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Re: [TCML] Pulse Capacitors



Hi Tim,

Most of Maxwell's 31xxx series caps are only rated for 1 Pulse Per Second (PPS). A few exceptions models 31393, 31662, 31677, 31687, 31892, and 31981(all 100 PPS) and 31583(400 PPS). Maxwell's specs for the Model 31190 0.08 uF 100 kV cap (currently listed on eBay) show that the cap is indeed only rated for 1 PPS.

Although not explicitly stated, the polymer film dielectric used in this cap may be Mylar (PET) and not (the more desirable) Polypropylene. A call to General Atomics Energy Products (the current owner of the old Maxwell line of products) would be strongly advised before buying this capacitor. If the cap uses Mylar, it may work for short run times in TC use, but you'll need to be very careful not to overheat (and destroy) it. There may be better choices, such as an MMC.

Best wishes,

Bert
--
Bert Hickman
Stoneridge Engineering, LLC
http://www.capturedlightning.com
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Tim Flood wrote:
I need a .08uF, 60kV cap for a new PT powered TC. There is a pulse cap on
Ebay, but rated at 100kV. Does anyone see any problems with the higher than
needed voltage rating?

Thank you,

Tim Flood
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