# is that any formula to calculate the speed of blowing capacitor when it is blown up?

#### Wik

when 5v capacitor being feed with 50 volt and another 5v being feed with 500 volt could be the result will be different speed?
if different, how to calculate the speed?

#### rayma

Capacitor stored energy = 0.5 x C x V^2

If C1 and C2 have the same uF values, then the energy stored in the 500V cap is 100 times that of the 50V cap,

since 500^2 / 50^2 = 100

We will assume that the stored energy (of charge in capacitor) = kinetic energy of part (when it explodes).

The kinetic energy of the part = 0.5 x m x v^2 where v = velocity of part, and m = mass of part.
and the m is the same for both capacitors.

Then the velocity of the 500V capacitor is ten times that of the 50V capacitor,

since v(of 500 V cap)^2 /v(of 50V cap)^2 = 100, and then v(of 500V cap) = 10 x v(of 50V cap)

So look out.

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#### tommus

just a visual to go along with the theory:

3 users

#### Galu

Holy smoke!

Paid Member
when 5v capacitor being feed with 50 volt and another 5v being feed with 500 volt could be the result will be different speed?
if different, how to calculate the speed?
You can not calculate anything without a lot of input data.

1 user

#### TonyTecson

even volts lower than the label are able to blow up capacitors, how much more over voltage...
i do not see how a speed calculator can help but you can try to experiment using time lapse photography and reverse engineer..

1 user

#### NareshBrd

Why do you want to blow up capacitors?
You can always use other types of explosive devices for whatever you want to do.
Even reversed capacitors can blow up, though they are slower in that.

#### Galu

Perhaps Wik is intent on having a blast from pyromania!

#### Ultima Thule

Hopefully the last one...

#### mickeymoose

This won't answer the question, but answers the question: What the.....?: Some people have just to much time! E

#### tonyEE

Paid Member
when 5v capacitor being feed with 50 volt and another 5v being feed with 500 volt could be the result will be different speed?
if different, how to calculate the speed?

How fast? In my professional experience... it was \$250,000 bucks back in '85.

The capacitors, and diodes, were faster than my ability to lunge 14 feet to the big Red Button that shut down the test station... The power supplies were at 69VDC.

I ought to note that caps are sort of boring, they just blow up.... Diodes... ahh... put them volts backwards and watch them immolate themselves like a pico-X-ray-Death-star with a pulse of white hot plasma.

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#### tonyEE

Paid Member
Why do you want to blow up capacitors?
You can always use other types of explosive devices for whatever you want to do.
Even reversed capacitors can blow up, though they are slower in that.

Back when I was taking the entry "analog electronics" course, we'd waste our time by blowing up transistors.

Three leads... three holes in the AC outlet.

Or my first ever hacked power supply. I didn't need no stinking ON/OFF switch. Hmmm.... lots of clean up after the big caps blew up. I mean, I was at the He-Man-Can-Do-No-Wrong stage of my life... who could have expected that I'd wire them backwards, huh?

The caps were FASTER than I could reach down under the desk and yank the power cord..... big buggers were fast, I tell ya...

#### NareshBrd

Perhaps the OP can read through the posts of 'tubelab', our esteemed member, who used to blow things up, for some pointers?

#### Wik

How fast? In my professional experience... it was \$250,000 bucks back in '85.

The capacitors, and diodes, were faster than my ability to lunge 14 feet to the big Red Button that shut down the test station... The power supplies were at 69VDC.

I ought to note that caps are sort of boring, they just blow up.... Diodes... ahh... put them volts backwards and watch them immolate themselves like a pico-X-ray-Death-star with a pulse of white hot plasma.
what????????\$2500000 ???? what capacitor so expensive???????

#### rayma

I think that is called a cascading failure.

#### Wik

@NareshBrd tube can exploded?????????i thought only wire in the tube will crack

Large capacitors look ferocious when they blow. even for some of the little guys. I heard/ seen aftermath of a 12 volt inline auto cap blow. The kid was installing one as new and starting the charging process he didn't get to finish. He was fine from working and duct under his hood when it went off.

John Candy was an explosive comedian

#### tonyEE

Paid Member
what????????\$2500000 ???? what capacitor so expensive???????

Every capacitor, IC and diode on a Not For Flight Conformal Coated Eval board.

1 users

#### lcsaszar

The ugliest creatures are those drop form tantalum capacitors. They don't blow up, but invisibly go in short circuit. Sometimes even at normal operating conditions.

1 users

#### Ultima Thule

what????????\$2500000 ???? what capacitor so expensive???????