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ST MMBT3906 transistor MMBT3906
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST MMBT3906
- Type
- ST
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ST
- Electronic Component
- MMBT3906
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- 1 PNP
- Electronic Component
- Transistor(BJT)
- Electronic Component
- 0.028g
- Electronic Component
- 1
- Electronic Component
- BM0225730503
- Transistor Type
- PNP
- Frequency(f T)
- 250MHz
- Power Dissipation(Pd)
- 350mW
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
- Collector Current(Ic)
- 200mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MMBT3906 产品概述
一、产品简介
MMBT3906 是一款常用的小信号 PNP 晶体管，ST（先科）品牌 SOT-23 封装版本适用于表面贴装电路。器件强调低电流泄漏、较高的频率响应以及适中的功耗等级，适合开关和小信号放大等通用场合。
二、主要参数与特性
- 极性：PNP
- 直流电流增益 hFE：约 100（测量条件 10 mA、VCE≈1 V）
- 集电极电流 Ic 最大值：200 mA（瞬时或短时限值，参考厂商限流）
- 集-射击穿电压 VCEo：40 V
- 集电极截止电流 Icbo：50 nA（典型低漏电）
- 特征频率 fT：250 MHz（适合 VHF 范围的小信号放大）
- 集射极饱和电压 VCE(sat)：约 400 mV（饱和导通时指标）
- 射-基击穿电压 Vebo：6 V
- 功耗 Pd（封装限定）：约 350 mW（SOT-23，受 PCB 散热影响）
三、典型应用
- 高频、小信号放大器和推挽级。
- 高频或低功耗无线电前端的射频开关/缓冲。
- 作为高端（正电源侧）开关或复位电路中的 PNP 开关管。
- 通用信号级电平转换、驱动小继电器或指示灯（在允许的 Ic、Pd 范围内）。
四、使用与注意事项
- 驱动与饱和：线性放大时可按 hFE≈100 估算基极电流；用于开关时建议采用强制 β（例如 10–20）以确保可靠饱和，避免发热。
- 散热限制：SOT-23 封装功耗受 PCB 铜箔和环境限制，长时间工作在 Pd 上限会导致结温上升，需在电路板布局时预留散热面积。
- 反向 VBE 限制：基极反偏超出 Vebo（6 V）会损坏器件，设计时应防止反向基极电压过大。
- 低漏电：Icbo 约 50 nA，适合要求低泄漏的电路，但在高温下泄漏会增加，应验证工作温度范围。
五、封装与引脚
- 封装：SOT-23（小型 SMD），适合自动贴片与回流焊工艺。
- 常见引脚排列（厂商封装请以数据手册为准）：1=E（发射极）、2=B（基极）、3=C（集电极）。
六、替代与选型建议
- 2N3906（与 MMBT3906 功能等效，常见为直插封装）可作为功能替代，但要注意封装和热特性差异。
- 选型时关注 VCEo、Ic、Pd 与工作频率（fT），对功耗或高频要求更高的场合可考虑功率更大或 fT 更高的器件。
七、总结
MMBT3906（ST 版本，SOT-23）是一款性能均衡的 PNP 小信号晶体管，适合高端开关、低功耗放大及一般信号处理应用。设计时应考虑 SOT-23 的散热限制、基极反向电压约束及在饱和工作下的基极驱动要求，以确保可靠性和长期稳定工作。若需更详细的温度系数、极限值与波形测试，建议参考 ST 官方数据手册。
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