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RTT054991FTP是台湾旺诠(RALEC)推出的一款0805封装厚膜贴片电阻,针对中高精度小功率电路场景设计,兼顾性能稳定性与成本可控性,广泛适配消费电子、工业控制、汽车电子等领域的通用需求。
该电阻属于旺诠常规贴片电阻系列,以厚膜工艺为核心制造技术,重点满足对阻值精度(±1%)、温度稳定性(±100ppm/℃)及宽温适应性(-55℃~+155℃)有要求的小信号电路。其封装尺寸符合0805国际标准,适配自动化贴装产线,适合批量生产应用。
标称阻值为4.99kΩ,精度等级±1%,属于中高精度电阻范畴。该精度可满足大多数模拟电路的分压、限流需求(如运算放大器的反馈网络、ADC参考电压分压),无需额外校准即可实现基础功能的稳定输出。
温度系数为**±100ppm/℃**,含义为:当环境温度每变化1℃时,阻值变化量为标称值的百万分之一百。以4.99kΩ为例,温度从25℃升至125℃(变化100℃),阻值变化约±0.499Ω,稳定性满足工业级电路的宽温要求。
采用0805封装(国际标准尺寸:2.0mm×1.2mm×0.5mm),体积小巧,适合便携设备(如智能手机、智能手环)的高密度PCB布局,同时兼容常规贴装设备的生产效率。
厚膜电阻通过丝网印刷、烧结等工艺制造,相比薄膜电阻成本更低,且具有较好的抗机械应力能力;相比碳膜电阻,温度稳定性与功率承载能力更优,属于“性能-成本”均衡的主流工艺选择。
工作温度覆盖**-55℃+155℃**,超出常规商业级(0℃70℃)与工业级(-40℃~125℃)标准,可适配高温环境(如汽车发动机舱、工业烤箱附近电路)或低温环境(如北方户外设备)。
产品通过旺诠标准可靠性测试:
旺诠(RALEC)是全球知名被动元件制造商,产品符合RoHS 2.0、REACH等环保法规,通过ISO 9001质量管理体系认证,批次一致性好(阻值偏差控制在±0.5%以内,远优于标称精度),适合量产场景的稳定供应。
该电阻以均衡的性能与成本优势,成为中高精度小功率电路的常用选择,可满足多数通用电子设备的设计需求。
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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.
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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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