What "LE3CA" component is?
I'd wager a guess and say it's a TVS from Vishay (the logo at the bottom), probably a  SMBJ12A (unidirectional).



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.