WMSIC Electronic Components

ROQANG KM1H4R7M0405

ModelKM1H4R7M0405
Package4x5mm
BrandROQANG
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
ROQANG KM1H4R7M0405
Type
ROQANG
Minimum package
1000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
ROQANG
Electronic Component
KM1H4R7M0405
Electronic Component
1
Electronic Component
4.7uF
Package
4x5mm
Electronic Component
Through-hole Aluminum Electrolytic Capacitor
Electronic Component
±20%
Electronic Component
0.213g
Electronic Component
1
Electronic Component
BM0265608350
Electronic Component
2000hrs@105℃
Operating Temperature
40℃~+105℃
Current
16mA@120kHz
Voltage
50V
Capacitor
4mm

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

KM1H4R7M0405 径向引线铝电解电容产品概述

一、产品核心身份与定位

KM1H4R7M0405是ROQANG(容强)品牌推出的通用型径向引线铝电解电容,针对紧凑空间设计,兼顾电气性能与可靠性,适用于多数对体积敏感、需稳定滤波/耦合的电子电路。作为小型化电解电容的代表型号,其在50V耐压等级下实现了4mm×5mm的紧凑封装,平衡了容值、耐压与安装灵活性,是消费电子、工业控制等领域的常用选型。

二、关键电气参数解析

该电容的核心电气指标明确了其应用边界,具体解析如下:

  • 容值与精度:标称容值4.7μF,精度±20%,满足通用电路对容值稳定性的基本需求(如电源滤波、音频耦合无需高精度场景);
  • 额定电压:50V直流额定电压,是长期可靠工作的最大电压限值,实际使用需确保工作电压不超过该值(建议留20%以上余量);
  • 纹波电流能力:120kHz频率下可承受16mA纹波电流,这是开关电源滤波的关键参数——若纹波电流超过该值,电容会因焦耳热加速老化,16mA的能力可覆盖多数小型开关电源的输出纹波需求;
  • 温度特性:工作温度范围-40℃~+105℃,容值随温度变化符合铝电解电容的常规规律(低温下容值略有下降,高温下稳定),宽温范围适配高低温环境。

三、结构封装与物理特性

  • 封装形式:径向引线封装,引线从电容体两端垂直引出,适合插件式PCB安装,与轴向引线相比,径向封装更节省PCB布局空间;
  • 物理尺寸:电容体直径4mm,长度5mm(不含引线),属于小型化封装,可适配0805等贴片元件的周边布局,满足紧凑设计要求;
  • 结构特点:采用铝电解电容常规结构(阳极铝箔、阴极铝箔、电解液、隔膜),小型化设计下通过优化箔材与电解液配方,确保容值与耐压的可靠性,避免因体积缩小导致的性能衰减。

四、可靠性与环境适应性

  • 工作寿命:2000小时@105℃,即105℃高温环境下连续工作2000小时后,容值变化率仍在允许范围内(一般≤±20%),漏电流符合标准;需注意的是,电解电容寿命随温度降低呈指数级延长(如60℃下寿命约为105℃的10倍,25℃下约为50倍),可根据实际工作温度调整选型余量;
  • 环境耐受:除宽温范围外,该电容可耐受常规湿度环境(无特殊防潮涂层,适合室内/常规工业环境),避免长期暴露在高湿度、腐蚀性气体中(如海边、化工车间需考虑防护);
  • 耐纹波稳定性:16mA@120kHz的纹波能力经过测试验证,可确保在高频开关电路中稳定工作,不会因过热导致电解液干涸、容值下降。

五、典型应用场景

结合参数与特性,KM1H4R7M0405的典型应用包括:

  1. 小型开关电源:如手机充电器、LED驱动电源的输出滤波,50V耐压适配中低功率电源,小体积适合紧凑外壳;
  2. 消费电子:机顶盒、路由器、智能音箱的辅助电源滤波,宽温范围适配家庭环境的温度变化;
  3. 工业控制:小型传感器模块、PLC的电源电路,-40℃低温适配北方户外或低温车间环境;
  4. 汽车电子边缘场景:车载USB充电器、行车记录仪的电源滤波(需确认实际工作温度是否在105℃以内);
  5. 音频电路:简易音频放大器的耦合电容,4.7μF容值适合中低频信号耦合。

六、选型与使用注意事项

为确保长期可靠工作,需注意以下几点:

  • 耐压降额:实际工作电压建议不超过40V(额定电压的80%),避免电压波动导致过压;
  • 纹波电流控制:若电路纹波电流超过16mA@120kHz,需并联同规格电容(如2个并联可将纹波能力提升至32mA);
  • 极性安装:铝电解电容有正负极(引线较长者为正极),反接会导致漏电流剧增、电容失效甚至爆炸;
  • 焊接规范:焊接温度不超过260℃,单个引脚焊接时间不超过10秒,避免高温损坏电解液;
  • 环境防护:长期暴露在高湿度(>85%RH)或腐蚀性环境中,需增加防护措施(如涂覆三防漆)。

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