Crown amp recap

Hi, in new on the forum. I have a crown ma12000i from 2010 that needs recapping.
It has 20 teapo 220v 1200uf lh 85°c that i couldnt find anywhere, can someone help me?

Hello @piva.ludovico,

Welcome to the DigiKey forum!

That is an impressive amplifier.

Before joining the DigiKey team I constructed this video that may help answer your question:

Chances are high that DigiKey has the capacitors you are looking for. Here are several options.

Be sure to verify the mechanical size of the capacitor leads as described in the video. Also, capacitors tend to get better (smaller with longer life) over time, You may be able to use improved 105°C devices.

Best wishes,

APDahlen

Hello piva.ludovico,

Welcome to the DigiKey TechForum,
Click here for the closest matches, that we have for a 220V, 1200uf cap.
These are General Purpose Capacitors, and not a specific audio grade, and can also handle up to 105C temperatures.
The closest match for an Audio grade, is 493-16519-ND, but is only rated for 200V.
Please check the datasheets to help verify compatibility to your application.

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Hi, thanks for the answers, i forgot to mention the dimensions of the capacitors, they are approximatly d25*h50mm. I didnt find anything aviable within this sizes.

@APDahlen and yes this amp Is a Beast ahahaha, shakes the roof with 4*18 drivers

Hello @piva.ludovico,

Understood. However, we need to be sure of total number of leads (2 vs 3), style, and the spacing for the capacitors as they contact the PCB.

Also, as I understand the limitation, the capacitors are closely packed into the amplifier. Consequently, the diameter of the replacement is important. Likewise, you may not have any wiggle room in height as the 2U (1.75 x 2) chassis height is a limitation.

Please let us know what you find.

Sincerely,

Aaron

Yes, i’ve taken a couple of photos of the capacitor and distance of the leads with a caliber measurement, don’t know of they are custom ones.



Hello @piva.ludovico,

Now I can see your frustration.

This Chemi-Con ESMM221VSN122MQ50U part appears to be a substitution. Unfortunately, it is a special-order components. Follow the “Available To Order” section on the component’s page.

The challenge is locating a replacement rated at 220 VDC. There are several components with 200 VDC. Unfortunately, I’m hesitant to call these a solution as there may be corner cases when they break down in your amplifier.

Sincerely,

Aaron

P.S. As always, double check my work to make sure I have not misread or misinterpreted your measurements.

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We have in stock a few 250V rated capacitors that will fit in that spot. For example:

Nichicon LGX2E122MELB50

My mistake, I misread the diameter of your cap, that would work if a 30mm capacitor would fit in that spot.

@APDahlen yeah, the output voltage of the amp at clip Is 200v peak so i assume the 200v rated capacitor in the Rail can’t keep up with that. Shame that the equivalent isn’t aviable on a normal order.

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