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.
LMSZ5254BT1G 为乐山无线电(LRC)出品的独立式稳压二极管,标称稳压值 27V,稳压范围 25.65V~28.35V,最大耗散功率 500mW。器件采用 SOD-123 表贴封装,适用于空间受限的电源基准与过压保护场合。工作结温范围宽 (-55℃ ~ +150℃),可在较严苛环境下长期工作。
稳压二极管在反向工作区通过分流电流维持近似恒定电压。Zzt 表征在规定测试电流下的交流动态阻抗,值越小稳压精度越高;Zzk 反映击穿转折区的阻抗特性,较高的 Zzk 意味着在低电流区电压可能变化较大。Ir 指在低电压时的反向电流,影响小电流应用下的漏电与偏移。
500mW 为器件最大耗散功率,实际使用需考虑环境温度与 PCB 散热条件,建议在高温或连续大电流情形下进行降额使用。SOD-123 为小型表贴封装,热阻相对较高,应通过扩大焊盘、连接散热地或铜箔来改善散热。
选择时注意稳压电流范围与实际电路工作点匹配,避免长期在最高 Pd 下工作;在低电流区要考虑 Zzk 带来的电压漂移;对漏电和温漂敏感的应用,需在电路中增加滤波或温度补偿。若需更高功率或更低动态阻抗,可考虑封装更大或功率更高的型号。
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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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