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MDD BZT52C27S
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MDD BZT52C27S
- Type
- MDD
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MDD
- Electronic Component
- BZT52C27S
- Electronic Component
- 1
- Package
- SOD-323
- Electronic Component
- Zener Diode
- Electronic Component
- 0.028g
- Electronic Component
- 1
- (Zzt)
- 70Ω
- Electronic Component
- BM0264866553
- Diode
- 1
- Current(Ir)
- 100nA
- Power Dissipation(Pd)
- 200mW
- Electronic Component
- 25.1V~28.9V
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BZT52C27S 产品概述
一、产品简介
BZT52C27S（MDD）是一款独立式小功率稳压二极管，标称稳压值27V，采用SOD-323表面贴装封装。该器件为低功耗、体积小巧的稳压参考元件，适用于空间受限、对稳压精度要求不高的保护与基准应用场景。器件在反向偏置工作时提供稳定的电压钳位，常用于低电流稳压、浪涌限制和信号线保护等。
二、主要参数与特点
- 稳压值（标称）：27V
- 稳压值范围：25.1V ~ 28.9V（器件生产公差）
- 反向电流 Ir：100nA @ 21V（典型漏电表现，随温度上升会增加）
- 耗散功率 Pd：200mW（连续工作最大耗散）
- 阻抗 Zzt：70Ω（动态阻抗，表示小信号时电压随电流变化的敏感度）
- 封装：SOD-323（小型SMD，适合高密度贴装）
- 品牌：MDD
三、电气特性解读
- 标称27V稳压意味着在指定测试电流下器件约为27V，但实际生产值可在25.1~28.9V范围内波动，因此不适合用作高精度基准。
- 动态阻抗70Ω偏大，表明电压随电流变化明显，需通过外部限流（串联电阻）稳定工作点。
- 200mW 的耗散功率限制了允许的稳压电流：在理想情况下 Iz_max ≈ Pd / Vz ≈ 0.2W / 27V ≈ 7.4mA。实际使用中应留有裕量并考虑PCB散热和环境温度的影响。
- 极低的反向漏电（100nA@21V）适合低静态电流应用，但该数据为特定测试条件下的典型值，温升或偏压改变时会增加。
四、应用建议与典型电路
- 典型用途：作为27V电平的浪涌/过压钳位、偏压源、参考电压（低精度）以及小电流保护器件。
- 设计提示：使用系列限流电阻R = (Vin - Vz) / Iz_set来确定稳压电流，Iz_set不要接近Iz_max以避免超过Pd；例如在设计时通常把工作电流控制在Iz_max的50%以下以提升可靠性。
- 若用于信号线路保护，应注意瞬态能量和峰值电流，必要时配合功率更大的抑制器或吸收网络。
五、封装与可靠性提示
- SOD-323 封装体积小，散热能力有限，焊盘与布线应有利于热量向铜箔扩散，必要时采用加铜或散热孔。
- 极性识别：SOD-323通常以阴极一侧有标记（带或线）区分，具体标识请参见供应商封装图。
- 环境与温度对漏电、稳压值和耗散功率影响显著，长期高温运行应进行功率降额处理并参照厂商温度特性曲线。
六、选型注意事项
- 若需更高稳压精度或更低动态阻抗，应选择额定功率更高或精密型稳压二极管/基准源。
- 关注器件的实际稳压范围（25.1~28.9V），确保电路容忍该偏差。
- 在存在大电流浪涌或较高环境温度的场合，优先考虑功率裕量更大的封装或并联/替代保护方案。
- 最终设计前建议参考 MDD 原厂数据手册，获取完整的I-V曲线、温度系数和可靠性测试资料。
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