Electronics > Repair

Help identifying this part - 1178H

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daisizhou:

--- Quote from: fzabkar on September 07, 2024, 12:01:06 am ---3.0SMJC series are TVS diodes.

https://www.mouser.com/datasheet/2/1057/3_0SMCJ_SERIES-1865170.pdf

--- End quote ---

Please see the picture

fzabkar:
It appears to be a fixed 3-terminal 3.3V linear regulator. The pinout from left to right appears to be Ground, Vin, Vout.



daisizhou:
Very true.I found that the output port and GND resistance is only 15 ohms.
I uninstalled the 1178H and the 15 ohm disappeared.
Finally 1178H is damaged,But I still don't know what the exact model of 1178H is

fzabkar:
What is the device and what is the output port connected to?

daisizhou:

--- Quote from: fzabkar on September 07, 2024, 12:49:53 am ---What is the device and what is the output port connected to?

--- End quote ---

The sensor is connected.I don't know the details, because I didn't see the sensor appear, only the sensor interface

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