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MDD MM1W18
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MDD MM1W18
- Type
- MDD
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MDD
- Electronic Component
- MM1W18
- Electronic Component
- 1
- Package
- SOD-123
- Electronic Component
- Zener Diode
- Electronic Component
- 0.034g
- Electronic Component
- 1
- (Zzt)
- 20Ω
- Electronic Component
- BM0264463842
- Diode
- 1
- Current(Ir)
- 5uA@13V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 16.8V~19.2V
- Electronic Component
- 55℃~+150℃
- 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.
MM1W18 产品概述
一、概述
MM1W18 是 MDD 出品的一款通用贴片稳压二极管（SOD-123 封装），标称稳压值 18V，精度为 ±5%。器件针对一般电子电路的稳压、基准与瞬态钳位场合进行了优化，具有较低的反向漏电流，可靠的热稳定性和便于自动化贴装的封装形式，适合功率需求不大的便携设备与工业控制电路。
二、主要电气参数
- 标称稳压值（Vz）：18V（公差 ±5%，实际范围 16.8V～19.2V）
- 反向电流（Ir）：5 μA @ 13V（低漏电流，有利于偏置电路和高阻输入）
- 耗散功率（Pd）：1W（SOD-123 小型封装，适用于低功耗稳压与钳位）
- 动态阻抗（Zzt）：20 Ω（表征在工作点下的增量阻抗，影响输出纹波与稳压精度）
- 工作结温范围：-55 ℃ ～ +150 ℃
注：以上参数应以厂商规格书中给定的测试条件为准，实际应用中需留意测试电流与环境条件对参数的影响。
三、应用场景
- 低功耗的基准源与偏置电路：18V 级别的固定稳压，适合为放大器或比较器提供稳定偏置。
- 输入/信号线路的电压钳位与浪涌抑制：在瞬态过压时提供限幅保护。
- 工业控制与消费电子中的简易稳压：当系统允许以齐纳形式并联吸收多余电流时，可作为经济型稳压方案使用。
- 测试与实验电路：便捷的封装和较宽的温度范围利于开发调试。
四、封装与装配建议
SOD-123 表面贴装封装支持高效率自动贴装与回流焊接。建议在 PCB 设计时：
- 将焊盘与走线尽量靠近被稳压的节点，缩短引线长度以降低寄生电感与电阻；
- 在需要散热时，增大焊盘铜面或添加散热地/铜层以帮助耗散器件产生的热量；
- 标注极性（齐纳负极/有标识一端）并在丝印上注明方向，确保贴装正确；
- 储存与回流焊按一般 SMD 器件规范操作，避免过度潮湿与重复高温循环。
五、选型与使用注意
- 当负载和稳压精度要求较高时，应选用低阻抗或更高功率等级的器件，或采用专用线性稳压器；
- 1W 的耗散功率在小封装下受环境温度影响显著，使用时需参考热阻与降额曲线，避免长期在高温和大电流下工作；
- 低漏电流特性使其适合高阻输入场合，但若工作电压接近或超过 13V 时应关注 Ir 指标；
- 如需更严格的参数一致性或更低的温漂，请选择精度更高或温度系数更优的型号。
结论：MM1W18 以其 18V 的稳压等级、5% 的通用精度、低漏电流和 SOD-123 的贴片封装，为低功耗稳压与钳位应用提供了经济、可靠的解决方案。在实际设计中通过合适的 PCB 散热设计与电流降额可以获得稳定的长期工作性能。若需完整规格与典型特性曲线，请参考 MDD 官方规格书。
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