Persamaan Transistor D998: B778
adalah informasi krusial bagi teknisi elektronika, terutama saat memperbaiki power amplifier audio atau power supply yang rusak. Transistor KTD998 (NPN) dan KTB778 (PNP) merupakan sepasang transistor final bipolar (BJT) yang bekerja secara komplementer dalam sirkuit push-pull amplifier. Ketika komponen asli sulit ditemukan di toko komponen lokal seperti Shopee Indonesia, Anda harus mencari komponen pengganti dengan spesifikasi elektrik dan konfigurasi pin yang setara agar performa audio tetap jernih dan bertenaga.
Karena Vceo hanya 120V, transistor ini sebenarnya dikategorikan sebagai transistor tegangan menengah, bukan tegangan tinggi. Ini penting karena jika Anda menggantinya dengan transistor tegangan terlalu tinggi (misal 250V) tanpa penyesuaian bias, suara bisa menjadi kasar.
These values determine the performance of the transistor in a circuit. Persamaan Transistor D998 B778
The D998 and B778 function as a "push-pull" pair, where the NPN (D998) handles the positive half of the signal cycle and the PNP (B778) manages the negative half. This configuration is essential for Class AB amplifiers, as it balances current flow and significantly reduces harmonic distortion. Key shared specifications include:
Common failure causes in amplifiers:
For audio quality, buy matched pairs or measure hFE. Original parts had hFE range 40–140. Modern equivalents (e.g., 2SC5200) are typically 55–160. Close matching between NPN and PNP reduces distortion.
): 80 Watt hingga 100 Watt (tergantung varian kemasan dan produsen seperti KEC) Penguatan Arus DC ( hFEh sub cap F cap E end-sub The D998 and B778 function as a "push-pull"
High Power Amplifier (Cocok untuk amplifier 45-50W ke atas). 2. Persamaan Transistor D998 B778 (Substitusi)
For any medium-to-high power analog application requiring ±140V and 15A, the D998/B778—or its modern equivalent—remains a solid engineering choice. buy matched pairs or measure hFE.
For full original Sanken datasheet (in Japanese/English), search: or download from archive sites like alldatasheet.com.
Saat mengganti transistor final amplifier, ikuti aturan praktis berikut: D998 datasheet PDF – Power Transistors | Savantic
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