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CJ MMSZ5231BS
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ MMSZ5231BS
- Type
- CJ
- Minimum package
- 3000
Technical parameters
- Electronic Component
- CJ
- Electronic Component
- MMSZ5231BS
- Electronic Component
- 1
- Package
- SOD-323
- Electronic Component
- Zener Diode
- Electronic Component
- 0.029g
- Electronic Component
- 1
- (Zzk)
- 1.6kΩ
- (Zzt)
- 17Ω
- Electronic Component
- BM0228197310
- Diode
- 1
- Current(Ir)
- 5uA
- Power Dissipation(Pd)
- 200mW
- Electronic Component
- 4.85V~5.36V
- Electronic Component
- 3000
- Electronic Component
- 5.1V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MMSZ5231BS 产品概述
一、产品简介
MMSZ5231BS 为独立式稳压（二极管）器件，标称稳压值 5.1V，典型用于低功耗小型电路的基准或过压钳位。由 CJ（江苏长电/长晶）供应，SOD-323 小型贴片封装，适合空间受限的便携或消费电子产品。
二、主要参数
- 标称稳压值：5.1V（范围 4.85V ~ 5.36V）
- 反向电流 Ir：5 µA（给定条件下）
- 耗散功率 Pd：200 mW（环境、PCB 散热依赖）
- 动态阻抗 Zzt：17 Ω（测试点，反映稳压区斜率）
- 膝部阻抗 Zzk：1.6 kΩ（低电流区特性）
- 封装：SOD-323（小尺寸表贴）
三、特性解读
- 精度与噪声：4.85–5.36V 的范围表明该器件为一般精度稳压，用作参考电压时精度有限（约 ±5% 级别），不适合高精度基准场合。
- 动态阻抗 17 Ω 表明在测试电流附近，电压随电流变化较明显：ΔV ≈ Zzt·ΔI（例如 ΔI=10 mA 对应 ΔV≈170 mV）。
- 膝部阻抗较大（1.6 kΩ），意味着在很小电流下稳压特性不理想，需保证工作电流进入稳压区以获得稳定电压。
- 低反向漏电（5 µA）有利于并联高阻负载，但在高阻测量或极低电流电路中仍需考虑其影响。
四、使用与选型建议
- 最大允许电流（理论）：Iz_max ≈ Pd / Vz ≈ 0.2W / 5.1V ≈ 39 mA（此值为理想散热条件下理论上限，实际使用应降额）。建议稳态工作电流选在几毫安到十多毫安范围以兼顾稳定性与温升。
- 串联限流电阻计算示例：若 Vin=12V，目标 Iz=10 mA，则 R ≈ (12V−5.1V)/10 mA ≈ 690 Ω（取标准 680 Ω），电阻功耗约 69 mW，二极管功耗约 51 mW。
- 若需更稳定参考，考虑并联旁路电容（如 0.01–0.1 µF）以降低噪声与瞬态响应。
- 对低功耗和高阻输入电路注意泄漏电流影响，必要时添加缓冲放大器。
五、封装与热管理
SOD-323 为小型表贴封装，体积小但散热能力受限。为保证 200 mW 的耗散能力，应在 PCB 上提供适当铜箔散热、短走线并考虑局部铜层增大。在高环境温度或连续高电流条件下需降额使用。
六、典型应用
- 低功耗稳压/参考源（小电流负载）
- 信号钳位／保护电路
- 电源监测或过压限制（非精密参考）
总结：MMSZ5231BS 在体积和成本受限的情况下可提供可靠的 5.1V 级稳压与钳位功能，但受限于精度、动态阻抗和封装散热，选型与电路设计需考虑工作电流、降额和 PCB 热处理。
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