27. Diode Selection and Application

Question.2

A hardware designer wants to protect a 5V rail using BZX85C12 Zener diode.
Open the DigiKey product page / datasheet for this part:

Is this Zener diode appropriate for clamping a 5V rail?

Note- Refer the BZX85C12 DigiKey product page / datasheet.

1N4007G-Diode-Images

Need Help? Refer to the Quick Guide below

Select Answer

Yes- because any Zener diode can clamp a 5V rail
Yes- because its 1W power rating is enough
No- its nominal Zener voltage is 12V, so it is too high for 5V clamping
No- 1W Power rating is too low.