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DIOTEC MMSZ5237B
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DIOTEC MMSZ5237B
- Type
- DIOTEC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DIOTEC
- Electronic Component
- MMSZ5237B
- Electronic Component
- 1
- Package
- SOD-123F
- Electronic Component
- Zener Diode
- Electronic Component
- ±5%
- Electronic Component
- 0.028g
- Electronic Component
- 1
- (Zzt)
- 8Ω
- Electronic Component
- BM0227699739
- Diode
- 1
- Power Dissipation(Pd)
- 500mW
- Electronic Component
- 7.8V~8.61V
- Electronic Component
- 50℃~+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.
MMSZ5237B 产品概述
一、主要参数与特性
MMSZ5237B（DIOTEC 品牌，SOD-123F 封装）是一款小功率稳压二极管，标称稳压值 8.2V，实测稳压范围约为 7.8V~8.61V，允许精度为 ±5%。最大耗散功率 Pd 为 0.5W（在额定条件下），动态阻抗 Zzt 约为 8Ω（在规定测试电流下测得），工作结温范围为 -50℃ 到 +150℃。该器件适用于低功耗稳压、基准源与浪涌/瞬态钳位场合。
二、封装与热特性
SOD-123F 为表面贴装小型封装，体积小、适合集成电路板密集布线。由于功耗仅 0.5W，热阻较高，实际应用时需重视 PCB 散热：尽量靠近较大铜箔面积或接地平面，并保证短宽的焊盘连线以降低结温升高。器件在高环境温度下应按厂商降额曲线进行功率降额，避免长期工作在极限 Pd 下。
三、典型应用
- 低功耗稳压：为小电流模拟电路、指示灯或参考源提供稳定 8.2V 电压。
- 电平保护/浪涌吸收：对信号线或电源线提供过压钳位保护。
- 模拟/ADC 参考：作为外部基准（需配合低噪声供电与旁路电容）。
- 功率管理与偏置电路：小电流偏置或温度补偿电路中常用。
四、使用与选型建议
- 偏置电阻计算：R = (Vin − Vz) / Iz，选择 Iz 使稳压管工作在其稳压区且耗散功率 Pz = Vz×Iz ≤ Pd。例：若 Vin=12V，希望 Iz≈10mA，则 R≈380Ω，Pz≈82mW，满足安全范围。
- 器件限流与稳压精度：为了降低噪声与温度漂移，优选在靠近中等 Iz（几 mA 至十几 mA）范围内工作；避免接近最大 Pd 持续运行。
- 旁路与滤波：在稳压二极管两端并联适量陶瓷或钽电容（10nF–1µF）可抑制瞬态和减少震荡。
- ESD 与焊接：遵循静电防护规程，SOD-123F 一般按标准回流焊工艺，注意湿度敏感等级与回流曲线。
五、可靠性与装配注意
- 避免在超出结温范围或过载情况下长期使用，关注 PCB 布局对散热的影响。
- 对于关键精度场合，建议进行筛选或匹配，并在电路中加入温度校正措施。
- 出厂规格受测试条件影响，实际设计时参考 DIOTEC 的完整数据手册以获取温度系数、稳压电流曲线和降额信息。
总结：MMSZ5237B 提供稳定的 8.2V 基准与良好的冲击钳位能力，适合各种小功耗稳压与保护场景。合理的偏置、良好的散热与旁路设计能显著提升稳定性与使用寿命。
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