WMSIC Electronic Components

ST MM1Z33 Zener diode MM1Z33

ModelMM1Z33
PackageSOD-123
BrandST
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
ST MM1Z33
Type
SOD-123
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
ST
Electronic Component
MM1Z33
Electronic Component
1
Package
SOD-123
Electronic Component
Zener Diode
Electronic Component
0.028g
Electronic Component
1
(Zzt)
80Ω
Electronic Component
BM0264594279
Diode
1
Current(Ir)
100nA@25V
Power Dissipation(Pd)
500mW
Electronic Component
31V~35V
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.

MM1Z33稳压二极管产品概述

一、产品基本信息与封装规格

MM1Z33是一款独立式稳压二极管,由ST(先科)品牌推出,采用SOD-123表面贴装封装。该封装体积小巧(典型尺寸约2.4×1.6mm),适配小型化电子设备的高密度贴装需求,广泛应用于消费电子、工业控制等领域的小功率稳压场景。

产品型号中“MM1Z”为ST稳压二极管系列标识,“33”直接对应其核心稳压值,是快速识别参数的关键依据。

二、核心电气参数详解

MM1Z33的参数针对小功率稳压场景优化,关键指标如下:

2.1 稳压核心特性

  • 标称稳压值(Vz):33V,是电路设计中最核心的电压参考;
  • 稳压值范围:31V~35V,为生产公差范围,满足批量应用的一致性要求;
  • 动态阻抗(Zzt):80Ω,指稳压管工作电流范围内电压随电流变化的比率——该值越小,稳压稳定性越强,MM1Z33的80Ω阻抗适合中等精度需求。

2.2 功耗与漏电流

  • 最大耗散功率(Pd):500mW(0.5W),是器件可持续承受的最大功率,设计时需严格控制实际功耗;
  • 反向漏电流(Ir):100nA(@25V),即稳压管反向偏置(未击穿)时的漏电流,该值极低,可忽略对低功耗电路的影响。

三、典型应用场景

MM1Z33因33V中等稳压值、小封装和低功耗,适配以下常见场景:

3.1 小功率电源稳压

作为直流电源输出稳压元件,用于小型开关电源、线性电源的辅助稳压(如5V/12V电源的次级稳压,或33V左右电压的直接稳压),可有效抑制电压波动,提升电源输出精度。

3.2 基准电压源

在简单ADC(模数转换器)、传感器信号调理电路中,作为参考电压基准(满足一般工业控制精度需求),为信号采样提供稳定的33V参考,替代部分精密基准元件降低成本。

3.3 过压保护钳位

并联在信号或电源线路中,当电压超过33V时击穿导通,将电压钳位在33V左右,防止后级电路(如MCU、传感器)因过压损坏,适合消费电子(充电器)、汽车电子(低功率模块)的过压防护。

四、选型与使用注意事项

为确保器件可靠性,需注意以下要点:

4.1 稳压值匹配

需根据电路实际需求选择:若需33V稳定电压可直接选用;若需其他电压,切换同系列型号(如MM1Z27、MM1Z39)。

4.2 功耗计算

实际工作功耗需满足Pd≤500mW,通过公式计算工作电流上限:
I≤Pd/Vz=500mW/33V≈15mA
设计时需串联限流电阻,避免电流过大烧毁器件。

4.3 封装与焊接

SOD-123为表面贴装封装,焊接需注意:

  • 回流焊峰值温度≤260℃,焊接时间≤10秒;
  • 避免机械应力导致封装开裂,适配波峰焊、回流焊等自动化工艺。

4.4 环境适应性

工作温度范围通常为-55℃~+150℃(ST稳压二极管典型范围),适合工业级和消费级环境,但需避免长期暴露在高湿度、腐蚀性气体中。

五、总结

MM1Z33是一款性价比高的33V/0.5W独立式稳压二极管,以SOD-123小封装、低漏电流、稳定稳压特性为核心优势,广泛应用于电源稳压、基准参考、过压保护等小功率场景。其参数清晰、选型简单,是电子设计中中等电压稳压需求的常用元件。

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