WMSIC Electronic Components

ST ZMM5237BPF Zener diode ZMM5237BPF

ModelZMM5237BPF
PackageLL-34
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 ZMM5237BPF
Type
ST
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
ST
Electronic Component
ZMM5237BPF
Electronic Component
1
Package
LL-34
Electronic Component
Zener Diode
Electronic Component
0.041g
Electronic Component
1
(Zzk)
500Ω
(Zzt)
8Ω
Electronic Component
BM0227773903
Diode
1
Current(Ir)
3uA
Power Dissipation(Pd)
500mW
Electronic Component
7.79V~8.61V
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.

ZMM5237BPF稳压二极管产品概述

一、产品基本信息

ZMM5237BPF是ST(先科)品牌推出的小型表面贴装稳压二极管,核心功能为输出稳定的8.2V电压。该型号属于低功耗稳压管系列,采用LL-34封装,适配高密度PCB设计,是电子电路中稳压、过压保护的常用元件,广泛应用于便携式设备、传感器模块等场景。

二、核心电气参数详解

ZMM5237BPF的关键参数决定了其适用范围,具体解析如下:

1. 稳压精度与范围

标称稳压值为8.2V,精度为**±5%**(对应范围7.79V~8.61V),能满足一般电路对电压稳定性的要求。实际工作中,稳压值随温度略有变化(典型温度系数约+2mV/℃),需根据环境温度适当考量。

2. 耗散功率

最大允许耗散功率(Pd)为500mW(0.5W),这是器件长期稳定工作的功率上限。若实际功耗超过该值,会导致过热烧毁,需通过串联限流电阻控制工作电流。

3. 反向漏电流

稳压状态下的反向电流(Ir)仅3uA,漏电流极小,意味着稳压电压下仅消耗极少量电能,适合低功耗场景(如智能穿戴设备)。

4. 阻抗特性

  • 动态阻抗(Zzt):8Ω:稳压值下的交流阻抗,数值越小,稳压效果越好(输出电压受负载波动影响越小);
  • 转折区阻抗(Zzk):500Ω:器件从截止到击穿的过渡区阻抗,实际工作需避开此区域,确保处于反向击穿稳压区。

三、封装与物理特性

ZMM5237BPF采用LL-34封装,属于小型SMD封装,特点如下:

  • 尺寸紧凑:典型尺寸约1.6mm×0.8mm×0.5mm,适配高密度PCB布局(如智能手机、小型传感器);
  • 引脚结构:2引脚设计,可通过自动化贴片机快速焊接,安装便捷;
  • 散热能力:封装体积虽小,但500mW功耗匹配其散热性能,正常工作无需额外散热(需控制实际功耗不超限)。

四、典型应用场景

该稳压管因体积小、功耗低、精度适中,广泛应用于以下场景:

1. 低功耗电路稳压

为智能手环、蓝牙耳机、小型传感器模块提供稳定8.2V电压,避免电压波动影响MCU、传感器性能。

2. 基准电压源

用于ADC(模数转换器)、DAC(数模转换器)的参考电压输入,满足一般精度要求的信号采集/输出电路。

3. 过压保护

配合限流电阻并联在电路输入端,当电压超8.2V时击穿导通,钳位电压保护后级敏感元件(如单片机、运放)。

4. 简易电压调节

在低成本电源电路中替代线性稳压器,通过稳压管并联实现固定电压输出,降低电路体积与成本。

五、选型与使用注意事项

  1. 功耗控制:实际功耗=(输入电压-稳压值)×工作电流,需≤500mW。例如输入10V时,工作电流需≤277mA,需串联合适电阻限流;
  2. 工作区域确认:必须工作在反向击穿稳压区,避免正向导通(正向电压≤0.7V),否则无法稳压;
  3. 温度影响:稳压值随温度升高略有上升,高精度场景可增加温度补偿或选用更高精度器件;
  4. 并联限制:不建议多只并联(参数难完全一致),否则电流不均导致过载,需增大电流可换用功率更大的稳压管。

ZMM5237BPF凭借紧凑体积、低功耗与稳定性能,成为小型电子设备稳压/保护的实用选择,适配多数常规电路需求。

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