WMSIC Electronic Components

KOA RK73H2ATTD4700F

ModelRK73H2ATTD4700F
Package0805
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 RK73H2ATTD4700F
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
RK73H2ATTD4700F
Electronic Component
1
Package
0805
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.027g
Electronic Component
470Ω
Electronic Component
1
Electronic Component
BM0264554858
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.

RK73H2ATTD4700F 厚膜电阻器产品概述

RK73H2ATTD4700F是日本KOA公司推出的一款表面贴装厚膜电阻器,以紧凑封装、稳定性能和宽环境适应性为核心特点,广泛适用于消费电子、工业控制及汽车电子等领域。以下从核心参数、工艺设计、电气性能等维度展开概述。

一、核心参数概览

该电阻器的核心技术参数明确,可满足多数中小功率电路的基础需求:

  • 电阻类型:厚膜电阻(采用厚膜丝网印刷+高温烧结工艺);
  • 阻值与精度:标称阻值470Ω,精度±1%(工业级常规精度,无需额外校准);
  • 功率与电压:额定功率250mW(即1/4W),最大工作电压150V(需同时满足功率限制);
  • 温度特性:温度系数±100ppm/℃(阻值随温度变化的稳定性指标);
  • 工作温度范围:-55℃至+155℃(覆盖工业低温与高温环境);
  • 封装规格:0805英制封装(对应公制2012,尺寸2.0mm×1.2mm),表面贴装(SMD)形式。

二、设计与工艺特点

RK73H2ATTD4700F采用KOA成熟的厚膜电阻制造工艺,主要特点包括:

  1. 厚膜结构优势:通过丝网印刷将电阻浆料沉积在氧化铝陶瓷基片上,经高温烧结形成致密电阻膜,兼具耐温性与长期稳定性;
  2. 紧凑封装适配:0805封装体积小,适合高密度贴装,可有效降低电路板空间占用,适配手机、平板等小型化设备;
  3. 焊接兼容性:支持回流焊、波峰焊等常规表面贴装工艺,焊接温度范围符合行业标准(峰值温度≤260℃),便于批量生产。

三、电气性能解析

从实际电路应用角度,其电气性能表现稳定可靠:

  • 精度稳定性:±1%的精度可满足信号调理、分压限流等场景的基本匹配需求,避免因阻值偏差导致的电路性能波动;
  • 功率与电压平衡:额定功率250mW需与工作电压结合使用(实际电压需满足(V \leq \sqrt{P \times R} \approx 10.8V),若电压超过此值需降额使用),150V额定电压为极限值,适用于高压小电流场景;
  • 温度系数适配:±100ppm/℃的温度特性,在-55℃至+155℃范围内,阻值变化最大不超过±1%(温度变化100℃时),可稳定应对环境温度波动。

四、封装与适用场景

0805封装的紧凑尺寸使其具备广泛的场景适配性:

  • 消费电子:手机、平板、智能穿戴设备的电源模块、LED指示灯限流(470Ω适配小电流LED);
  • 工业控制:PLC模块、传感器接口电路的偏置电阻、信号匹配网络;
  • 汽车电子:车载中控、传感器信号调理电路(宽温范围适配车载环境);
  • 小型家电:遥控器、加湿器等设备的电源分压、限流电路。

五、可靠性与环境适应性

KOA的制造工艺保障了该电阻器的可靠性与环境适应性:

  • 宽温稳定性:-55℃至+155℃的工作范围,可应对工业低温环境(如北方户外设备)与高温环境(如车载发动机舱附近);
  • 抗机械应力:陶瓷基片与厚膜结构具备一定抗振动、抗冲击能力,适用于运输设备(如无人机、电动车);
  • 长期稳定性:厚膜电阻的老化特性优于碳膜电阻,长期使用后阻值漂移小,可降低设备维护成本。

六、品牌与应用建议

作为KOA旗下产品,RK73H2ATTD4700F继承了品牌的质量优势:

  • 品牌背书:KOA是全球知名电阻制造商,产品一致性好,符合RoHS、REACH等环保标准;
  • 应用注意事项:
    1. 焊接时需控制峰值温度,避免超过260℃导致电阻膜损坏;
    2. 实际使用需根据电路功率需求降额(一般建议降额至额定功率的80%以下);
    3. 存储环境需干燥(湿度≤60%)、常温(15℃-35℃),避免静电损伤。

综上,RK73H2ATTD4700F以平衡的性能、紧凑封装和可靠质量,成为中小功率电路中厚膜电阻的优选方案之一。

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