First hard drive recovery

[amigor]

Hi, guys.
Could you help me to find the characteristics of D4 element on this controller?
As it was said, it's a 5V TVS diode.

Is it unidirectional or bidirectional? What are the other characteristics? (400W ?)

Thanks a lot!

[Dmitry Postrigan]

It is a uni-directional TVS, most likely this one:
http://www.digikey.com/product-detail/e ... -ND/285951

(or very similar)