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Jingdao Microelectronics 1SMA4753A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic 1SMA4753A
- Type
- Jingdao Microelectronics
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- 1SMA4753A
- Electronic Component
- 1
- Package
- SMA
- Electronic Component
- Zener Diode
- Electronic Component
- 0.12g
- Electronic Component
- 1
- (Zzt)
- 50Ω
- Electronic Component
- BM0230630720
- Diode
- 1
- Current(Ir)
- 5uA@27V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 34.2V~37.9V
- 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.
1SMA4753A 产品概述
一、主要特性
1SMA4753A 是晶导微电子出品的独立式稳压二极管（SMA 封装），设计用于对中高电压回路提供稳压和过压钳位保护。器件标称稳压值为 36V，典型电气特性稳定，反向漏电低，适合在空间受限的表面贴装应用中作为稳压源或过压保护元件。
二、典型电气参数
- 稳压值（标称）：36V
- 稳压值范围：34.2V ~ 37.9V
- 反向电流 Ir：5μA @ 27V（低漏电，利于保持高阻态功耗低）
- 阻抗 Zzt：50Ω（表示在规定测试电流下的动态阻抗特性）
- 最大耗散功率 Pd：1W（SMA 封装，需注意热管理）
- 工作结温范围：-55℃ ~ +150℃
- 器件配置：独立式（独立的单体稳压二极管）
- 封装：SMA（表面贴装）
三、典型应用
- 对 36V 级电源的辅助稳压或基准电压场合
- 过压钳位保护：电池管理、充电器、通信线路、工业控制电源等
- 抗浪涌/瞬态抑制（结合限流电阻或阵列设计）
- 嵌入式设备中作为简单可靠的分流稳压方案
四、封装与热管理
SMA 封装体积小、焊接可靠，但散热能力有限。Pd=1W 为器件在推荐环境下的最大额定耗散，实际应用中应针对环境温度和 PCB 铜箔面积进行热降额设计。建议在参考原厂热阻曲线下选择合适的 PCB 散热面和过孔布局，以保证结温不超过额定范围。
五、布局与焊接建议
- 遵循厂方推荐的 SMA PCB 封装尺寸，保证焊盘焊膏厚度和回流温度曲线合规；
- 在器件附近增加铜箔面积，必要时并联热过孔以改善散热；
- 对于持续大电流或高温工况，尽量通过外部限流和分流方式降低二极管自身耗散；
- 焊接后建议进行目视检查与在线测试，确认焊点良好且稳压值正常。
六、选型与使用注意事项
- 稳压值范围表明在不同批次与测试条件下会有一定浮动，关键应用建议留有裕量；
- 反向电流在 27V 时为 5μA，若系统对漏电敏感，请在电路设计中考虑漏电引起的影响；
- 动态阻抗 50Ω 表示在调节回路中存在一定的压降和响应特性，不宜用作高精度参考源；
- 对于脉冲浪涌或高能瞬态，需参考最大冲击电流规格并采用相应防护措施（如串联限流电阻、吸收元件等）。
七、品质与可靠性
晶导微电子出品，SMA 封装适合大批量表贴生产。建议在最终设计前参考厂方完整数据手册（包括温度特性曲线、热阻、极限参数与浪涌能力），并在目标环境下进行温升和长期老化试验，以验证稳压性能和可靠性满足产品寿命要求。
总结：1SMA4753A 为一款适用于 36V 级电路的独立式稳压二极管，具有低漏电、明确稳压范围和便于表贴安装的特点。合理的热设计与限流保护能有效提升其在实际系统中的稳定性与寿命。
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