WMSIC Electronic Components

LUTE 1812L300/30GR 1812L300

Model1812L300/30GR
Package1812
BrandLUTE
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+

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Technical data

Product details

19 specifications

Core information

Product name
LUTE 1812L300 / 30GR
Type
1812
Minimum package
1500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
LUTE
Electronic Component
1812L300/30GR
Electronic Component
1
Electronic Component
3.41mm
Package
1812
Electronic Component
Resettable Fuse
Electronic Component
0.136g
Electronic Component
4.73mm
Electronic Component
1.6mm
Electronic Component
1
Electronic Component
4s
Electronic Component
BM0263555821
Operating Temperature
40℃~+85℃
Voltage Rating(Vmax)
30V
Power(Pd)
1.6W

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

1812L300/30GR 产品概述

一、产品简介

1812L300/30GR 是 LUTE(陆特)推出的一款 1812 封装的自恢复过流保护元件(可复位保险/聚合物 PTC),专为汽车电子与工业控制端口提供可靠的过流与过温保护。体积小(1812)且支持较高电压与大电流,适用于空间受限但对保护性能要求较高的场合。

二、主要规格

  • 额定耐压(Vmax):30 V
  • 最大瞬时电流(Imax):40 A
  • 保持电流(Ihold):3 A
  • 跳闸电流(Itrip):5 A
  • 消耗功率(Pd):约 1.6 W
  • 初始态阻值(Rmin):10 mΩ
  • 跳断后阻值(R1max):60 mΩ
  • 动作时间:约 4 s
  • 工作温度范围:-40 ℃ ~ +85 ℃
  • 尺寸:4.73 mm × 3.41 mm × 1.6 mm(1812 封装)

三、工作原理与关键特性

在正常工作电流低于 Ihold 时,器件呈现低阻态(典型 Rmin),对电路影响甚微;当电流上升并超过 Itrip,器件内部温度升高,材料发生正温度系数效应,阻值显著上升(不超过 R1max),限制电流并保护电路。故障排除并冷却后器件可自动恢复至低阻态,适合重复性过流事件的保护。Pd 值表征在特定条件下的损耗与热状态,对布局散热设计有参考价值。

四、封装与安装优势

1812 封装尺寸小,占板面空间有限,厚度约 1.6 mm,适配自动贴装工艺。低阻初始态有利于降低导通损耗;跳断后阻值仍维持在合理范围,能有效限制故障电流。适合与汽车线束、接线端子、控制模块等紧凑空间配合使用。

五、典型应用场景

  • 汽车电子:车载照明、信息娱乐、电源分配与控制单元的端口保护
  • 工业控制:接线端口、继电器驱动、传感器供电保护
  • 通讯与消费电子:需防护短路或过流的电源输入端

六、使用建议与注意事项

  • 设计时需考虑留有足够的散热面积与附近元件间距,以保证器件正常热回路;
  • 在可能存在反复大电流冲击的场合,建议评估器件寿命与复位表现;
  • 工作环境接近极限温度时应进行额外验证,确保 Ihold/Itrip 与动作时间满足系统需求;
  • PCB 导线与焊点应能承受器件可能的短时高电流(Imax)。

该器件以其小体积、高耐压与良好自恢复特性,成为汽车与工业领域中端口过流过温保护的理想选择。

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