WMSIC Electronic Components

VISHAY WSL20101L000FEA18

ModelWSL20101L000FEA18
Package2010
BrandVISHAY
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

17 specifications

Core information

Product name
VISHAY WSL20101L000FEA18
Type
VISHAY
Minimum package
4000

Technical parameters

Power
1W
Electronic Component
VISHAY
Electronic Component
WSL20101L000FEA18
Electronic Component
1
Package
2010
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.15g
Electronic Component
1mΩ
Electronic Component
1
Electronic Component
BM0246758783
Operating Temperature
65℃~+170℃
Electronic Component
±275ppm/℃
Electronic Component
4000

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

WSL20101L000FEA18 产品概述

一、产品简介

WSL20101L000FEA18 属于 VISHAY WSL 系列 Power Metal Strip® 低阻值片式电阻器,标称阻值 0.001 Ω,精度 ±1%,温度系数 ±275 ppm/°C,工作温度范围 -65℃ 至 +170℃,封装为 2010 SMT。该系列以低阻值、低电感和稳定的热性能为特点,适用于高电流检测与阻流抑制场合。

二、主要电性能

  • 阻值:1 mΩ,适合作电流检测分流器(shunt)使用,电压采样信号较小但线性。
  • 精度:±1%,在室温下可满足多数精密电流测量需求。
  • 温度系数:±275 ppm/℃,在温度变化较大时阻值会随之变化(例如温差 100℃ 时阻值变化约 2.75%),需要在系统中做温度补偿或校准。
  • 额定功率:您提供参数中标注 1 W;描述处提到 0.5 W。请以最终选型时厂方数据表和 PCB 散热条件为准。按理论计算:1 W 对应连续电流约 31.6 A(I = sqrt(P/R)),0.5 W 对应约 22.4 A。

三、热性能与功率计算示例

  • 常用计算:P = I^2·R,V = I·R。举例:当 I = 50 A 时,电压降 V = 50 A × 0.001 Ω = 50 mV,功耗 P = 2.5 W(显著超过 0.5–1 W 额定,需外部散热处理或选更大封装)。
  • 热降额:工作环境温度、PCB 铜箔面积和周围空气流动对额定功率影响很大,建议查阅厂方 PCB 热阻曲线并进行实际热仿真或测量。

四、典型应用场景

  • 开关电源、DC-DC 转换器的输入/输出电流检测
  • 电池管理系统(BMS)与充放电电流监控
  • 电机驱动与功率放大器的电流保护与限流
  • 伺服与工业控制系统的精确电流检测

五、选型与 PCB 布局建议

  • 布线:尽量缩短电流路径、使用宽铜线并加厚铜以降低额外寄生电阻与散热瓶颈。
  • 测量采样:若追求高精度,建议采用四线(Kelvin)测量在 PCB 上实现隔离采样点,避免接触电阻影响。
  • 热管理:在电阻两侧及底部提供大面积铜箔和必要的热沉或过孔,以提高功率承载能力并减小温升。
  • EMI/电感:Power Metal Strip® 结构本身低电感,适合快速瞬态测量,但仍需考虑走线环路面积以控制共模噪声。

六、焊接与可靠性注意事项

  • 焊接兼容常见回流工艺,但请遵循厂方推荐的回流曲线以避免材料应力或热疲劳。
  • 工作温度范围宽(-65℃ 至 +170℃),适合大多数工业和一些高温场合;是否满足汽车级(AEC-Q)或其它特定认证,请以厂家认证资料为准。
  • 长期漂移与老化:尽管金属带型结构稳定,但在高温高应力循环下阻值随时间可能有微小漂移,关键计量场合建议做长期可靠性验证。

七、总结

WSL20101L000FEA18 是一款面向高电流检测的低阻值 SMT 分流器,具有 1 mΩ 低阻、±1% 精度与 ±275 ppm/℃ 的温度系数,适用于电源、BMS、驱动等需要精确电流采样的场合。选型时请重点关注厂方数据表中的额定功率与 PCB 散热条件,并结合实际工作电流与温升做热降额与布局优化,以保证测量精度与长期可靠性。

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