WMSIC Electronic Components

Vishay MMB02070C3308FB200 Resistor MMB02070C3308FB200

ModelMMB02070C3308FB200
PackageMELF-0207
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
VISHAY MMB02070C3308FB200
Type
MELF-0207
Minimum package
2000 圆盘

Technical parameters

Power
1W
Electronic Component
Electronic Component
Electronic Component
VISHAY
Electronic Component
MMB02070C3308FB200
Electronic Component
1
Package
MELF-0207
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.13g
Electronic Component
3.3Ω
Electronic Component
1
Electronic Component
BM0230042031
Operating Temperature
55℃~+155℃
Operating Voltage
350V
Electronic Component
±50ppm/℃
Resistor Type
Resistor

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

MMB02070C3308FB200 产品概述

一、概述

MMB02070C3308FB200 是 VISHAY(威世)系列的贴片薄膜电阻,采用 MELF-0207 圆柱型封装,额定功率 1W,阻值 3.3Ω,精度 ±1%,温度系数(TCR)±50 ppm/℃,额定工作电压 350V,工作温度范围 -55℃~+155℃。该器件以薄膜工艺实现优良的长期稳定性和低噪声特性,适合需要精确阻值与温度稳定性的应用。

二、主要特性

  • 阻值:3.3Ω,公差 ±1%(精密级别)
  • 额定功率:1W(需按环境温度与散热情况正确降额使用)
  • 温度系数:±50 ppm/℃,保证在温度变化时阻值漂移小
  • 工作温度:-55℃ 至 +155℃,适用于宽温区工作环境
  • 封装:MELF-0207(管状/圆柱形贴片),便于自动化贴装
  • 工艺:薄膜电阻,具备低噪声与优良的长期稳定性

三、电气与热特性(实用提示)

  • 在额定功率 1W 条件下的最大允许电流 Imax = sqrt(P/R) ≈ 0.55 A;对应最大端电压 V = Imax × R ≈ 1.82 V。因此在实际电路中,功率限制比标称“工作电压 350V”更能约束使用条件。
  • “工作电压 350V”为器件允许的最高直流电压等级,但并不意味着可在此电压下仍保持 1W 功耗;高电压下会导致极高功耗并损坏器件。
  • 环境温度升高时应对功率进行降额处理,并通过 PCB 铜厚、散热面设计或强制风冷改善散热条件。

四、典型应用

  • 精密电阻分压、参考网络和高稳定性电阻阵列
  • 测量与传感前端(需注意功率与电压匹配)
  • 精密模拟电路、仪表放大器的偏置和增益设定
  • 需要低噪声、长期漂移小的工业与医疗电子设备

五、安装与使用建议

  • MELF 封装表面圆滑,贴片时易滚动,建议在贴装前使用点胶固定或在回流过程中采用夹具定位。
  • 遵循制造商推荐的回流/波峰焊工艺参数,避免过高的焊接温度和过长的热历史以防性能退化(详细焊接曲线请参阅 VISHAY 数据手册)。
  • 设计 PCB 时提供足够的铜面积作为散热片,并避免在高温区附近聚集热源。
  • 选择电阻时同时核算阻值、功率、允许电压与环境温度,避免在高电压低阻值场景下误用导致过功耗。

六、可靠性与品质保障

VISHAY 作为知名元件厂商,其薄膜 MELF 电阻通过严格的温度循环、潮湿、高加速寿命测试(HALT/HASS)等品质验证,具有良好的可追溯性和批次一致性。建议在关键设计中索取并参照官方器件规格书和可靠性报告。

总结:MMB02070C3308FB200 以其高稳定性、低 TCR 和窄公差,适合要求精度与长期稳定性的应用。选型时请综合考虑功率与电压限制并按厂家推荐工艺安装,以确保长期可靠工作。

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