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ST MM1Z7V5 Zener diode MM1Z7V5
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
18
specifications
Core information
- Product name
- ST MM1Z7V5
- Type
- ST
- Minimum package
- 3000
Technical parameters
- Electronic Component
- ST
- Electronic Component
- MM1Z7V5
- Electronic Component
- 1
- Package
- SOD-123
- Electronic Component
- Zener Diode
- Electronic Component
- 0.028g
- Electronic Component
- 1
- (Zzt)
- 30Ω
- Electronic Component
- BM0232256317
- Diode
- 1
- Current(Ir)
- 500nA
- Power Dissipation(Pd)
- 500mW
- Electronic Component
- 7V~7.9V
- Electronic Component
- 3000
- Electronic Component
- 7.5V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MM1Z7V5 稳压二极管（SOD-123）产品概述
一、产品简介
MM1Z7V5 是一颗独立式（分立）稳压二极管，标称稳压值 7.5V，品牌 ST（先科），封装为 SOD-123。该器件适用于低功耗、紧凑电路中的电压参考、限压与偏置等场景，结构简单、易于贴片组装。
二、主要特性
- 稳压值（标称）：7.5V，允许范围 7.0V ～ 7.9V，适合对电压精度有中等要求的应用。
- 低反向漏电流：Ir ≈ 500nA（在 4V 时测得），适合高阻抗或低泄漏要求的电路。
- 低功耗封装：耗散功率 Pd = 500mW，单器件功率不大，适合小电流稳压场合。
- 动态阻抗：Zzt ≈ 30Ω，电流变化时稳压值会随之波动，应在设计中考虑电源阻抗与负载变化。
三、关键电气参数及设计含义
- 最大持续电流（理论）：Imax ≈ Pd / Vz = 500mW / 7.5V ≈ 66mA。实际应留裕量，长期工作建议远低于该值以避免过热加速老化。
- 动态阻抗 30Ω 表示在测试工作电流附近，输出电压对电流变化的敏感度较高，若需更稳压性能，应通过串联限流或选用更低 Zzt 的型号。
- 低漏电流利于在偏置或检测电路中使用，但在高温下漏电会增大，应注意环境温度对 Ir 的影响。
四、典型应用场景
- 低功耗参考电压源、基准偏置。
- 过压钳位与瞬态抑制（配合限流、浪涌吸收器件）。
- 小信号放大电路的偏置稳定、测试与测量电路的参考点。
五、封装与热管理
SOD-123 体积小、散热能力有限，采用贴片工艺安装时应保证良好的散热路径：
- PCB 布局建议增大焊盘铜面积并加热沉区域，缩短与热敏元件的铜走线。
- 在高环境温度或高占空比工作时，对器件进行功率降额处理，避免接近 Pd 上限。
六、选型与使用建议
- 若负载电流波动大或对电压精度要求高，考虑并联小阻值限流电阻或选用更大功率/更低阻抗的稳压元件。
- 设计时按最大工作电流和环境温度计算耗散并设置安全裕度（典型保守值建议工作电流 ≤ Imax 的 30%~50%）。
- 对应高阻抗输入或精密测量，注意温漂与漏电随温度变化的影响，并在必要时做温度补偿或选择温漂更好的参考源。
七、注意事项与可靠性
- 避免长时间在 Pd 附近工作，以提高可靠性与寿命。
- 焊接温度与时间应遵循 SOD-123 的回流焊规范，防止热损伤。
- 应用中注意浪涌电流与反向过压保护，必要时与限流元件或瞬态抑制器配合使用。
总体而言，MM1Z7V5 是一款适合用于小功率、体积受限场合的 7.5V 独立稳压二极管，设计时重视热管理与电流控制可获得稳定可靠的性能。
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