WMSIC Electronic Components

KOA RK73B1JTTD331J

ModelRK73B1JTTD331J
Package0603
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 RK73B1JTTD331J
Type
KOA
Unit
Electronic Component
Minimum package
5000 圆盘

Technical parameters

Power
125mW
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
KOA
Electronic Component
RK73B1JTTD331J
Electronic Component
1
Package
0603
Electronic Component
SMD Resistor
Electronic Component
±5%
Electronic Component
0.023g
Electronic Component
330Ω
Electronic Component
1
Electronic Component
BM0265802652
Operating Temperature
55℃~+155℃
Operating Voltage
75V
Electronic Component
±200ppm/℃

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

RK73B1JTTD331J 厚膜贴片电阻产品概述

一、产品定位与核心属性

RK73B1JTTD331J是日本KOA公司推出的0603封装通用厚膜贴片电阻,属于中小功率电阻范畴,主打“体积紧凑+性能稳定+成本可控”的平衡,适配对PCB空间敏感且无需超高精度的电子电路场景。其型号命名遵循行业惯例:“RK73B”为KOA厚膜贴片电阻系列标识,“1JTTD”包含封装、精度等参数,“331J”中“331”代表阻值330Ω(33×10¹),“J”为精度±5%的行业通用标识。

二、关键参数解析

该电阻的核心参数覆盖了通用电路的核心需求,具体解析如下:

2.1 阻值与精度

阻值为330Ω,是电子电路中常用的标准阻值(常用于信号分压、晶体管偏置、LED限流等场景);精度为**±5%**,满足大多数消费电子、工业控制的基本精度要求,无需为超精度(如±1%)支付额外成本,适合对精度要求不苛刻的批量电路。

2.2 功率与电压

  • 额定功率:125mW(0.125W),适配0603封装的功率上限(同类封装常见功率为1/10W即100mW,125mW略高,需注意降额使用);
  • 最大工作电压:75V(直流/交流峰值),需明确:该电压为最大连续工作电压,不可单独作为使用依据(若电路电压接近75V,需验证功率是否匹配——P=U²/R=75²/330≈17W,远超过额定功率,因此实际使用需结合功率降额)。

2.3 温度系数

温度系数(TCR)为**±200ppm/℃**,即温度每变化1℃,阻值变化±200×10⁻⁶;换算为温度变化100℃时,阻值变化±2%,与±5%精度匹配,满足宽温环境下的阻值稳定性要求。

三、封装与物理特性

采用0603封装(英制:0.06英寸×0.03英寸,公制1608:1.6mm×0.8mm),是贴片电阻中“小型化”的典型封装之一,适配高密度PCB贴装(如手机主板、可穿戴设备等空间受限场景)。

制造工艺为厚膜印刷烧结:通过在氧化铝陶瓷基板上印刷电阻浆料并高温烧结而成,相比薄膜电阻成本更低,且抗机械应力、抗浪涌能力更强,适合批量生产的一致性要求。

四、环境适应性

工作温度范围为**-55℃~+155℃**,覆盖了:

  • 低温场景:工业户外设备(如冬季户外传感器)、车载电子(低温启动环境);
  • 高温场景:靠近电源模块、CPU等热源的电路,或高温工业环境(如烤箱内的小型控制器)。

该温区比一般消费级电阻(0℃~70℃)宽约2倍,可靠性更高,可避免极端温度下阻值漂移或失效。

五、品牌与可靠性保障

KOA作为日本老牌电子元器件厂商(成立于1940年),在电阻领域拥有成熟的工艺积累:

  • 厚膜电阻浆料配方稳定,批量生产中同批次阻值偏差通常远小于±5%标称值;
  • 符合RoHS、REACH等全球环保标准,适配出口市场;
  • 抗硫化、抗湿性能达标(符合IEC 60068-2-60等标准),适合复杂环境应用。

六、典型应用场景

RK73B1JTTD331J的参数特性使其适配多种场景:

  1. 便携电子:手机、蓝牙耳机、智能手表的信号分压、麦克风偏置电路(体积小,功率匹配);
  2. 工业控制:小型PLC、温度传感器接口的限流电阻(宽温区适配工业环境);
  3. 车载电子:仪表盘背光驱动、辅助系统小信号电路(低温性能满足车载要求);
  4. 消费电子:机顶盒、路由器的电源滤波反馈电路、LED指示灯限流(成本可控)。

七、使用注意事项

  1. 降额使用:实际功率建议不超过额定功率的80%(即100mW),避免长期过载导致阻值漂移;
  2. 电压限制:不可超过75V最大工作电压,同时需结合功率计算(如100mW时,最大允许电压≈5.7V);
  3. 焊接要求:采用回流焊工艺,温度需符合KOA推荐的回流曲线(峰值温度≤245℃,避免高温损坏电阻)。

该电阻凭借“小体积+宽温区+高性价比”的优势,成为中小功率电路的通用选型之一,适合对成本敏感且需要稳定性能的批量应用。

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