WMSIC Electronic Components

Walsin WR12W2004FTL

ModelWR12W2004FTL
Package1206
Brand(Walsin)
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
(Walsin) WR12W2004FTL
Type
WALSIN
Unit
Electronic Component
Minimum package
5000 圆盘

Technical parameters

Power
250mW
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
(WALSIN)
Electronic Component
WR12W2004FTL
Electronic Component
1
Package
1206
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.044g
Electronic Component
2MΩ
Electronic Component
1
Electronic Component
BM0228208180
Operating Temperature
55℃~+155℃
Operating Voltage
200V
Electronic Component
±100ppm/℃

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

WR12W2004FTL厚膜固定电阻器产品概述

一、产品核心定位与品牌背景

WR12W2004FTL是华新科(Walsin)推出的通用型厚膜固定电阻器,属于其WR12W系列主力型号。作为电子电路中最基础的被动元件之一,该型号以「2.00MΩ标准阻值+±1%精度+250mW(1/4W)额定功率」为核心特征,兼顾性能稳定性与成本效益,适配中低功耗电子系统的批量应用。

华新科作为全球被动元件头部厂商,在厚膜电阻领域拥有20余年工艺积累,产品覆盖消费电子、工业控制、汽车电子等多领域。WR12W2004FTL继承了品牌在厚膜电阻上的可靠性优势,符合RoHS、REACH等环保标准,适配现代电子设备的小型化与自动化生产需求。

二、关键电气性能参数解析

该型号的电气参数直接决定应用场景的适配性,核心参数及实际意义如下:

1. 阻值与精度

标称阻值2.00MΩ(对应电阻代码「2004」,即200×10⁴Ω),精度±1%。这一精度属于「通用精度」范畴:既满足大多数电路对阻值一致性的要求(如分压电路的电压比例控制),又避免了高精度电阻(如±0.1%)的成本溢价,平衡了性能与成本。

2. 额定功率

250mW(1/4W):是电阻长期连续工作允许的最大功耗。实际应用需结合环境温度降额(如155℃高温下,功率需降至额定值的50%),避免过热导致阻值漂移或失效。

3. 工作电压

200V:由器件绝缘性能与封装耐压决定。2.00MΩ阻值下,200V对应的工作电流仅100μA(功率20mW),远低于额定功率,因此电压限制是器件安全工作的核心边界(过高电压可能击穿绝缘层)。

4. 温度系数(TCR)

±100ppm/℃:表示阻值随温度变化的速率(温度每升1℃,阻值变化±100×10⁻⁶)。以2.00MΩ为例,温度变化100℃时,阻值仅变化±200Ω(±0.01%),这一稳定性足以满足工业、汽车等宽温场景的需求。

三、物理特性与环境适应性

WR12W2004FTL采用厚膜工艺制造,具备以下优势:

1. 工艺稳定性

厚膜电阻通过「丝网印刷+高温烧结」形成电阻膜,相比碳膜电阻更稳定,相比薄膜电阻成本更低,适合批量应用。

2. 宽温工作范围

-55℃~+155℃:覆盖工业控制(户外设备)、汽车电子(发动机舱附近)等极端温度场景,无需额外温度补偿电路。

3. 封装适配性

适配表面贴装(SMD)工艺,可与其他SMD元件集成,满足现代电子设备小型化、自动化生产的需求(封装尺寸符合行业通用标准,无需特殊治具)。

四、典型应用场景

结合参数特征,该型号的核心应用场景包括:

1. 工业控制电路

  • 传感器信号调理:如压力、温度传感器的输出分压(利用±1%精度稳定电压比例);
  • 低功耗控制模块:作为限流电阻(250mW功率满足小电流控制需求)。

2. 电源模块

  • 开关电源/线性电源的反馈网络:利用稳定阻值控制电压输出精度;
  • 电源启动电路:作为分压电阻实现软启动功能。

3. 汽车电子

  • 车载传感器接口:如胎压监测、水温传感器的信号匹配(宽温适配汽车不同工况);
  • 车载辅助电路:如LED指示灯的限流(低功耗+宽温)。

4. 消费电子

  • 智能家居控制:如智能开关的按键分压电路;
  • 小型家电:如加湿器、电风扇的控制模块(平衡成本与性能)。

五、选型与应用注意事项

为确保长期可靠运行,应用时需注意:

1. 功率降额

  • 环境温度≤85℃:实际功耗≤额定值的80%;
  • 85℃~125℃:实际功耗≤70%;
  • 125℃~155℃:实际功耗≤50%。

2. 电压限制

工作电压不得超过200V(即使功率未达额定值,过高电压可能击穿绝缘层)。

3. 温度系数补偿

若应用场景对精度要求高于1%(如精密测量),需结合环境温度计算阻值偏差(如100℃变化下偏差±200Ω),或采用温度补偿电路。

4. 焊接工艺

遵循华新科推荐曲线:回流焊峰值温度≤260℃(时间≤10秒),波峰焊温度≤250℃(时间≤5秒),避免高温损坏电阻膜。

总结

WR12W2004FTL是一款高性价比厚膜电阻,以稳定的电气性能、宽温适应性与成本优势,成为工业、汽车、消费电子等领域的常用选型,适合对阻值精度、功率有中等需求的电子电路设计。

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