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UMW BC857B
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- UMW BC857B
- Type
- UMW
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- UMW
- Electronic Component
- BC857B
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- 1 PNP
- Electronic Component
- Transistor(BJT)
- Electronic Component
- 0.033g
- Electronic Component
- 1
- Electronic Component
- BM0229956508
- Operating Temperature
- 65℃~+150℃
- Transistor Type
- PNP
- Frequency(f T)
- 100MHz
- Power Dissipation(Pd)
- 200mW
- 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.
产品概述：BC857B 三极管
一、基本信息
BC857B 是一款由友台半导体（UMW）生产的 PNP 型三极管（BJT），采用 SOT-23-3 封装。这款三极管不仅具备小型化的优点，还在多个领域展现出高效能和稳定性。其主要电气特性包括最大功率 200mW、集射极击穿电压 45V、集电极电流 100mA 等，在实际应用中显示出良好的性能。
二、性能参数
- 功率(Pd): 200mW
- 集射极击穿电压(Vceo): 45V
- 集电极电流(Ic): 100mA
- 直流电流增益(hFE): 220@2mA,5V
- 集电极-发射极饱和电压(VCE(sat)@Ic,Ib): 500mV@100mA,5mA
- 集电极截止电流(Icbo): 100nA
- 特征频率(fT): 100MHz
- 工作温度范围: -65℃至+150℃
- 晶体管类型: PNP
- 封装形式: SOT-23-3
这些参数为 BC857B 在实际使用中提供了良好的性能保障，能够满足多种应用需求。
三、应用领域
BC857B 三极管广泛应用于各种电子电路，包括但不限于以下几个方面：
开关电路: 由于其较高的集电极电流和良好的饱和特性，BC857B 常用作开关元件，适用于电源管理和负载驱动。
放大电路: 该三极管具有较高的电流增益（hFE），能够用于信号放大电路中，帮助提高信号强度和清晰度。
音频处理: 在音频设备中，BC857B 可用于音频信号的放大与调节，以实现更高质量的音频输出。
高温环境应用: BC857B 的工作温度范围广，从-65℃到150℃，使其适合在严苛的工业环境下使用，如汽车和航空电子设备。
线性和开关模式电源: 其在高频情况下表现优秀（fT = 100MHz），使其适合用于开关电源和线性电源的设计。
四、设计注意事项
在使用 BC857B 进行设计时，有几个注意事项：
电流和电压限制: 确保在工作条件下不超过其规定的最大电流（Ic = 100mA）和电压（Vceo = 45V），以确保元件的可靠性和长期稳定性。
热管理: 即使其功率较小，但在高负载条件下仍需做好热管理，避免过热导致性能下降或元件损坏。
偏置电路设计: 在放大电路中，良好的偏置设计是保证线性工作的关键，应根据实际应用选择合理的偏置电阻。
频率响应: 在高频应用中，尽量减少 PCB 的寄生电容和电感，以保持良好的信号完整性。
五、总结
BC857B 三极管是一款性能优秀、适用面广的 PNP 型三极管，凭借其高电流增益、高频特性和宽工作温度范围，广泛应用于工业、消费电子和通信设备中。无论是在小型化设计还是在高温环境下，其稳定性和可靠性均能满足市场需求，是电子设计工程师值得信赖的选择。对于需要高效能和高可靠性的电路设计，BC857B 将是一个理想的选项。
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