The original TO-3P (also called TO-247 or TO-3PL) has the same pinout as modern TO-247/TO-264. Pinout: B-C-E (left to right when facing flat side with pins down). Most equivalents match this.
Understanding why replacements are needed helps in selecting the right part: Persamaan Transistor D998 B778
The are robust audio output transistors, but due to obsolescence, the best persamaan for most applications is the 2SC5200 (NPN) and 2SA1943 (PNP) pair from Toshiba (or equivalent brands like KEC, Fairchild/Onsemi). For higher-voltage or professional amps, use MJL4281A/MJL4302A . Always replace both channels with the same matched pair and verify your amplifier’s rail voltage before substituting. The original TO-3P (also called TO-247 or TO-3PL)
This paper provides a detailed technical overview of the 2SD998 (NPN) and 2SB778 (PNP) transistors. These components are commonly paired in high-fidelity audio amplifier circuits and power management applications. The document outlines their electrical characteristics, compares them with potential substitutes, and discusses critical parameters to consider when attempting to find equivalent components (persamaan) for repair or manufacturing purposes. Understanding why replacements are needed helps in selecting
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user wants a long article about "Persamaan Transistor D998 B778". This is in Indonesian, asking for equivalents or substitutes for the D998 and B778 transistors. These are likely complementary power transistors used in audio amplifiers. I need to provide a comprehensive article covering specifications, equivalent substitutes, manufacturers, and selection guidelines. To get this information, I need to search for the specifications of D998 and B778 transistors and their equivalents. I will perform multiple searches to cover various aspects. search results show some relevant pages. I need to open them to gather detailed information. I will open the datasheet pages for D998 and B778, the forum discussions about equivalents, the pages listing substitutes, and any other relevant results. search results provide specifications, equivalents, and application details. I'll organize the article with an introduction, specifications, equivalents list, selection considerations, application notes, and a conclusion. I'll cite sources appropriately. transistor pair D998 (NPN) and B778 (PNP) is a common complementary set in audio amplifiers, known for its balance of affordability and performance. However, as they are discontinued, finding suitable equivalents is a frequent challenge for those repairing and restoring audio equipment. This guide explores their specifications and the best available substitute options.
Tergantung kualitas substitusinya. 2SC5200 (Toshiba) memiliki gain bandwidth 30MHz, persis sama dengan D998. Bahkan 2SC5242 (ON Semi) memiliki Safe Operating Area (SOA) yang lebih lebar, sehingga lebih tahan korsleting output.