WMSIC Electronic Components

KOA RK73H2ATTD1004F

ModelRK73H2ATTD1004F
Package805
BrandKOA
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

20 specifications

Core information

Product name
KOA RK73H2ATTD1004F
Type
KOA
Unit
Electronic Component
Minimum package
5000 圆盘

Technical parameters

Power
250mW
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
KOA
Electronic Component
RK73H2ATTD1004F
Electronic Component
1
Package
805
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.027g
Electronic Component
1MΩ
Electronic Component
1
Electronic Component
BM0265148156
Operating Temperature
55℃~+155℃
Operating Voltage
150V
Electronic Component
±100ppm/℃

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

RK73H2ATTD1004F 厚膜贴片电阻产品概述

一、产品定位与核心身份

RK73H2ATTD1004F是日本KOA公司推出的0805封装厚膜贴片电阻,属于通用型但兼具中高精度与中功率承载能力的元件,主要面向工业控制、汽车电子、通信设备等对阻值精度、功率密度有一定要求的场景。作为KOA厚膜电阻系列的经典型号,其以稳定的电气性能、宽环境适应性为核心竞争力,是替代同类通用电阻的高性价比选择。

二、核心电气性能参数及实际价值

该电阻的关键电气参数明确适配中高端电路需求,具体如下:

  1. 阻值与精度:标称阻值1MΩ(10⁶Ω),精度±1%——远高于±5%的通用电阻,可满足运放反馈网络、ADC基准分压等需要准确阻值匹配的电路,避免因阻值偏差导致的信号失真或控制误差;
  2. 功率承载能力:额定功率250mW(0.25W)——0805封装中属于中等功率(多数同类封装电阻额定功率为100mW),可稳定承受瞬时峰值功率(如电路启动时的浪涌),无需降额使用即可适配常规负载;
  3. 工作电压上限:150V——远超普通0805电阻(通常50V以下),适合高压小电流场景(如电源输出电压监测、高压传感器信号调理),避免因电压超额定值导致的击穿失效;
  4. 温度系数(TCR):±100ppm/℃——即温度每变化1℃,阻值变化±100×10⁻⁶×原阻值(1MΩ下变化±100Ω),比±200ppm/℃的电阻稳定性提升一倍,可有效减少温度波动对电路性能的影响(如工业现场昼夜温差带来的信号漂移)。

三、封装与物理特性

  1. 封装规格:采用0805英制贴片封装(公制尺寸2.0mm×1.25mm×0.5mm),符合IPC标准,适配主流SMT贴装设备,可大幅节省PCB布局空间,适合高密度电路设计;
  2. 工艺特点:基于厚膜陶瓷工艺制造——相比薄膜电阻成本更低,功率承载能力更强;相比绕线电阻体积更小、适配贴片工艺,兼顾了性能与经济性;
  3. 引脚与焊接:两端为镀锡电极,可兼容回流焊、波峰焊等焊接工艺,焊接后附着力强,长期使用不易出现虚焊问题。

四、环境适应性与可靠性

RK73H2ATTD1004F针对恶劣环境进行了优化,可靠性表现突出:

  1. 宽温工作范围:-55℃~+155℃——覆盖汽车电子(发动机舱温度可达120℃以上)、工业高温设备(如注塑机、锅炉控制系统)等场景,无需额外散热或温度补偿;
  2. 抗恶劣环境能力:可耐受湿度(85℃/85%RH环境下长期工作)、振动(符合汽车级振动测试标准)、冲击等,KOA通过了JIS、IEC等国际可靠性测试,长期失效率低;
  3. 长期稳定性:厚膜工艺的阻值漂移率低(长期存储或工作后阻值变化≤0.5%),适合需要长期稳定运行的设备(如PLC、医疗设备辅助电路)。

五、典型应用场景

该电阻因参数适配性强,广泛应用于以下领域:

  1. 工业控制:PLC模拟量输入分压电路、传感器信号调理(如压力传感器、温度传感器的放大偏置)、电机驱动的电流监测;
  2. 汽车电子:车载显示屏背光控制分压、胎压监测系统(TPMS)的信号处理、发动机管理系统(EMS)的温度传感器接口;
  3. 通信设备:基站射频前端的直流偏置电路、光纤收发器的信号调理、电源模块的电压监测;
  4. 消费电子:高端电源适配器的高压保护电路、音频解码器的信号偏置、智能家居设备的传感器接口。

六、选型与替换参考

  1. 同系列选型:若需调整阻值,可选择KOA RK73系列其他型号(如10kΩ、100kΩ等),保持封装、精度、功率一致;
  2. 替换注意事项:替换时需确保封装(0805)、精度(≤±1%)、功率(≥250mW)、电压(≥150V) 匹配,若需更高精度(如±0.1%)可选择薄膜电阻,但需注意功率会降至100mW以下;
  3. 性价比优势:相比进口同类品牌(如Murata、Yageo的同规格电阻),KOA RK73H2ATTD1004F在价格上更具竞争力,同时可靠性相当。

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