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Jingdao Microelectronics 1SMA4737A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic 1SMA4737A
- Type
- Jingdao Microelectronics
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- 1SMA4737A
- Electronic Component
- 1
- Package
- SMA
- Electronic Component
- Zener Diode
- Electronic Component
- 0.062g
- Electronic Component
- 1
- (Zzt)
- 4Ω
- Electronic Component
- BM0229356811
- Diode
- 1
- Current(Ir)
- 10uA@5V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 7.12V~7.88V
- 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.
1SMA4737A 产品概述
一、产品简介
1SMA4737A 是晶导微电子推出的一款独立式稳压二极管（Zener Diode），标称稳压值 7.5V，允许范围 7.12V～7.88V。该器件采用 SMA 封装，额定耗散功率 Pd=1W，适合于 板级稳压、基准源及保护电路等要求体积小、可靠性高的场合。
二、主要电气参数
- 稳压值（标称）：7.5V（典型区间 7.12V～7.88V）
- 反向电流 Ir：10 μA @ 5V（指在 5V 反向偏置下的漏电流）
- 阻抗 Zzt：4 Ω（小信号动态阻抗，用于评估纹波抑制能力）
- 工作结温：-55℃～+150℃
- 耗散功率 Pd：1W（在良好散热条件下的最大稳态功耗）
三、性能亮点
1SMA4737A 在小封装下提供稳定的电压参考和过压钳位功能。低阻抗特性有利于在中小电流范围内实现较好的稳压效果；宽温度范围保证了在苛刻环境下的参数稳定性。SMA 封装便于自动贴装和手工焊接，适用于空间受限的工业与消费类电子产品。
四、典型应用
适用于低功耗电源参考、信号线电压钳位、局部稳压模块、便携式设备供电保护、电池管理辅助稳压等场景。也常用于对电压精度要求不高但需可靠限压的外围保护电路。
五、封装与焊接注意事项
SMA 封装体积小、热阻较大，需在 PCB 设计时考虑散热铜箔面积和热通孔，以利于耗散功率的释放。推荐在焊接时遵循厂家热工规范，避免过长时间的高温暴露以保护器件的长期可靠性。
六、使用建议
- 在接近额定 Pd 工作时，应做功率降额设计并增加散热面积。
- 对于精密参考，应搭配合适的偏流源以使稳压二极管工作在规定测试电流区间，减小温漂与噪声影响。
- 在脉冲或瞬态工况下，注意峰值功率限制，必要时并联限流或吸收元件。
七、可靠性与选型提示
该型号适合在-55℃至+150℃的宽温区间工作，适用于高可靠性场合。选型时除电压、功耗、封装外，还应关注实际工作电流、纹波含量及环境散热条件，确保长期稳定运行。
如需器件样片、封装图或更详细的温升与动态阻抗测试曲线，可联系晶导微电子获取数据手册与应用支持。
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