WMSIC Electronic Components

DOWO MVR1210-390G MVR1210

ModelMVR1210-390G
Package1210
BrandDOWO
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 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
DOWO MVR1210-390G
Type
DOWO
Minimum package
3000 编带

Technical parameters

Electronic Component
Electronic Component
Electronic Component
DOWO
Electronic Component
MVR1210-390G
Electronic Component
1
Package
1210
Electronic Component
Varistor Resistor
Electronic Component
1.5J
Electronic Component
0.08g
Electronic Component
1
Varistor Voltage
39V
Electronic Component
BM0258760025
Voltage
65V
Static Capacitor
850pF@1MHz
Operating Voltage(AC)
24V
Operating Voltage(DC)
30V
Surge Current
250A

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

MVR1210-390G 产品概述

一、产品简介

MVR1210-390G 是 DOWO(东沃)推出的一款表面贴装型多层压敏电阻(MLVR/多层金属氧化物压敏陶瓷),用于抑制瞬态过电压和浪涌能量,保护电子电路中对过压敏感的器件。1210 封装在尺寸和功率能力之间取得平衡,适合工业、电源和通信等应用领域的中低能量浪涌防护需求。

二、主要参数

  • 标称压敏电压(压敏电压):39 V(标称值,具体测试条件请以厂家数据手册为准)
  • 钳位电压:65 V(在规定浪涌条件下测得的峰值钳位)
  • 工作电压(DC):30 V
  • 工作电压(AC):24 V
  • 峰值浪涌电流:250 A(瞬态峰值能力)
  • 能量吸收:1.5 J(在厂家指定浪涌波形条件下的单次吸收能力)
  • 静态电容:850 pF @ 1 MHz
  • 封装:1210(符合常见SMD回流焊工艺)
  • 品牌:DOWO(东沃)

三、核心特性与优势

  • 有效的瞬态抑制:39 V 的压敏阈值与 65 V 的钳位电压配合,可在系统发生浪涌或瞬态过压时将被保护节点电压限制在安全范围内,保护下游元件。
  • 高峰值浪涌能力:250 A 的峰值浪涌电流和 1.5 J 的单次能量吸收能力,使其能抵御常见的电源浪涌、开关瞬变和间接雷击引起的高幅度冲击。
  • 适配中等工作电压系统:30 V DC / 24 V AC 的工作电压等级,适用于 12 V、24 V 等常见工业与消费类电源总线防护。
  • 封装与可焊性:1210 封装便于自动贴片和回流焊接,适合批量生产和 SMT 组装流程。
  • 注意:850 pF 的较大静态电容会对高速信号线(如高速数据总线、USB/HDMI 等)产生影响,因此不建议用于高频高速信号直接保护。

四、典型应用场景

  • 工业控制与自动化设备的电源总线防护(24 V/30 V 系统)
  • 通信设备与基站电源保护(用于电源输入或配电保护)
  • 家电与消费电子产品的输入浪涌保护
  • 电源适配器、充电器以及中小功率供电模块的防雷/浪涌保护
  • 现场设备(传感器、执行器)供电线上用于减缓瞬变冲击

五、封装与安装建议

  • 布局:靠近被保护的器件或电源输入端尽可能短的引线/走线连接,以提高抑制效率并减少串联感抗影响。
  • 接地:如果用于单端接地方案,应保证高质量低阻抗地线连接以便快速引流浪涌能量。
  • 焊接工艺:采用标准 SMT 回流焊工艺,遵循厂商推荐的回流温度曲线(避免多次高温回流),注意焊盘设计与焊膏量以保证良好焊接及热传导。
  • 封装热管理:1210 相对较大,具有一定热容量,但在连续或频繁浪涌情况下需考虑 PCB 热散逸与周围元件的热影响。

六、使用注意事项与可靠性

  • 极性:多层压敏电阻通常为无极性器件,可双向抑制;具体型号如有特殊结构请参照技术手册确认。
  • 信号完整性:850 pF 的静态电容会在高频下引入显著负载,可能降低高速接口的信号质量,避免用于高速差分线或敏感模拟线路。
  • 浪涌规范:能量与峰值电流指标通常基于某一标准波形(例如 8/20µs、10/1000µs 等)测得,设计时应参照完整数据手册并对照系统可能遭受的浪涌类型选型。
  • 长期可靠性:频繁或超额的冲击会降低器件寿命或导致失效,应按照系统的浪涌发生概率和器件循环承受能力进行合适冗余或并联/串并联配置。
  • 环境与温度:高温环境下器件参数会发生漂移,设计时需考虑工作温度范围和热平衡。

七、选型建议

  • 若目标保护线路为 12–24 V 级别电源总线,且需要中等能量的瞬态抑制,MVR1210-390G 是合适选择。
  • 若保护高速数据线或 RF 线路,应选择低电容型的 TVS 或在设计中采用远离信号路径的保护方式。
  • 在需要更高能量吸收或更低钳位的场合,可考虑更大封装或并联器件,但需注意并联匹配与热管理。
  • 最终选型与可靠性评估请参考 DOWO 的完整规格书和测试曲线,并在实际系统中做必要的浪涌/ESD 测试验证。

如需我帮忙整理设备在特定工况下的仿真、PCB 布局建议或与其它型号的对比(如更高能量/更低电容的替代品),可以提供系统电压和应用场景,我将给出更具体的设计建议。

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