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ST 1N4738APF Zener diode 1N4738APF
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST 1N4738APF
- Type
- ST
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ST
- Electronic Component
- 1N4738APF
- Electronic Component
- 1
- Package
- DO-41
- Electronic Component
- Zener Diode
- Electronic Component
- 0.224g
- Electronic Component
- 1
- (Zzk)
- 700Ω
- (Zzt)
- 4.5Ω
- Electronic Component
- BM0264213247
- Current(Ir)
- 10uA@6V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 7.79V~8.61V
- 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.
1N4738APF稳压二极管产品概述
一、产品基本身份识别
1N4738APF是ST（先科）推出的轴向引线稳压二极管，核心功能为提供稳定的8.2V电压基准或过压保护。该器件采用DO-41经典封装，符合无铅环保标准，且以编带形式包装适配自动化生产。作为电子电路中常用的基础稳压器件，其型号明确标识了核心参数与工艺特性，是中小功率电路设计的常规选择。
二、核心电参数详解
关键电参数直接决定应用场景与性能，具体解析如下：
- 稳压值特性：标称稳压值8.2V，实际工作范围7.79V~8.61V（±5%精度），源于击穿电压受温度、电流的轻微影响，满足普通电路对电压稳定度的需求；
- 反向漏电流：反向电压6V（未击穿）时仅10μA，漏电流极小，静态功耗低，适合对功耗敏感的电路；
- 最大耗散功率：额定1W，稳压状态下最大允许电流约122mA（I=Pd/Vz≈1W/8.2V），支撑中小负载需求；
- 动态阻抗：稳压区Zzt=4.5Ω（电流变化对电压的影响小，稳定度高），反向截止区Zzk=700Ω（进一步验证低漏电流）。
三、封装与工艺特性
DO-41封装的优势适配多场景需求：
- 安装便捷：通孔焊接，适配传统PCB设计，无需特殊工艺；
- 尺寸紧凑：直径约2.7mm、长度约5.2mm（行业常规），节省电路空间；
- 环保无铅：符合RoHS标准，避免铅污染，适配出口及高端产品；
- 编带包装：1000片/编带，适合自动化贴装，提高量产效率。
四、典型应用场景
1N4738APF凭借稳定参数，广泛用于：
- 电压基准：为单片机、ADC、运放提供8.2V参考电压，确保信号准确；
- 过压保护：输入电压超8.2V时击穿导通，钳位电压保护后级敏感电路（如传感器、低功耗芯片）；
- 简单稳压：配合限流电阻，将输入电压调整至8.2V，适配小型电源模块；
- 信号钳位：模拟链路中限制信号幅度，防止过冲导致失真或损坏（如音频、传感器调理）。
五、产品优势与适配性
该器件核心优势在于性能均衡、成本可控：
- 精度与阻抗匹配普通电路需求，无需高精度器件增加成本；
- 低漏电流+1W功耗适配中小功率，避免大功率器件的体积浪费；
- DO-41封装兼顾小批量试产与大规模量产；
- ST品牌一致性好，可靠性高，降低设计风险。
适配电路包括：小型开关电源辅助电源、单片机参考电压、工业传感器调理、消费电子过压保护等。
总结：1N4738APF是性价比突出的稳压二极管，以稳定参数、可靠工艺成为稳压、基准与保护场景的常规选择，适用于原型开发到量产的全流程应用。
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