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ST ZMM18 Zener diode ZMM18
Configuration
1 options
Configuration
22+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST ZMM18
- Type
- ST
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ST
- Electronic Component
- ZMM18
- Electronic Component
- 1
- Package
- LL-34
- Electronic Component
- Zener Diode
- Electronic Component
- 0g
- Electronic Component
- 1
- Power(Pd)
- 500mW
- (Zzt)
- 50Ω
- Electronic Component
- Zener Diode
- Electronic Component
- BM0264871459
- Current(Ir)
- 100nA@13V
- Electronic Component
- 16.8V~19.1V
- Electronic Component
- Electronic Component
- Electronic Component
- 2500
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
ZMM18稳压二极管产品概述
一、产品基本识别
ZMM18是ST（先科） 推出的表面贴装稳压二极管，属于ZMM系列常规稳压管。核心标识为型号“ZMM18”，封装采用LL-34（SOD-80） 小型表面贴装结构，体积紧凑，适配高密度PCB设计。作为稳压二极管，它通过反向击穿特性实现电压稳定，广泛应用于对稳压精度要求适中的电子电路中。
二、核心电气参数详解
1. 最大耗散功率（Pd）：500mW
该参数定义了器件连续工作时允许的最大功耗，超过此值会导致内部过热、永久损坏。实际应用需通过串联限流电阻控制电流：稳压值18V时，最大安全电流约为500mW÷18V≈27.8mA，需确保电路中电流不超过此值。
2. 反向漏电流（Ir）：100nA@13V
反向偏置13V时，漏电流仅100nA——漏电流越低，反向绝缘特性越好，可减少静态功耗，尤其适用于低功耗电路（如电池供电的便携设备）。
3. 稳压值（Vzt）：标称18V，范围16.8V~19.1V
标称稳压值为18V，生产公差覆盖16.8V~19.1V，满足大部分常规稳压需求。需注意：实际稳压值会随工作电流略有波动，但该范围可覆盖多数应用场景的精度要求（如±5%以内的稳压需求）。
4. 动态阻抗（Zzt）：50Ω
动态阻抗是稳压管的核心性能指标，反映输入电压/负载变化时输出电压的波动程度。50Ω的动态阻抗属于常规稳压管的合理水平，可保证电路稳压效果稳定，适用于非高精度稳压场景。
三、封装与物理特性
LL-34（SOD-80）封装为表面贴装型，具备以下优势：
- 体积紧凑：尺寸适配小型化设备（如便携仪器、智能传感器）；
- 集成度高：引脚间距小，支持高密度PCB布局；
- 焊接兼容：适配回流焊、波峰焊等自动化工艺，便于批量生产；
- 散热适配：封装热阻适中，结合500mW功率限制，可满足常规散热需求（无需额外散热片）。
四、典型应用场景
- 基准电压源：为传感器、运算放大器提供18V参考电压，保证信号采集/放大精度；
- 简单稳压电路：配合限流电阻，将不稳定直流电压稳定在18V左右，适用于小型电源模块；
- 过压保护辅助：反向并联于电路中，当输入电压超稳压值时导通，限制电压波动，保护后级器件；
- 便携设备电源：适配电池供电的低功耗设备，提供稳定18V工作电压，延长电池续航。
五、品牌与可靠性说明
ST（先科）作为国内电子元器件知名品牌，ZMM系列稳压管以参数一致性好、可靠性高著称。ZMM18经过严格生产测试，反向漏电流稳定、动态阻抗一致性达标，适合批量应用于消费电子、工业控制、汽车电子（非高压场景）等领域。
综上，ZMM18是一款性价比高、适配性强的常规稳压二极管，可满足多数电子电路的基础稳压需求。
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