Persamaan Transistor D998 B778 _verified_ (2025)
D998 (2SD998)
The and B778 (2SB778) are a popular pair of complementary silicon power transistors, often found in the output stages of audio amplifiers and car audio systems. Key Specifications
- Short-circuit output (speaker wire shorted) → Exceeds IC peak of 25A → secondary breakdown.
- Overheating due to insufficient heatsink or failed bias circuit → Thermal runaway.
- Overvoltage on supply rails (>±70V unloaded) → Exceeds VCEO of 140V.
- Type: NPN Silicon Epitaxial Planar
- Application: Power Amplifier, Switching
- Collector-Base Voltage ($V_CBO$): 200 V
- Collector-Emitter Voltage ($V_CEO$): 150 V
- Emitter-Base Voltage ($V_EBO$): 6 V
- Collector Current ($I_C$): 15 A
- Power Dissipation ($P_C$): 150 W
- DC Current Gain ($h_FE$): 40 to 100 (typically grouped in ranks)
2SD718 (NPN) & 2SB688 (PNP)
(Sangat populer dan mudah ditemukan) 2SD1047 (NPN) & 2SB817 (PNP) Persamaan Transistor D998 B778
Gunakan Sepasang:
Jika mengganti transistor di blok audio, sangat disarankan untuk mengganti keduanya (NPN dan PNP) dengan tipe persamaan yang sama agar karakter suaranya tetap seimbang. D998 (2SD998) The and B778 (2SB778) are a