Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
Available for RFQ
Technical data
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LR2512-21R100F4是台湾旺诠(RALEC)针对精准电流检测、稳定功率耗散场景设计的低阻值贴片功率电阻。其核心价值在于:在2512小型贴片封装下,平衡了100mΩ毫欧级低阻、±1%高精度与1W功率容量,同时通过低温度系数保障宽温区性能稳定,适配自动化生产与严苛应用环境,是工业控制、电源管理、电池系统等领域的实用型器件。
阻值为100mΩ(0.1Ω),属于低阻范畴——电流采样场景中,低阻可降低电压降(I×0.1Ω)对电路效率的影响;±1%的精度优于常规功率电阻(±5%),能有效减少电流检测误差,满足工业级与消费电子的精准需求(如5A电流时,检测误差仅±50mA)。
封装2512(英制尺寸:6.4mm×3.2mm)下实现1W功率容量,功率密度约4.9W/cm²(封装面积≈0.205cm²),适配中低功率电路的持续耗散需求,可承受电机启动、电源瞬态等脉冲功率场景。
**±25ppm/℃**的温度系数,意味着环境温度每变化1℃,阻值仅变化0.0025%;以工业级常规温度范围(-55℃至125℃)计算,总阻值变化最大为0.45%(180℃×25ppm),远低于±1%的精度要求,保障宽温下电流检测与功率输出的一致性。
采用2512英制贴片封装,对应公制尺寸6.4mm(长)×3.2mm(宽)×0.55mm(厚,典型值),符合IPC标准,适配自动化贴片机(SMT)生产,支持回流焊、波峰焊工艺(需遵循旺诠推荐的焊接温度曲线)。
DC-DC转换器、开关电源等电路中,用于输出电流采样:低阻(100mΩ)可降低电压降对电源效率的影响,±1%精度保证电流反馈的准确性,助力电源稳压与过流保护。
新能源汽车、储能电池的BMS中,用于充放电电流检测:宽温稳定性(-55~125℃)适配车载极端环境,低阻减少电池能量损耗,高精度保障SOC(荷电状态)计算的准确性。
工业伺服电机、消费电子电机的驱动电路中,用于过流保护采样:1W功率容量可承受电机启动瞬间的脉冲功率,低阻不影响电机驱动效率,精准采样避免误保护或欠保护。
手机、笔记本快充适配器中,用于输出电流检测:适配快充大电流(如5A时电压降0.5V),低温度系数保障不同环境温度下的充电功率稳定,符合快充协议的精准度要求。
RALEC(旺诠)是台湾专业电阻制造商,拥有30+年研发生产经验,产品符合RoHS 2.0、REACH等环保标准,通过ISO 9001质量管理体系认证。LR2512系列采用合金膜工艺(低阻常用),电阻膜均匀性好,产品一致性达AEC-Q200(车规级)标准(部分型号),可靠性与寿命满足工业级与车规级应用需求。
该产品凭借“低阻+高精度+宽温稳定”的特性,成为电流检测与功率耗散场景的高性价比选择,适配多领域电路设计需求。
Request for quote
Use the form for single models, category sourcing, and multi-line BOM requirements.
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.
Related products