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Jingdao Microelectronics 1SMA4730A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic 1SMA4730A
- Type
- Jingdao Microelectronics
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- 1SMA4730A
- Electronic Component
- 1
- Package
- SMA
- Electronic Component
- Zener Diode
- Electronic Component
- 0.062g
- Electronic Component
- 1
- (Zzt)
- 9Ω
- Electronic Component
- BM0229356776
- Diode
- 1
- Current(Ir)
- 50uA
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 3.7V~4.1V
- 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.
1SMA4730A 产品概述
一、产品简介
1SMA4730A 为晶导微电子推出的独立式稳压二极管，标称稳压值 3.9V，稳压范围 3.7V～4.1V。器件采用 SMA 表面贴装封装，面向要求体积小、成本低且需稳压参考的消费类与工业类电子产品。该型号具有低阻抗、低漏电和宽工作温度点，适合用作低电流稳压、参考电压和浪涌限制等场合。
二、主要电气参数
- 标称稳压 (Vz)：3.9V，允许范围 3.7V～4.1V
- 反向电流 (Ir)：50 μA（给定条件下，描述为 50 μA@1V）
- 动态阻抗 (Zzt)：9 Ω（在规定测试电流下测得）
- 最大耗散功率 (Pd)：1 W（实际可用功率受散热条件影响）
- 工作结温范围：-55 ℃ ～ +150 ℃
这些参数表明 1SMA4730A 能在低到中等功耗情况下提供稳定的反向稳压性能，适用于小功率稳压与电压钳位。
三、封装与机械特性
- 封装形式：SMA（表面贴装，适配自动贴装与回流焊工艺）
SMA 封装利于在有限 PCB 面积上实现稳压功能，同时便于批量生产与可靠焊接。机械与引脚布局应参照厂家具体封装图纸进行 PCB 设计与焊接工艺确认。
四、典型应用
- 低功耗稳压 / 参考电压源（作为并联稳压元件）
- 电源浪涌抑制与电压钳位保护
- 模拟与数字电路的基准电压来源
- 便携设备、传感器模块及通信设备的局部稳压
五、使用与热管理建议
- 虽然 Pd 标称为 1 W，但实际耗散受 PCB 铜箔面积、散热路径与环境温度影响显著。建议在设计时保留足够的散热铜箔并评估温升。
- 在并联使用时注意电流分配问题，避免单管过载。
- 推荐在预期最大工作电流、最大环境温度下进行热仿真或实际测量，确定安全工作裕量。
六、选型与注意事项
- 若电路要求更低的动态阻抗或更精确的稳压，应比较同系列或其他型号的 Zt、包装及测试电流条件。
- 注意 Ir 标注通常随测试电压与温度变化，关键场合应查看完整数据手册中的温度依赖与测试条件。
- 频繁的浪涌或脉冲能量场合需评估脉冲功耗能力与能量吸收能力，必要时采用更大功率或并联保护器件。
七、可靠性与存储
- 推荐按厂家建议进行回流焊温度曲线控制，避免超出封装与材料耐受范围。
- 存储应避免潮湿、高温及强腐蚀性气体环境，未使用贴片卷带宜在防潮包装内保存并在规定时间内回流。
总结：1SMA4730A 以其紧凑的 SMA 封装、3.9V 的稳压值、低阻抗与宽工作温度适合多种小功率稳压与保护场合。实际设计时，请结合完整数据手册核对测试条件与热管理要求，以确保长期稳定运行。
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