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ON MMSZ27T3G
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
18
specifications
Core information
- Product name
- ON MMSZ27T3G
- Type
- ON
- Minimum package
- 10000
Technical parameters
- Electronic Component
- ON
- Electronic Component
- MMSZ27T3G
- Electronic Component
- 1
- Package
- SOD-123
- Electronic Component
- Zener Diode
- Electronic Component
- 0.58g
- Electronic Component
- 1
- (Zzt)
- 80Ω
- Electronic Component
- BM0257636002
- Diode
- 1
- Current(Ir)
- [email protected]
- Power Dissipation(Pd)
- 500mW
- Electronic Component
- 25.65V~28.35V
- Electronic Component
- 10000
- Electronic Component
- 27V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MMSZ27T3G 产品概述
一、概述
MMSZ27T3G 是 ON Semiconductor（安森美）推出的一款独立式稳压二极管，标称稳压值为 27V，最大耗散功率 500mW，封装为 SOD-123，适合用于低功耗的基准源、纹波抑制与过压保护等应用场景。该器件以体积小、功耗适中、工艺可靠为特点，便于表面贴装和批量生产装配。
二、主要参数
- 稳压值（标称）：27V
- 稳压值（范围）：25.65V ~ 28.35V
- 反向电流 Ir：50 nA @ 18.9V（在该电压下的泄漏电流）
- 阻抗 Zzt：80 Ω（动态阻抗，影响稳压时的电压纹波）
- 耗散功率 Pd：500 mW（最大允许耗散）
- 封装：SOD-123（表面贴装小型封装）
- 器件类型：独立式稳压二极管（离散元件）
三、电气性能解读
在稳压工作区，Zener 电压会随电流和温度变化。阻抗 Zzt=80 Ω 表明在小信号电流变化时，电压会有一定幅度的摆动，适合用于对精度要求不极高的参考或保护场合。Pd=500 mW 限制了通过稳压二极管的最大电流；在 27V 条件下，理论最大持续电流约为 500mW/27V ≈ 18.5 mA，实际设计应留余量并考虑环境温度导致的热降额。反向漏电流在较低电压下为纳安级，但随温升会增加，应在高温应用中注意其对弱信号电路的影响。
四、典型应用
- 低功耗基准电压源与偏置电路
- 过压保护（对敏感节点提供钳位）
- 信号链的电压钳位与简单稳压（与串联电阻配合使用）
- 便携设备与通信模块中占板面积小的保护元件
五、设计与封装注意事项
- 热管理：SOD-123 封装体积小，散热能力有限。若工作电流接近最大耗散，须通过串联限流电阻、合理布线或散热铜皮来降低结温。
- 串联电阻计算：在做基于分流的稳压时，应根据输入电压范围、负载电流与允许耗散计算串联电阻，避免器件过热。
- PCB 布局：靠近被保护或参考节点放置，短回路路径。为改善散热与稳压稳定性，可在元件底部和焊盘处增加散热铜箔。
- 温度与漏电流：高温环境下漏电流会上升，对高阻抗电路或微安级偏置时需评估影响。
六、可靠性与选型建议
MMSZ27T3G 适用于对稳压精度要求中等、需要小尺寸表贴解决方案的场合。选型时应关注稳压值的容差范围（25.65V–28.35V）、动态阻抗与工作温度下的漏电特性。若电路中要求更低噪声或更精确稳定值，可考虑更高功率或更低阻抗的参考源；若只用于瞬态钳位或过压保护，本型号因其小巧和成本优势常为合适选择。采购时请确认原厂型号 MMSZ27T3G、封装 SOD-123 及相关批次的曲线与测试条件，以确保与实际应用一致。
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