SMD Transistor Function and requirements

An important parameter of a triode is the current amplification coefficient β。 When a small current is applied to the base electrode of a triode, an injection current can be obtained at the collector electrode β Times the current, that is, the collector current. Moreover, a small change in the base current can cause a significant change in the collector current, which is the amplification effect of the SMT transistor. The triode can also be used as an electronic switch, and in conjunction with other electronic components, it can also form an oscillator. During replacement, it is necessary to understand the performance (whether it is a general-purpose transistor, a switching transistor, etc.), structure (such as Darlington transistor, bandgap transistor, or a combination transistor) of the original tube (or the required tube), or special requirements (such as high back pressure, low noise, etc.), and some main parameters, and then find the same performance, function, structure, and parameters from the manual (or company data manual) for testing or replacement. In addition, Note that the operating frequency (MF, HF, VHF, or UHF, etc.) should be selected to meet the requirements of the operating frequency. BC807,BC817