WMSIC Electronic Components

RUILON RL1812A391K

ModelRL1812A391K
Package1812
BrandRUILON
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 Date code within 2 years

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
RUILON RL1812A391K
Type
RUILON
Minimum package
500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
RUILON
Electronic Component
RL1812A391K
Electronic Component
1
Package
1812
Electronic Component
Varistor Resistor
Electronic Component
2.3J
Electronic Component
0.64g
Electronic Component
1
Varistor Voltage
351V~429V
Electronic Component
BM0265611300
Voltage
650V
Operating Voltage(AC)
250V
Operating Voltage(DC)
320V
Surge Current
400A
Electronic Component
Electronic Component

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

RL1812A391K压敏电阻产品概述

RL1812A391K是瑞隆源(RUILON)推出的贴片式氧化锌压敏电阻(MOV),专为电路过压保护设计,具备体积小、抗浪涌能力均衡的特点,广泛适配家电、工业控制、消费电子等场景。以下从核心参数、封装特性、应用场景等维度展开概述。

一、产品基本信息

RL1812A391K的型号命名遵循行业规范,清晰传递关键属性:

  • 品牌:RUILON(瑞隆源),国内过压保护元器件主流厂商;
  • 封装:1812(贴片尺寸1.8mm×1.2mm),适配高密度PCB设计;
  • 核心标识:"391"表示标称压敏电压390V(39×10¹),"K"对应公差±10%;
  • 类型:氧化锌压敏电阻,利用材料非线性特性实现过压分流。

二、关键电气参数解析

压敏电阻的性能核心由电气参数决定,RL1812A391K的关键参数及实际意义如下:

1. 压敏电压(351V~429V)

标称390V,公差±10%,是器件导通阈值电压:当电路电压超过该范围时,电阻值急剧下降,将过压电流分流至地,避免后端元件被击穿。

2. 钳位电压(650V)

指8/20μs标准浪涌电流(模拟雷击浪涌波形)下的最大电压,直接反映过压限制能力:浪涌电压超过压敏电压时,器件将电压钳位在650V以内,保护IC、电容等敏感元件。

3. 工作电压(DC320V/AC250V)

  • 直流工作电压:长期施加的最大直流电压320V,超过则加速器件老化;
  • 交流工作电压:长期交流有效值250V(峰值约353V),适配家用220V电路(峰值311V),留有余量保障可靠性。

4. 浪涌能力(400A/2.3J)

  • 峰值浪涌电流:8/20μs浪涌下的最大耐受电流400A,可应对中等强度雷击、开关浪涌;
  • 浪涌能量:2.3J(焦耳),反映吸收浪涌能量的能力,适合频繁出现低强度浪涌的场景。

三、封装与物理特性

RL1812A391K采用1812贴片封装,物理特性适配自动化生产:

  • 尺寸:1.8mm(长)×1.2mm(宽)×0.8mm(厚,典型值);
  • 焊接兼容性:支持回流焊、波峰焊等常规工艺,峰值温度≤260℃;
  • 温度范围:-40℃~+85℃,满足工业与民用场景环境要求;
  • 环保认证:符合RoHS 2.0、REACH标准,无铅无卤。

四、典型应用场景

该型号适配以下需要过压保护的电路:

1. 家用电器电源

空调、洗衣机、微波炉等220V电源输入:应对压缩机启停浪涌、雷击,保护电源模块。

2. 工业控制电路

PLC、变频器、伺服驱动器电源接口:防止电网波动、电机启停浪涌损坏控制板。

3. 消费电子设备

手机充电器、机顶盒、路由器电源端:避免插拔浪涌损坏充电IC、WiFi模块。

4. LED照明驱动

LED驱动电源输入/输出端:保护LED芯片免受浪涌冲击,延长灯具寿命。

5. 通信设备

交换机、基站电源接口:抗雷击浪涌,保障通信稳定性。

五、选型与使用注意事项

为保障可靠性,使用时需注意:

1. 工作电压匹配

长期电压不得超过DC320V/AC250V,例如:

  • 直流300V电路可直接使用;
  • 交流250V(有效值)需确认峰值(353V)在压敏电压范围内(351V~429V)。

2. 浪涌强度适配

若浪涌电流超过400A,建议并联多个同型号器件(保证参数一致性)。

3. 串联保险丝

压敏电阻失效多为短路,需串联慢熔保险丝,防止短路烧损电路。

4. 焊接工艺控制

避免高温过久(回流焊峰值≤260℃,时间≤10s),防止器件性能下降。

六、品牌与质量背景

瑞隆源专注过压保护元器件10余年,产品覆盖汽车电子、工业控制等领域,RL1812A391K经过温度循环、湿度老化、浪涌寿命测试,符合行业标准,适合批量生产。

综上,RL1812A391K凭借紧凑封装、均衡浪涌能力,成为中低端过压保护场景的高性价比选择。

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