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ROHM EDZVFHT2R4.7B
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- ROHM EDZVFHT2R4.7B
- Type
- ROHM
- Unit
- Electronic Component
- Minimum package
- 8000
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ROHM
- Electronic Component
- EDZVFHT2R4.7B
- Electronic Component
- 1
- Package
- SC-79(SOD-523)
- Electronic Component
- Zener Diode
- Electronic Component
- 0.05g
- Electronic Component
- 1
- (Zzk)
- 800Ω
- (Zzt)
- 100Ω
- Electronic Component
- BM0229970491
- Diode
- 1
- Current(Ir)
- 2uA@1V
- Power Dissipation(Pd)
- 150mW
- Electronic Component
- 4.55V~4.75V
- Electronic Component
- 8000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
EDZVFHT2R4.7B 产品概述
一、概述
EDZVFHT2R4.7B 是 ROHM（罗姆）推出的一款低功耗稳压二极管，稳压值标称 4.7V（规格范围 4.55V〜4.75V），单个独立封装，适合做小电流的参考电压或过压钳位。器件以 SC-79 (SOD-523) 超小型表面贴装封装提供，适用于空间受限和移动电源设计。
二、主要电气参数
- 稳压值：4.55V ~ 4.75V（名义 4.7V）
- 反向电流 Ir：2 μA @ 1V
- 耗散功率 Pd：150 mW
- 动态阻抗 Zzt：100 Ω（在测试电流条件下）
- 膝部阻抗 Zzk：800 Ω（表示低电流区的阻抗特性）
三、性能解读与设计要点
由于 Pd=150 mW，理论最大稳压电流约为 Pd/Vz ≈ 150 mW / 4.7 V ≈ 31.9 mA。但实际应用中应留有裕度并考虑封装散热限制，典型稳态工作电流常控制在数 mA 级以保证稳定性与寿命。Zzt 值越小，输出随电流变化越稳定；Zzk 较大表明在非常低电流时稳压特性进入膝区，电压变化较敏感。
四、典型应用与选型建议
适合用作：低功耗参考电压、传感器供偏、基准源、简单的电压钳位或浪涌吸收。选型时若需更精确参考或更大电流，应选用更高功率或低阻抗型号；对温度漂移和噪声有严格要求的场合建议采用专用电压参考芯片。
五、典型电路与计算示例
常用的稳压电路为串联限流电阻 R 与稳压二极管并联负载：R = (Vin − Vz) / Iz。
示例：若 Vin=12V，要给稳压管 5 mA 工作电流，则 R = (12 − 4.7) / 0.005 ≈ 1.46 kΩ，同时检查稳压管耗散 Pd = Vz × Iz ≈ 4.7 × 0.005 = 23.5 mW，远低于额定 150 mW，有足够余量。
六、封装与工艺注意
SC-79 (SOD-523) 为微小 SMD 封装，焊接时注意焊接热量与回流曲线，避免过热导致元件性能变化。存储和装配过程中应注意静电防护和潮湿敏感度，具体焊接谱和工艺参数建议参照 ROHM 官方数据手册。
若需完整电气特性曲线、温度系数或封装机械尺寸，请参阅 ROHM 的产品资料与规格书以获得详细的测试条件和典型曲线。
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