WMSIC Electronic Components

ERJ2RKF2490X

ModelERJ2RKF2490X
Package0402
BrandPANASONIC
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
PANASONIC ERJ2RKF2490X
Type
PANASONIC
Minimum package
10000 圆盘

Technical parameters

Power
100mW
Electronic Component
Electronic Component
Electronic Component
PANASONIC
Electronic Component
ERJ2RKF2490X
Electronic Component
1
Package
0402
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.011g
Electronic Component
249Ω
Electronic Component
1
Electronic Component
BM0264567825
Operating Temperature
55℃~+155℃
Electronic Component
±100ppm/℃
Resistor Type
Resistor
Electronic Component
Electronic Component

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

ERJ2RKF2490X 产品概述

ERJ2RKF2490X是松下(PANASONIC)推出的0402封装厚膜贴片电阻,针对中小功率、高密度PCB设计场景优化,凭借稳定的电气性能和宽温适应性,广泛应用于消费电子、工业控制等领域。以下从核心参数、技术特性、应用场景等维度展开说明:

一、核心参数规格

ERJ2RKF2490X的关键电气与物理参数如下(符合松下官方标准):

参数项 规格值 说明 电阻类型 厚膜贴片电阻 厚膜工艺兼顾成本与稳定性 阻值 249Ω 常规精密阻值(后两位编码为0,即249×10⁰) 精度 ±1% 满足一般工业级精度需求 额定功率 100mW(@70℃) 0402封装常规功率等级 温度系数(TCR) ±100ppm/℃ 温度变化对阻值的影响 工作温度范围 -55℃ ~ +155℃ 宽温适应性覆盖严苛场景 封装尺寸 0402(英制:0.04×0.02英寸;公制:1005) 超小封装适合高密度布局 环保认证 RoHS、REACH合规 符合全球环保要求

二、技术特性解析

1. 电气性能稳定

  • 精度与温度系数平衡:±1%精度可满足多数信号调理、分压电路的线性要求;±100ppm/℃的TCR意味着当环境温度变化100℃时,阻值变化仅±1%,避免因温度波动导致电路性能漂移(例如车载环境中,温度变化范围大时仍能保持稳定输出)。
  • 功率与封装匹配:100mW额定功率适配0402封装的散热能力,在小信号电路(如单片机I/O口限流、运放反馈)中无需额外降额即可长期可靠工作。

2. 环境适应性强

  • 宽温范围:-55℃~+155℃的工作温度覆盖工业现场(户外传感器)、汽车电子(发动机舱周边电路)等严苛场景,无需额外散热设计。
  • 厚膜工艺优势:采用丝网印刷+烧结工艺,相比薄膜电阻成本更低,同时具备抗机械应力、耐潮湿特点,适合批量生产与恶劣环境应用。

3. 高密度布局适配

0402封装体积仅1.0mm×0.5mm,可显著减少PCB占用面积,适合智能手机、智能穿戴等空间要求极高的产品,支持回流焊、波峰焊等常规贴片工艺,兼容性强。

三、典型应用场景

1. 消费电子领域

  • 移动终端:手机主板音频放大电路反馈电阻、屏幕触摸IC分压电阻,利用小封装实现高密度布局;
  • 智能穿戴:智能手表心率传感器接口限流电阻,1%精度保证信号采集准确性。

2. 工业控制领域

  • 传感器接口:温度/压力传感器信号调理电路(电桥平衡电阻),宽温范围适应工业现场昼夜温差;
  • PLC模块:数字量I/O口限流电阻,稳定阻值避免误触发。

3. 汽车电子领域

  • 车载小功率电路:仪表盘背光控制分压电阻、车身控制器(BCM)信号电阻,符合汽车级宽温要求(部分批次支持AEC-Q200认证)。

4. 通信设备领域

  • 射频前端匹配:小型无线路由器WiFi模块匹配网络电阻,0402封装适配高密度射频PCB设计。

四、松下品牌优势

ERJ2RKF系列作为松下成熟产品线,具备以下核心优势:

  1. 品质一致性:严格工艺管控确保每颗电阻阻值、TCR偏差均在规格内,批量一致性优于行业平均;
  2. 可靠性验证:通过振动、冲击、高温老化等测试,符合IEC、JIS国际标准;
  3. 供应稳定性:全球生产布局(日本、中国等工厂)保证长期稳定供货,避免缺货影响项目;
  4. 技术支持:提供完整选型手册、焊接工艺指南,助力客户快速集成。

五、选型与使用注意事项

  1. 功率降额建议:长期工作实际功率不超过额定功率的50%(50mW),避免热积累导致阻值漂移;
  2. 焊接工艺要求:回流焊峰值温度260℃±5℃,时间不超过10秒(符合IPC-J-STD-020标准),避免过温损坏;
  3. 存储条件:未开封产品存储于1535℃、湿度4060%环境,开封后1个月内使用完毕(防受潮影响焊接);
  4. 精度匹配:若需高于1%精度(如精密测量),需选择更高精度薄膜电阻替代。

综上,ERJ2RKF2490X凭借小封装、宽温适应性、稳定电气性能,成为消费电子、工业控制等领域中小功率精密电阻的优选方案,松下品牌保障进一步提升了可靠性与供应链稳定性。

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