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DOWO MVR1812-470G MVR1812
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO MVR1812-470G
- Type
- DOWO
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- MVR1812-470G
- Electronic Component
- 1
- Package
- 1812
- Electronic Component
- Varistor Resistor
- Electronic Component
- 5J
- Electronic Component
- 0.193g
- Electronic Component
- 1
- Varistor Voltage
- 47V
- Electronic Component
- BM0258760026
- Voltage
- 77V
- Static Capacitor
- 950pF@1MHz
- Operating Voltage(AC)
- 28V
- Operating Voltage(DC)
- 36V
- Surge Current
- 500A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MVR1812-470G 产品概述
MVR1812-470G 是 DOWO（东沃）推出的一款通用型金属氧化物压敏电阻（MOV），封装为 1812（英制），适用于对瞬态过电压有抑制需求的电子设备与电源模块。器件在低工作电压下具备较高的峰值浪涌能力与能量吸收能力，适合中低压直流及交流系统的过压保护。
一、主要参数概览
- 压敏电压（Vd）：47 V
- 钳位电压（Vc）：77 V
- 工作电压 DC：36 V
- 工作电压 AC：28 V
- 峰值浪涌电流 (Imax)：500 A
- 能量吸收：5 J
- 静态电容：950 pF @ 1 MHz
- 品牌：DOWO（东沃）
- 封装：1812（约 4.6 × 3.2 mm）
二、性能特点
- 高浪涌承受能力：单次峰值浪涌电流可达 500 A，适合抗雷击冲击和开关突波。
- 有效钳位电压：77 V 的钳位特性可以在过压事件中快速限制电压峰值，保护后级元件。
- 能量吸收能力：5 J 的吸能能力适用于短时大能量脉冲的缓冲。
- 较高静态电容：950 pF（1 MHz）需在高速信号或精密模拟电路中留意对信号的影响，可能引起高频耦合或滤波效应。
- 封装小巧：1812 封装便于在空间受限的电路板上布局并实现自动贴装生产。
三、典型应用场景
- 开关电源输入端和输出端的瞬态电压保护。
- 通信设备、电源适配器、充电器的浪涌抑制。
- 工业控制、电池保护与汽车辅助电路（注意验证温度与冲击适应性）。
- 对于对寄生电容敏感的高频信号线路，需评估 950 pF 静态电容带来的影响并考虑并联或替代方案。
四、选型与使用建议
- 工作电压选择：器件 DC 工作电压 36 V / AC 工作电压 28 V，优先用于不超过该额定电压的系统；长期在额定值附近工作会降低寿命。
- 考虑静态电容：若电路为高频或高阻抗输入，应评估压敏电阻的 950 pF 对信号完整性的影响，必要时选择低电容型号或移至非敏感节点。
- 布局与焊接：尽量将 MOV 放置于靠近被保护端的输入端，保证最短导线路径以降低串联电感；遵循封装热量和焊接工艺规范，推荐回流焊兼容工艺。
- 可靠性与冗余：对关键设备建议使用并联或与气体放电管、TVS 二极管等组合保护以获得更优的钳位和能量分担特性。
五、存储与安全注意
- 避免在高温高湿环境长期存放，出厂包装应保持密封，建议干燥箱中保管。
- 安装调试时避免超过器件最大浪涌能力（500 A）与能量限制（5 J），长时间超额冲击会引起热失效或永久击穿。
- 对于需满足安规与认证的产品，选型时应参考相应的安全标准和厂商的寿命曲线与测试报告。
MVR1812-470G 以其紧凑封装与较高的浪涌承受能力，适合作为多数中低压电子设备的经济型瞬态抑制元件。在实际应用中请结合系统电压、频带要求与振幅容限进行综合评估。
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