the winner is D1047 transistor handling high current and high output power. if you are building low power audio amplifiers you can consider D718 transistor.
Applications
- Used in Class AB audio amplifier push pull power stage.
- Home theater systems and DIY audio projects.
- Car audio amplifier system and subwoofer amplifiers.
