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.
KDZVTFTR4.3B 是 ROHM(罗姆)品牌的一款独立式稳压二极管,标称稳压值 4.3V,稳压范围 4.3V~4.8V,最大耗散功率 Pd = 1W,反向漏电流 Ir = 20μA @1V。该器件采用 SOD-123FL 表面贴装封装,适合体积受限的稳压、基准与钳位应用。
按 Pd=1W 与 Vz≈4.3V 简单计算,器件理论最大稳压电流约为 232mA(Iz = Pd/Vz)。实际应用中应避免长期在该极限功率点工作,建议在稳压基准场合采用数 mA 的偏置电流以取得更稳定的电压,若用于功率稳压应参考厂方数据表的温度与功率折减曲线进行设计。
SOD-123FL 提供紧凑的占板面积,但热阻相对较高。为了保证可靠性与长期稳定性,应在 PCB 设计中为该器件留出适当铜箔散热区域或过孔,缩短走线并避免热源邻近。高温环境或连续大电流工作时需要参考厂方的功率折减规范。
总结:KDZVTFTR4.3B 以其 4.3V 标称电压、1W 功率和 SOD-123FL 小封装,适合各种中低功率稳压、基准和钳位应用。设计时重视热管理与工作电流选择,可在体积受限系统中提供可靠的电压稳定功能。
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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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