Ken,
Rule of thumb which hopefully is accurate:
MOV's have a discrete lifetime (like 10 cycles at full rating) before
they're gone.
In order of joules absorbed versus package size:
Glass tubes, MOV's, silicon (from huskiest to weakest)
For turn on time:
silicon, MOV's, glass tubes (from fastest to slowest)
The glass tubes absolutely take a discrete amount of time before they're
"on"
The voltage across the MOV's can really go very high as they're coming on -
like 3 times they're rating voltage. The overshoot depends upon the rise
time of the incoming.
Performance in the system depends a great deal upon the lead length, layout
etc for real effectiveness.
- Robert -
-----Original Message-----
From: Ken Javor <[email protected]>
To: [email protected] <[email protected]>
List-Post: [email protected]
Date: Tuesday, January 11, 2000 3:32 PM
Subject: transient suppression
>
>When choosing transient suppression for power line input to equipment, what
>are the choices (MOVs, silicon TVS, glass discharge tubes, others) and what
>are the trade-offs? Thank you.
>
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