The Darlington Bipolar Power Transistor is designed for general-purpose amplifier and low speed switching applications. TIP120, TIP121, TIP122 (NPN); TIP125, TIP126, TIP127 (PNP) are complementary devices.
The 2N3906 Is 40V 200mA 625mW PNP Bipolar Transistor is designed for use in linear and switching applications. The device is housed in the TO-92 package, which is designed for medium power applications
This is an Active buzzer is present inside with shock source, so as long as the electricity will call 2 Program control convenient, single chip microcomputer a high and low level can make the sound, and the passive buzzer is can not do.
The 2SA1013, 2SA-1013 is a PNP epitaxial silicon transistor, it uses UTC’s advanced technology to provide the customers with high DC current gain, etc. The 2SA1013 is suitable for power switching and color TV vertical deflection output, etc.