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Jingdao Microelectronics 1SMA4732A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic 1SMA4732A
- Type
- Jingdao Microelectronics
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- 1SMA4732A
- Electronic Component
- 1
- Package
- SMA
- Electronic Component
- Zener Diode
- Electronic Component
- 0.12g
- Electronic Component
- 1
- (Zzt)
- 8Ω
- Electronic Component
- BM0229356718
- Diode
- 1
- Current(Ir)
- 10uA@1V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 4.5V~4.93V
- Electronic Component
- 55℃~+150℃
- 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.
1SMA4732A 产品概述
一、产品简介
1SMA4732A 为晶导微电子出品的独立式稳压二极管，标称稳压值 4.7V，工作结温范围宽 (-55℃ ~ +150℃)，采用 SMA 封装，适用于各种要求稳压、基准和浪涌钳位的电子电路。该器件体积小、安装方便，适合表面贴装工艺（SMT）。
二、主要参数
- 稳压值（标称）：4.7V
- 稳压值范围：4.5V ~ 4.93V
- 反向电流（Ir）：10 μA @ 1V
- 耗散功率（Pd）：1W（器件最大耗散，实际应用需考虑封装散热条件）
- 阻抗（Zzt）：8 Ω
- 工作结温：-55℃ ~ +150℃
- 封装形式：SMA（独立式贴片）
三、产品特点
- 稳压精度适中：4.5V~4.93V 的稳压范围满足多数低压参考与稳压需求。
- 低漏电流：Ir = 10 μA@1V，有利于低功耗应用中的静态电流控制。
- 低动态阻抗：Zzt = 8 Ω，动态响应良好，有利于负载变化下维持稳压。
- 宽温度工作范围与工业级可靠性，适合苛刻环境使用。
- SMA 封装便于批量贴装与可靠焊接。
四、典型应用
- 低电压参考与基准源（小信号稳压）。
- 电源轨的局部稳压与基准补偿电路。
- 输入浪涌与过压钳位保护（配合限流电阻使用）。
- 通信、仪表及工业控制中的辅助电源与电压基准模块。
五、封装与可靠性
SMA 封装具备良好机械强度与焊接可靠性，适合回流焊工艺。尽管器件标称耗散 1W，但实际功率承受能力受 PCB 铜箔面积、散热通道及环境温度影响，应按热降额设计并留有裕量。
六、使用注意事项与推荐电路
- 作为并联稳压器使用时，应接限流电阻 R：R = (Vin - Vz) / Iz，以限制通过二极管的电流并控制功耗；二极管功耗 Pd = Vz × Iz，应保证 Pd 不超过器件额定耗散并考虑温升。
- 在高脉冲或浪涌场合，需评估能量承受能力并可外接陶瓷电容以改善瞬态响应。
- 焊接与回流过程中注意温度曲线符合封装规范，避免超温造成性能劣化。
- 器件极性通常以管身标记（阴极条）表示，请根据电路图正确安装。
如需器件样片参数曲线、封装尺寸图或推荐焊接工艺参数，可进一步联系供应商或查阅晶导微电子的技术文档。
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