1, this is the transistor, used to control the load current output. From the outside, it looks like 6 feet, but it integrates more than one set of transistors inside. Really to determine what it is, you can open the 100m oscilloscope, the pen to measure the input foot, if the input is pure voltage, there is no doubt that it is the transistor, if there is a waveformIt is by no means a triode.
2, the sot23-3 package device model in line with this screen printing is AS431BNTR-G1. Screen printing GB6. Device function: three-terminal adjustable precision turn-off rectifier, just like the ordinary TL431. The internal reference accuracy of this model 5V is 1%.
3, Hello! The chip you are looking for should be: MCH6534, the valid code is "EG".
4, may be 1117, 3V voltage regulator output. You can search the Internet for details.
5, hello, this should be switching electricitySome charge a fee.
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The type of diode for printing 5K is MM1Z20 and the package is SOD-123. In the chip screen reverse check network, search 5K, you can find that the screen is a 5K diode onlyThere is MM1Z20, from which it can be determined that the diode printed with 5K is MM1Z20, and the package is SOD-123. For details about the parameters of the MM1Z20, see the user manual.
It is a "transient diode", which is a high-efficiency protection device in the form of a diode, effectively protecting precision components in electronic circuits from damage by various surge pulses.
Any pictures? It is best to provide a picture to send to see, so that we can accurately confirm the model for you. If it is a TVS diode, there are two TVS models of Silkscreen KE, respectively: SMBJ0A. SMF0CA.
This transient voltage suppressor, commonly known as the detonator, just connect a detonator or TVS transient suppression diode can be. Directly remove the circuit impassability, there is no way to directly connect the jumper, but there is no protection.
According to the picture you provided, we can see that it is TVS transient suppression diode, P549 is the meaning of production batch number, printing 5BFM according to TVS diode screen printing symbol query, know the specific model is: 0SMDJ33CA.
The diode with a screen print of 5250BP is a 20V 0.5W stablePressure diode, BP only represents its packaging type.
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