WMSIC Electronic Components

ROHM KTR18EZPF3903

ModelKTR18EZPF3903
Package1206
BrandROHM
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
ROHM KTR18EZPF3903
Type
ROHM
Unit
Electronic Component
Minimum package
5000 圆盘

Technical parameters

Power
250mW
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
ROHM
Electronic Component
KTR18EZPF3903
Electronic Component
1
Package
1206
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.028g
Electronic Component
390kΩ
Electronic Component
1
Electronic Component
BM0264889538
Operating Temperature
55℃~+155℃
Operating Voltage
500V
Electronic Component
±100ppm/℃

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

ROHM KTR18EZPF3903 厚膜贴片电阻产品概述

一、产品核心定位与基础属性

ROHM(罗姆)KTR18EZPF3903是一款1206封装厚膜贴片电阻,属于通用型电阻器件,主打中等功率、中高精度、宽温域适配的特性,可满足工业控制、消费电子、汽车电子等多领域的常规电路需求。作为ROHM厚膜电阻产品线的经典型号,该产品兼顾性能稳定性与成本效益,是批量应用中的高性价比选择。

二、关键电气与物理参数详解

该型号的核心参数明确覆盖了主流应用场景的基本要求,具体如下:

2.1 电气参数

  • 阻值与精度:标称阻值390kΩ,精度±1%——满足大多数信号调理、分压电路对阻值一致性的要求,避免因精度偏差导致的电路性能波动;
  • 功率与电压:额定功率250mW,最大工作电压500V——功率等级适配1206封装的常规负载,500V的电压上限(高于普通1206电阻200-300V的常见值)可支持小电流高压场景;
  • 温度系数:±100ppm/℃——厚膜电阻中偏优的温度特性,温度变化1℃时阻值偏差≤0.039Ω(390kΩ×100ppm),适合宽温域环境下的阻值稳定需求;

2.2 物理与环境参数

  • 封装尺寸:1206封装(公制3.2×1.6mm)——行业通用中小功率封装,焊接兼容性强,可适配常规SMT生产线;
  • 工作温度范围:-55℃+155℃——符合汽车电子(-40125℃)、工业高温环境(部分场景可达150℃)的温度要求,耐高低温冲击性能可靠。

三、封装与可靠性设计特点

KTR18EZPF3903采用厚膜工艺制造,结合1206封装的结构设计,具备以下可靠性优势:

  1. 厚膜工艺特性:通过丝网印刷、高温烧结形成电阻层,相比薄膜电阻成本更低,且抗机械冲击、抗硫化性能更优,适合潮湿、多尘等恶劣环境;
  2. 封装防护:陶瓷基片+环氧树脂涂层的双层结构,可有效隔离潮气、灰尘,提升长期使用的稳定性;
  3. 品牌质量管控:经过ROHM严格的高低温循环(-55~155℃循环测试)、湿度老化(85℃/85%RH)、负载寿命(250mW满载1000小时)测试,确保批量一致性与长期可靠性。

四、典型应用场景适配

基于参数特性,KTR18EZPF3903可广泛应用于以下场景:

  • 工业自动化:传感器信号调理电路(如压力传感器的分压偏置)、PLC输入输出模块的限流电阻;
  • 消费电子:电源适配器的滤波电阻、智能家电的控制电路分压网络;
  • 汽车电子:仪表盘背光电路、车身控制模块(BCM)的辅助电阻(适配-40~125℃的汽车工作温度);
  • 通信设备:基站射频电路的偏置电阻、路由器电源模块的限流元件。

五、性能优势与市场价值

该型号的核心价值在于参数均衡性与成本效益的平衡:

  • 精度±1%、温度系数±100ppm/℃,满足非极端高精度场景的需求,无需额外支付薄膜电阻的成本;
  • 500V工作电压拓展了高压小电流应用的适配性,避免选型时因电压不足需更换大封装的麻烦;
  • ROHM品牌的可靠性保障,降低了批量生产中的不良率与售后维护成本。

综上,ROHM KTR18EZPF3903是一款适配多场景、性能稳定、成本可控的厚膜贴片电阻,适合对精度、功率、温域有常规要求的电路设计。

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