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RALEC旺诠LR2512-23R010F4是一款针对中功率电流检测场景设计的高精度贴片电流采样分流器,依托旺诠在电阻制造领域的技术积累,兼顾低阻值、高精度、宽温稳定性与小型化封装,适用于电源管理、电机控制、电池管理等多类电子设备的电流监测与保护回路。
该电阻属于旺诠2512封装系列的电流采样专用型号,核心作用是将电路中的大电流转换为可检测的低电压信号(遵循欧姆定律U=IR),为过流保护、电流调节、功率监测等功能提供精准输入。其设计目标是平衡“低功耗(低阻值)”与“高精度”,适配对电流检测精度要求较高、功率密度适中的中功率电子系统。
持续功率额定值为3W,结合阻值计算,其最大持续工作电流约为17.3A(I=√(P/R)=√(3/0.01)≈17.3A),可覆盖多数中功率设备的电流范围(如65W-200W开关电源、20A以内的电机驱动回路)。
温度系数为**±25ppm/℃**,表示温度每变化1℃,阻值变化±25×10⁻⁶×10mΩ=±0.25μΩ。例如,当环境温度从25℃升至85℃(变化60℃),阻值仅漂移±15μΩ,相对变化率仅0.15%,远低于精度等级,确保宽温(-55℃~125℃,需结合旺诠官方 datasheet 确认)下的采样精度稳定。
采用2512贴片封装(英制尺寸:6.4mm×3.2mm),符合现代电子设备“小型化、高密度组装”的设计趋势,适配自动化贴装工艺(回流焊、波峰焊兼容),可有效提升批量生产效率。封装的机械强度满足工业级应用的振动、冲击要求,适合车载、工业自动化等严苛环境。
该产品凭借上述特性,成为中功率电子系统电流采样场景的高性价比选择,可有效提升电路的电流检测精度与系统可靠性。
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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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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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