| Equivalent Models | | :--- | | , A1941 | | 2SB817 , 2SB688 , B817 , B688 | | 2SA1106 , 2SA1146 , 2SA1186 , 2SA1265 | | 2SA1301 , 2SA1302 , 2SA1303 , 2SA1386 | | 2SA1491 , 2SA1492 , 2SA1516 , 2SA1695 | | 2SA1805 , 2SA1942 , 2SA1986 | | 2SB863 , 2SB1429 , FJA4210 , KTA1943 | | KTB688 , KTB778 , MJW1302A | | NTE37 (Universal Replacement) |
Transistor daya utama yang menangani sinyal positif.
"Ini dia masalahnya," gumam saya.
Before finding an equivalent transistor, it's essential to understand the characteristics of the D998 B778 transistor. Here are some of its key features:
Jika Anda kesulitan menemukan seri D998/B778, Anda bisa menggunakan persamaan berikut yang memiliki karakteristik serupa atau lebih tinggi:
: Common TO-247 package alternatives with 25A current handling. C5198 / A1941 : Closely matched specs (140V, 10A, 100W). Installation Guide
Before looking for a replacement, you need to know what you are matching. The D998 and B778 are typically housed in a or TO-247 package. Type: D998 (NPN) / B778 (PNP) Collector-Emitter Voltage (Vce): 120V Collector Current (Ic): 10A Power Dissipation (Pc): 80W
A very close match often used in the same 45-50W amplifier designs. The D718 is NPN and the B688 is PNP. Go to product viewer dialog for this item. Go to product viewer dialog for this item.
Saya membuka baut cover dengan obeng plus. Pemandangan di dalamnya cukup mengenaskan. Debu tebal menutupi sirkuit, namun fokus saya tertuju pada blok final. Satu transistor power tampak telah "meledak", meninggalkan retakan pada bodi plastik hitamnya. Resistor emitter 0.5 ohm yang menemaninya juga gosong hangus seperti arang.
Karakteristik elektrik utama berdasarkan sasis meliputi: Tegangan Maksimum (Vceo / Vcbo): 120 Volt Arus Kolektor Kontinu (Ic): 10 Amper Disipasi Daya Maksimum (Pd): 80 Watt hingga 100 Watt Penguatan Arus DC (hFE): 55 hingga 160 Frekuensi Transisi (fT): 12 MHz Daftar Persamaan Transistor D998 dan B778
