Reversed biased diode for beeper...

[alank2]

I'm using a PZT2222 to drive a "5V active beeper" that I bought off eBay.  I recall using these in the past and didn't notice much of a kick back when turning one off, but I just took a look at it with my scope and it shows a 200ns pulse of 63V.  The PZT2222 data sheet says the CE voltage max is 40V.  Does this mean I need to use a reversed biased diode?  Is 200ns short enough that it isn't necessary?

[rs20]

I haven't heard the concept of a pulse being too short to be damaging... it might slow down the damage perhaps, but I'd be putting the diode there if I were you. Maybe I'm overly conservative though.