Author Topic: Identifying components thread  (Read 1963 times)

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Offline psysc0rpi0nTopic starter

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Identifying components thread
« on: February 13, 2024, 12:01:14 pm »
I searched the forum for a global thread to post pictures of components we need to to identify. I couldn't find one.
Maybe this could be a single mega thread with that purpose instead of having multiple small threads for each one of us needing help!

I have removed a few components from a smoking machine and many of these components are SMD, therefore, minimal description / references are on top of these components.

Here is a picture of a few I need help to identify
 

Offline Jwillis

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Re: Identifying components thread
« Reply #1 on: February 13, 2024, 07:02:48 pm »
Most of the time many components can be identified easily.What you need to know is what package is used. Exact dimensions and footprint are crucial. Larger packages may have a manufacturer logo that can narrow down the search. Model numbers will be the first to appear after logo most of the time.
There are resources that will help. 
                       https://smd.yooneed.one/
                       https://www.s-manuals.com/smd
                       https://www.sos.sk/pdf/SMD_Catalog.pdf
There are others.

Where the component  used in a circuit is very important. Other components it's connected to, in circuit, can help identify it purpose. Circuit diagrams of the device help a lot if available. Drawing out a picture of the copper traces to each pin and any components connected to those traces. Photos of both the Front and Back of the circuit board. 

#1  Has an ALPHA and OMEGA logo with the model number 66644 beside it. The package is a Dual-Flat No-leads 8 (DFN8). Just from that I can search and find AONS66644 which is a 60V MOSFET.
#2 is a  SOD-123 diode marked SL.  1N5819 1.0A Schottky barrier rectifier
#3 SOT23  Marked A7   BAV99 High-speed switching diodes
#4 SOT-23-3L 3415    Huamei Semiconductor Linear voltage regulator IC LDO, 1.5V±1.5%, 500mA
#5 SOT-23-5 or SOT-25 This is where a circuit diagram comes in handy as it could be a Linear voltage regulator or Voltage detector
#6 SOT-23 2SC4410 NPN transistor

Now this does not guarantee perfect success, but having as much information as possible about the component helps.
« Last Edit: February 13, 2024, 07:06:06 pm by Jwillis »
 
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Online Gyro

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Re: Identifying components thread
« Reply #2 on: February 13, 2024, 07:08:17 pm »
Just for reference, there is a sticky 'mega thread' here...  https://www.eevblog.com/forum/chat/what_s-this-please-(component-advice)/
Best Regards, Chris
 
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