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ST MM1Z4V3 Zener diode MM1Z4V3
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST MM1Z4V3
- Type
- ST
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ST
- Electronic Component
- MM1Z4V3
- Electronic Component
- 1
- Package
- SOD-123
- Electronic Component
- Zener Diode
- Electronic Component
- 0.028g
- Electronic Component
- 1
- (Zzt)
- 130Ω
- Electronic Component
- BM0259370910
- Diode
- 1
- Current(Ir)
- 5uA@1V
- Power Dissipation(Pd)
- 500mW
- Electronic Component
- 4V~4.6V
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MM1Z4V3 4.3V 0.5W 稳压二极管（SOD-123）产品概述
一、产品简介
MM1Z4V3 是一款独立式稳压（齐纳）二极管，标称稳压值 4.3V，额定耗散功率 0.5W，常见封装为 SOD-123，适用于空间受限的表面贴装电路。厂商：ST（先科）。该器件用于提供简单的基准电压、浪涌/瞬态箝位和低成本电源稳压方案。
二、主要电气参数
- 标称稳压：4.3V（典型范围 4.0V ～ 4.6V）
- 反向漏电流：Ir = 5 μA @ 1V（典型测量条件）
- 耗散功率：Pd = 500 mW（封装和环境温度相关需降额）
- 动态阻抗：Zzt = 130 Ω（表征电流变化对电压的影响）
说明：在给定 Zzt 下，电流变化 1 mA 会引起约 130 mV 的电压变化，表明本器件适合对精度要求不高的基准或箝位场合。
三、封装与热特性
SOD-123 为小型表贴封装，便于高密度 PCB 布局与自动贴装。500 mW 的功耗受限于封装的热阻与 PCB 散热条件，实际允许的稳压电流需按 Pd/Vz 理论估算（I理论_max ≈ 0.5W / 4.3V ≈ 116 mA），但在实际设计中应根据温升曲线与环境温度作降额并查阅完整数据手册。
四、典型应用场景
- 小功率基准电压源与偏置电路
- 输入过压或瞬态电压箝位保护
- 数模转换与参考电平（对精度要求不高的场合）
- 低成本电源稳压（与串联限流电阻配合使用）
五、设计与使用建议
- 采用稳压工作时，计算限流电阻以保证稳压区电流与最大功耗不超限；考虑环境温度与散热条件进行功率降额。
- 若需较稳定的参考电压，应降低电流变化或选择低 Zt 的型号；本件 Zzt 较大，不适合高精度参考。
- PCB 布局时应增加铜箔散热面积以提升功耗能力，并保证焊盘符合 SOD-123 推荐封装尺寸。
- 在高温或长期工作时，参考厂商温度系数与降额曲线进行可靠性评估。
六、优点与注意事项
优点：封装小、成本低、适用多种低功耗稳压与保护场景。
注意事项：稳压精度受电流和温度影响较大（Zzt 较高），漏电流在低压条件下存在，设计时需考虑这些因素并阅读完整数据手册以确认测试条件与极限参数。
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