What “LE3CA” component is

componentsdiodeszener

After plugging the device to the wrong power supply, it doesn't work anymore. When I plug the good power supply, the alimentation voltage drop to 0V and the component LE3CA is really hot (shortcut maybe?).

Because this component is close to the power supply, I'd like to replace it, just in case it repairs my device. My problem is I didn't find the reference of the component (maybe a zener diode) and the product company doesn't want to tell me 🙁

You can see the component in the middle of the picture.

board

Best Answer

I'd wager a guess and say it's a TVS from Vishay (the logo at the bottom), probably a SMBJ12A (unidirectional).

datasheet excerpt

The 3CA is the date code. Which tells us: manufactured December 2013 in factory A (I don't know where A is). (based on this document)

To make it more clear how I came to that conclusion:

  • cathode band -> unidirectional device (also in the second document)
  • LE marking -> type code
  • 3CA marking -> date code

A search with Vishay LE marking turned up the mentioned TVS. Looking at Zener diodes from Vishay in the SMA/SMB case turned up quite different type codes (Wx - Zx) so it's unlikely to be a Zener diode.