seacorinc-dot-com: High Pulse Capacitors

["Paul Kidwell" <tmb-at-ieee-dot-org> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Everybody,

I saw a small ad in the EE Product News for the following caps. The IGBT
snubbers they show are designed to be screwed directly onto the IGBT's.
(They have tabs instead of leads) I thought that the tabs would have a
higher current carrying capacity than normal leads so I figured they
might make good MMC caps.

On inspecting the .pdf files, the dv/dt numbers didn't look so good. Am
I reading these wrong?

http://www.seacorinc-dot-com/Tables/high_pulse.htm

™
1 2 3 

High Pulse/High Current Capacitors 
Type 

Units KP21 KP25 MKP22 MKP27 IGBT Snubber
MKPI 337-339 IGBT Snubber
MKPI 347-349 
HTML Specs   KP21 KP25 MKP22 MKP27 MKPI 337-339 MKPI 347-349 
PDF Specs   KP21 KP25 MKP22 MKP27 MKPI 337-339 MKPI 347-349 
Application   

limiting di/dt or -dV/dt, reduce or eliminate or current spikes, reduce total
loss due to switching. Reduce EMI by damping voltage and current rising.
Damping, high pulse, high current operation, commutation Damping, very high
pulse, high current operation, commutation 
Dielectric   Polypropylene Polypropylene Polypropylene metallized
Polypropylene metallized Polypropylene metallized Polypropylene Film / Foil 
Capacity Range uF 0.00047 to 0.47 0.0001 to 0.33 0.001 to 2.2 0.00047 to
1.5 0.10 to 1.5 0.10 to 1 
Rated     DC
Voltage AC Vdc
Vac 250 to 2000
160 to 600 400 to 2000
220 to 600 250 to 2000
160 to 600 250 to 2000
160 to 600 1000 to 2000
475 to 630 1000 to 2000
475 to 630 
Temperature range deg C -55 to +100 -55 to +100 -55 to +100 -55 to +100 -40
to +85 -40 to +85 
Tolerance  ± % 5,10,20 5,10,20 5,10,20 5,10,20 10 10 
Pulse rise time max. V/µs 12000 12000 6400 6400 475 to 1000 600 to 1200 
Dissipation Factor Max. % 0.04 0.04 0.04 0.04 0.05 0.05 
Insulation 
Resistance min. MW 100000 100000 100000 100000 < 100 GW < 100 GW 
Construction (**)   Wrap & Fill (2) Rectangular Plastic Box (3) Wrap & Fill
(2) Rectangular Plastic Box (3) Plastic Box With Epoxy Filled (1) Plastic
Box With Epoxy Filled (1) 
Lead Spacing mm inch Axial 15 to 27.5
0.591 to 1.083 Axial 7.5 to 27.5
0.295 to 1.083 ----- ----- 

  Note (**) (1), (2), (3), (4) indicates appropriate photo 
*Other values are available. 

See Also:


Power Electronics Capacitors

  

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