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FOSAN BC846B
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- FOSAN BC846B
- Type
- FOSAN
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- FOSAN
- Electronic Component
- BC846B
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- 1 NPN
- Electronic Component
- Transistor(BJT)
- Electronic Component
- 0.034g
- Electronic Component
- 1
- Electronic Component
- BM0264881626
- Operating Temperature
- 55℃~+150℃
- Transistor Type
- NPN
- Frequency(f T)
- 100MHz
- Power Dissipation(Pd)
- 225mW
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BC846B (FOSAN 富信) — NPN 小信号三极管 SOT-23 产品概述
一、简介与型号定位
BC846B 为一颗 SOT-23 封装的小信号 NPN 双极型晶体管，由 FOSAN（富信）生产，适用于通用开关、驱动及放大场合。单颗销售（数量：1个NPN），体积小、集成度高，便于表面贴装与自动化贴片装配。
二、主要电气参数
- 晶体管类型：NPN
- 集电极电流 Ic：100 mA（最大）
- 集射极击穿电压 Vceo：65 V（最大）
- 耗散功率 Pd：225 mW（封装限制）
- 直流电流增益 hFE：450（典型/最大量程，依工作点而异）
- 特征频率 fT：100 MHz（约数，适合中高频小信号放大）
- 集射极饱和电压 VCE(sat)：0.6 V（典型/最大，在指定 Ib/Ic 条件下）
- 射基极击穿电压 Vebo：6 V（最大）
- 工作温度范围：-55 ℃ 至 +150 ℃
三、封装与引脚
封装为 SOT-23（小型三引脚），方便表面贴装。典型引脚排列（视具体封装标识）：引脚1 基极(B)、引脚2 发射极(E)、引脚3 集电极(C)。使用前请参考厂商数据手册确认引脚与标识。
四、应用场景
适用于：通用开关电路、小信号放大器、驱动低功率继电器或指示灯、接口缓冲、音频前级及高频开关电路等。高 hFE 使其在低电流增益需求下表现优异；100 MHz fT 使其可用于中频放大与信号处理。
五、设计与使用注意事项
- 功率与散热：Pd = 225 mW，SOT-23 封装散热受限，需在电路板布局上做好散热（铜箔面积）和使用稳态电流限制。
- 饱和电压与驱动：VCE(sat)≈0.6 V，驱动足够基极电流以降低饱和压降。
- 极限电压：Vceo=65 V，避免高于此值的电压应力；Vebo=6 V，基—射间电压受限。
- 温度范围广，适用于工业级环境，但在高温下增益与漏电流会变化，应留裕量。
六、检选与替代
选型时若需更高功率或更低饱和压可考虑SOT-23更大功耗或SOT-223等封装；若需更高频率或更高电流，应选择规格更强的器件。常见可比型号：BC846（系列中不同等级）、2N3904（性能、封装不同，需对比参数）。
使用前建议参考 FOSAN 官方数据手册获取详尽的典型曲线、极限值和封装图，以保证设计可靠性。
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