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DIOTEC BC847A
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DIOTEC BC847A
- Type
- DIOTEC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DIOTEC
- Electronic Component
- BC847A
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- 1 NPN
- Electronic Component
- Transistor(BJT)
- Electronic Component
- 0.027g
- Electronic Component
- 1
- Electronic Component
- BM0227699740
- Operating Temperature
- 55℃~+150℃
- Transistor Type
- NPN
- Frequency(f T)
- 300MHz
- Power Dissipation(Pd)
- 250mW
- 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.
BC847A（DIOTEC）产品概述
一、产品简介
BC847A 是一款通用型 NPN 双极晶体管，DIOTEC（德欧泰克）品牌，采用 SOT-23 表面贴装封装。器件针对小信号放大与开关应用进行了优化，兼具高电流增益与较快的频率响应，适合便携式与空间受限的电子设备。
二、主要电气参数
- 直流电流增益 hFE：800（典型值，Ic=2mA，VCE=5V）
- 最大集电极电流 Ic：100mA
- 集电极—射极击穿电压 VCEo：45V
- 集射极截止电流 Icbo：5µA（典型，微弱漏电流）
- 耗散功率 Pd：250mW（封装散热限制需注意）
- 特征频率 fT：300MHz（高频性能优良）
- 射基极击穿电压 Vebo：5V（注意反向基-射极电压限制）
- 集电极饱和电压 VCE(sat)：约200mV（典型，Ic=100mA，Ib=5mA）
三、性能特点与优势
- 高电流增益：在低电流工作点（约2mA）下呈现高 hFE，便于实现高增益放大器或降低基极偏置电流。
- 低饱和压降：VCE(sat) 低，适合要求低导通损耗的开关场合。
- 宽温度范围：-55℃ ~ +150℃ 的工作温度适应工业级应用。
- 良好高频特性：fT≈300MHz，适合高频小信号放大或驱动用途。
- 小型表贴封装：SOT-23 占板面积小，适合高密度 PCB 布局。
四、典型应用场景
- 小信号放大器（前置放大、差分放大等）
- 电平转换与缓冲驱动（中低功率开关）
- 模拟开关、驱动脉冲电路
- 高频放大与射频前端（受限于功率与匹配条件）
- 便携式及消费类电子设备中的通用放大/开关
五、设计与使用建议
- 功耗与热管理：Pd=250mW 为器件耗散上限，SOT-23 散热能力有限，建议在连续工作时留有裕量，必要时降低集电极电流或采用 PCB 热铜区域散热。
- 电流与增益平衡：高 hFE 在低电流时明显，随 Ic 增大增益会下降。若需稳定增益，应在电路中正确偏置并考虑温漂影响。
- 饱和驱动设计：若用于开关导通，确保基极驱动电流足够（例如典型参数中 Ib≈5mA 对应 Ic 100mA 可达到低 VCE(sat)）。
- 极限电压保护：基-射极反向电压 Vebo≈5V，避免在电路中反向施加过高电压导致损坏；VCEo=45V，要保证开关或瞬态不会超过此值。
- 漏电流注意：Icbo≈5µA 在高阻电路或高温时可能影响偏置精度，设计偏置网络时应考虑漏电流对静态点的影响。
六、封装与选型注意
SOT-23 表面贴装适合自动化生产与空间受限场合。选型时，应综合考量工作电流、功耗、频率需求及散热条件；若需要更大功率或更高电流能力，应考虑更大封装或功率型晶体管。购买时请确认供应商型号、批次与具体参数的一致性，并参考器件详尽数据手册以获取完整的极限值和典型性能曲线。
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