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.
MMBT4401是晶导微电子推出的NPN型双极结型晶体管(BJT),采用SOT-23表面贴装封装,兼具小体积、宽温适应性与基础功率性能,适用于消费电子、小型工业控制等领域的小信号放大及低速开关场景。
该器件属于小信号功率型NPN三极管,并非高压/大电流功率管,而是针对中小功率、紧凑布局场景设计。单封装(1个NPN管芯)结构配合SOT-23封装,可直接集成于小型PCB中,降低电路整体体积。晶导微电子作为国内成熟半导体厂商,产品一致性符合工业级基础要求。
各参数明确了器件适用边界,核心意义如下:
采用SOT-23表面贴装封装,尺寸约1.6mm(长)×1.0mm(宽)×0.8mm(高),3引脚标准配置(1脚基极B、2脚发射极E、3脚集电极C)。优势包括:
结合参数特性,典型应用集中于:
工作温度范围**-55℃+150℃**,覆盖工业级(-40℃+85℃)及部分高温场景(如汽车电子辅助模块),极端温度下性能稳定。低截止电流(100nA)确保截止状态低功耗,封装抗振动/冲击能力符合常规电子设备要求。
晶导微电子的MMBT4401经标准化测试,参数一致性良好,可直接替换同规格通用型号。单管封装适合小批量原型开发或大批量量产,成本优势明显,是中小功率场景的经济选择。
总结:MMBT4401是高性价比NPN小信号三极管,凭借小体积、宽温范围与基础功率性能,可满足消费电子、小型工业控制等领域多样化需求。
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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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