SMD component identification - I have a SOT-23 with a marking 20A can anyone help me identify?

Thanks,

Kevin

 

Here is a good general resource page; lots of links:
http://www.educypedia.be/electronics/datacomponent.htm

However, I looked around and couldn't find a match for 20A.

 

It could be a double diode, cannot find it either. Check it with a meter.

Fellows; take note, this is valuable and contribute to it as you can :

http://www.marsport.org.uk/smd/mainframe.htm

Miguel

 

One of the best ways of narrowing down SMT parts is to determine the manufacturer from the logo, which even in SMT parts is almost always stamped or etched into the top of the plastic part. Then, its easy to find sites that show the logos of all semiconductor and electronic part manufacturers. Once you've determined the mfg, and you have the marking, you're 90% there and if all else fails, call the manufacturer and ask the customer service people or the applicfation engineers.

Regards,
Kamran Kazem
kkazem

 

Thanks for all your replies -

I couldn't find the manufacturing logo anywhere; it looks like a flipped-up Lexus logo without the circle around it. The properties of the three terminals are - two have 230ohm both direction and no reading on the third. Checking a good device with a Huntron I only see the 230ohm and no junctions on any of the terminals. In the circuit the two terminals next to each other are connected together, the device sits parallel in the base emitter junction of an IGBT.

20A

 

Might be a Littelfuse logo?
Website: http://www.littelfuse.com/

Some company logos here:
http://www.alldatasheet.com/manufacturer/lm.jsp

You might try here:
http://www.icmaster.com/search/HomePageAction.ad
ICmaster requires registration. Don't know if there's a cost to do searches etc.

 

Thank you for these sites, all good links however for the life of me I still can’t identify the SMT markings, nor can I figure out what type of component it is.

Kevin

SMT23 markings - 20A /

 

Here is a good general resource page; lots of links:
http://www.educypedia.be/electronics/datacomponent.htm

However, I looked around and couldn't find a match for 20A.

Thanks. THis link is very useful.

 

It's almost certainly a MOSFET rated for 20 Amps

To find out if its PNP or NPN and the necessary upper voltage tolerance you'll have to look closer at the circuit layout.

This based on the knowledge that the gate of a MOSFET is electrically isolated from the source and drain. So it makes sense that there's no reading on the third pin.

Greetings
Rand0man

 

Mosfets are neither NPN nor PNP, mosfets are N or P. And you seriously think that if it really were a mosfet, that it would have the current rating marked on it? And why not voltage rating?

 

Hello,

I have a problem with identifying a component. Can you give me a hand?

It's a SMD, first line : AḄ

second: murata logo followed by a 4. Thank you!