WMSIC Electronic Components

FH RC-02K4990FT

ModelRC-02K4990FT
Package0402
BrandFH
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
FH RC-02K4990FT
Type
FH
Minimum package
10000 圆盘

Technical parameters

Power
62.5mW
Electronic Component
Electronic Component
Electronic Component
FH
Electronic Component
RC-02K4990FT
Electronic Component
1
Package
0402
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.022g
Electronic Component
499Ω
Electronic Component
10
Electronic Component
BM0263547943
Operating Temperature
55℃~+155℃
Operating Voltage
50V
Electronic Component
±100ppm/℃
Resistor Type
Resistor

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

RC-02K4990FT 厚膜贴片电阻产品概述

RC-02K4990FT是风华FH品牌推出的0402封装厚膜贴片电阻,以精准阻值控制、宽温适应性及高性价比为核心优势,广泛应用于消费电子、工业控制、汽车电子等领域。以下从产品属性、核心参数、特性及应用等方面展开详细介绍:

一、产品基本属性定位

RC-02K4990FT属于厚膜贴片电阻范畴,型号命名逻辑清晰:

  • "RC"代表风华厚膜电阻系列;
  • "02"对应封装代码(0402英制);
  • "K"表示精度等级(±1%);
  • "4990"为阻值编码(499Ω,前三位有效数字+倍率0);
  • "FT"是品牌工艺标识。

该产品定位为通用型小型化电阻,兼顾成本与性能,适合对阻值精度、功率要求中等,同时需高密度PCB布局的场景。

二、核心电气参数详解

电气参数是电路设计的关键依据,RC-02K4990FT的核心参数如下:

1. 阻值与精度

阻值为499Ω,精度等级**±1%**,实际阻值范围在494.01Ω~503.99Ω之间。此精度可满足多数信号调理、分压、限流电路的一致性需求,无需额外校准即可保证电路性能稳定(如音频前置放大的偏置电阻、传感器信号的分压采样)。

2. 功率与电压限制

  • 额定功率:62.5mW(1/16W):匹配0402封装厚膜电阻的典型功率,实际使用需遵循80%降额原则(最大连续功率≤50mW),避免过热导致阻值漂移或失效;
  • 最大工作电压:50V:连续工作电压上限,若电路电压超过此值,可能引发电阻击穿、绝缘下降,需结合串联保护设计确保安全。

3. 温度系数(TCR)

温度系数为**±100ppm/℃**,表示温度每变化1℃,阻值变化±100×10⁻⁶。以25℃为基准,温度升至125℃(变化100℃)时,阻值漂移约±0.05Ω,宽温稳定性满足工业/车载高温场景需求。

三、封装与工艺特性

1. 0402封装尺寸

采用0402英制封装(公制1005,尺寸1.0mm×0.5mm),是小型化贴片电阻的主流选择,优势在于:

  • 适配高密度PCB设计(如智能手机主板、可穿戴设备模块),有效缩小电路体积;
  • 焊接工艺成熟(回流焊/波峰焊均可),需控制回流焊峰值温度≤245℃,避免封装变形或虚焊。

2. 厚膜工艺优势

通过丝网印刷电阻浆料+高温烧结工艺制造,相比薄膜电阻:

  • 成本更低,适合批量生产;
  • 抗过载能力较强(短时间过功率不易失效);
  • 阻值范围宽(几Ω至几MΩ),覆盖多数应用场景。

四、环境适应性表现

RC-02K4990FT的环境适应性满足工业级及部分车载级要求:

  • 工作温度范围:-55℃~+155℃:覆盖低温(北方户外设备)、高温(汽车发动机舱、工业烤箱模块)场景,远高于商业级电阻(0℃~70℃);
  • 耐环境性能:符合IEC 60068-2环境试验标准,抗95%RH湿度、抗20~2000Hz/2g振动,适合户外、工业现场等复杂环境;
  • 长期可靠性:额定条件下寿命≥10万小时,降额(功率50%)后延长至20万小时。

五、典型应用场景

结合参数与特性,RC-02K4990FT的主要应用场景包括:

  1. 消费电子:智能手机音频调理、可穿戴设备(手环/手表)心率传感器接口;
  2. 工业控制:小型PLC输入输出模块、PT100温度传感器分压采样;
  3. 汽车电子:车载仪表盘背光控制、胎压传感器信号偏置;
  4. 通信设备:小型路由器信号滤波、电源模块电压反馈。

六、品牌与质量保障

RC-02K4990FT由风华FH(风华高科) 生产,风华高科是国内领先电子元器件制造商,厚膜电阻产能位居行业前列,产品通过ISO 9001、ISO/TS 16949(汽车电子)认证,批量一致性好,满足客户量产需求。

综上,RC-02K4990FT厚膜贴片电阻以小型化、高精度、宽温稳定及高性价比,成为电子设计中替代插件电阻的理想选择,可有效提升电路集成度与可靠性。

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