Proper installation is critical to prevent thermal runaway and ensure high-fidelity sound.

He turned to the forums, the digital graveyard where old tech wizards congregated. He posted a query: “Need cross-reference for D998 and B778. 80V, 4A, 40W. Driver stage.”

(E) Note: Incorrect pin connection can lead to immediate component failure or circuit malfunction. Installation & Application Guidelines

The and B778 (2SB778) are high-power silicon transistors typically used as a complementary pair in audio amplifier output stages. In this setup, the NPN-type D998 handles the positive half-cycle of the audio signal, while the PNP-type B778 handles the negative half-cycle, a configuration commonly known as a push-pull or Class AB amplifier. Technical Specifications

Hindari membeli D998/B778 murah yang dijual di toko online dengan harga di bawah Rp 15.000. 90% adalah palsu (oblong). Lebih baik beli 2SC5200/2SA1943 dari distributor resmi.

Ketika melakukan perbaikan atau perakitan ulang, sering kali teknisi kesulitan menemukan stok komponen original yang sama persis di pasar lokal. Oleh karena itu, memahami daftar serta tata cara pemasangan ( install ) yang benar sangat krusial untuk mencegah kerusakan fatal akibat malfungsi termal atau ketidakcocokan spesifikasi. Spesifikasi Utama Transistor D998 & B778