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Jingdao Microelectronics BZT52C4V7S
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic BZT52C4V7S
- Type
- Jingdao Microelectronics
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- BZT52C4V7S
- Electronic Component
- 1
- Package
- SOD-323
- Electronic Component
- Zener Diode
- Electronic Component
- 0.028g
- Electronic Component
- 1
- (Zzt)
- 80Ω
- Electronic Component
- BM0228061361
- Diode
- 1
- Current(Ir)
- 3uA@2V
- Power Dissipation(Pd)
- 200mW
- Electronic Component
- 4.4V~5V
- 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.
BZT52C4V7S 产品概述
一、概述与定位
BZT52C4V7S 是晶导微电子推出的一款独立式小功率稳压二极管，标称稳压值为 4.7V（实际稳压范围 4.4V–5.0V）。该器件采用 SOD-323 表面贴装封装，适用于空间受限的便携式与低功耗电路中作为基准稳压或浪涌钳位器件使用。封装小巧、价格低廉、兼容常见回流焊工艺，便于批量生产与自动贴装。
二、主要电气与热参数
- 标称稳压：4.7V（范围 4.4V ~ 5.0V）
- 反向电流 Ir：3 μA @ 2V（典型反向泄漏电流指标）
- 动态阻抗 Zzt：80 Ω（表征稳压时的小信号阻抗）
- 最大耗散功率 Pd：200 mW（结温环境下的最大允许耗散）
- 工作结温范围：-55°C ~ +150°C
根据耗散功率简单估算，器件在理想条件下的最大稳流约为 Imax ≈ Pd / Vz ≈ 200 mW / 4.7 V ≈ 42 mA。但实际设计中应考虑结温上升、PCB 铜箔散热以及长期可靠性，通常工作电流远低于该极限以降低噪声与温漂。
三、封装与热管理建议
SOD-323 为小型 SMD 封装，热阻相对较大，器件无专门散热片，推荐实现以下措施以保证长期可靠性：
- 在 PCB 布局时增加与二极管相连的铜皮面积以扩散热量；必要时加大下层铜层连通；
- 限制稳压二极管的平均耗散功率，避免长期接近 Pd 上限；采用合适的限流电阻和/或分流设计；
- 按照厂家回流曲线进行焊接，避免超温或过冲影响器件特性。
四、典型应用场景与电路建议
- 低功耗基准稳压：为微控制器或模拟前端提供 4.7V 参考电源（通常作为旁路稳压，输出电流受限）；
- 输入浪涌钳位：用于保护后级器件免受短时高压脉冲（需配合串联限流）；
- 电平译位与信号钳位：在数字或混合信号线路中作为钳位或过压保护元件。
电路使用建议（并联稳压/旁路稳压）：
- 在供电端与稳压二极管串联一个限流电阻 R：R = (Vin_max - 4.7V) / Iz，其中 Iz 取决于期望的稳压精度与噪声，且不得超过由 Pd 限定的安全电流；
- 设计时优先选择小 Iz 以降低动态阻抗引起的电压漂移与噪声；对精度要求高的场合建议改用参考源或低阻抗稳压芯片。
五、选型与可靠性注意事项
- 若电路对稳压精度、噪声或温漂敏感，BZT52C4V7S 适合用作成本敏感的简单参考，但替代方案可考虑低阻抗、高精度的线性参考器件；
- 留意器件在低电压偏压下的反向电流（3 μA @ 2V），对高阻抗测量回路可能造成影响；
- 在高环境温度或受限散热条件下，应对最大耗散功率进行降额处理，以延长寿命并保证稳定性。
总体而言，BZT52C4V7S 是一款面向低功耗、低成本应用的通用型稳压二极管，适合用于小信号稳压、钳位保护及简单参考场景。合理的电流限流与 PCB 热设计是保证其稳定工作的关键。
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