2SD998 B778 Transistor Pair Guide

The phrase 'd998 b778' refers to a high-power silicon audio transistor pair, specifically the 2SD998 (NPN) and 2SB778 (PNP). These components are primarily used in the output stages of audio power amplifiers, particularly in car audio systems like Jensen amplifiers, to drive high-fidelity speakers Lazada Diyaudio.

Product Insights

* Key Specifications: These transistors support a collector-emitter voltage of 120V and a continuous collector current of 10A, with a power dissipation of 80W Daraz.

* Package Types: They are commonly found in TO-3P or TO-3PF (fully isolated plastic) packages. The plastic versions are preferred for compact designs as they don't require external mica insulation Diyaudio.

* Common Equivalents: Due to sourcing challenges, technicians often upgrade to more robust pairs like the 2SC5200/2SA1943 or FJA4313/FJA4213 for better thermal reliability Diyaudio Daraz.

Market Trends

* Repair Demand: There is a steady "aftermarket" demand driven by hobbyists and repair shops servicing older car amplifiers and high-power audio equipment Nevenmx Youtube.

* B2B Sourcing: Wholesale prices on B2B platforms range from $0.20 to $1.50 per pair, depending on order volume and whether the parts are original or compatible replacements Alibaba Alibaba.

* Supplier Landscape: Sourcing is concentrated in Shenzhen, China, where suppliers offer "BOM Quotation" services, allowing buyers to bundle these with other electronic components for repair kits Alibaba.

I have compiled a list of current wholesale listings for these transistor pairs, including pricing, minimum order quantities (MOQ), and supplier details.

D998 B778

Overview

Product Insights

Market Trends

2sd998 2sb778 Audio Power Transistor

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