Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
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Technical data
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
S8550-H 是扬杰(YANGJIE)推出的一款小功率 PNP 双极性晶体管,采用 SOT-23 封装,适用于小信号放大与低压开关驱动。器件在 25V 集电极—发射极击穿电压下,可安全工作于 500mA 的集电极电流范围内,兼顾开关与放大场合的需求。
在工作于线性区时,按标称 hFE=120 估算,当 Ic=500mA 时基极直流电流约为 4.2mA(Ib≈Ic/hFE)。实际驱动或进入饱和时需增加基极电流,建议根据具体开关损耗与响应时间调整驱动比。器件的 fT=150MHz 表明在高频小信号放大或快速开关场合具有良好响应能力。
SOT-23 小外形带来良好的PCB面积利用率,但器件耗散功率仅 300mW,需注意散热设计。推荐在焊盘周围留足铜箔以降低热阻,避免长时间在高功率或高环境温度下工作;必要时采取带散热层的 PCB 布局或并联使用以分散热量。
避免对基极施加超过 VEBO=5V 的反向电压;设计时考虑 Icbo 引起的微小漏电流;在高频或高电流条件下验证实际增益与饱和特性,确保器件在安全工作区内使用。
如需选型与样片,可检索型号 S8550-H(YANGJIE),并结合 PCB 热设计与实际应用场景做进一步验证。
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Product sourcing intelligence
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.
The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
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