Post by thread:[EE]: capacitor replacement on a monitor board

Hi Folks, decided to replace all the Electrolytics on a monitor board (Orion PWB-2022 like http://www.jomac.net.au/Orion%20PWB%202012-PWB2022.jpg) found in an old arcade machine because a 680uF 200WV (note WV not V) capacitor was bulging badly. The replacement I acquired (with some effort) has markings of 680uF 200V and is about 2/3 the physical size. Questions: 1. Is 200V = 200WV. Googling appears to indicate they are the same, that is [V]oltage = [W]orking [V]oltage but the physical size difference has me concerned. 2. I assume ceramics, greencaps and caps that look like a Polypropylene Film Capacitor eg www.1st-product.com/products/170/Polypropylene-Film-Capacitor-89663.html dont need to be replaced. They never seem to appear in any cap kit lists for these types of boards so figure it is just the electrolytics. Is this the general consensus. Justi

Em 12/3/2012 11:36, Justin Richards escreveu: {Quote hidden}> Hi Folks, > > decided to replace all the Electrolytics on a monitor board (Orion > PWB-2022 like http://www.jomac.net.au/Orion%20PWB%202012-PWB2022.jpg) > found in an old arcade machine because a 680uF 200WV (note WV not V) > capacitor was bulging badly. > > The replacement I acquired (with some effort) has markings of 680uF > 200V and is about 2/3 the physical size. > > Questions: > > 1. Is 200V = 200WV. Googling appears to indicate they are the same, > that is [V]oltage = [W]orking [V]oltage but the physical size > difference has me concerned. > > 2. I assume ceramics, greencaps and caps that look like a > Polypropylene Film Capacitor eg > www.1st-product.com/products/170/Polypropylene-Film-Capacitor-89663.html > dont need to be replaced. They never seem to appear in any cap kit > lists for these types of boards so figure it is just the > electrolytics. > > Is this the general consensus. > > Justin Manufacturers make electrolytics in more than one size for each capacitance and voltage. Smaller ones are usually more expensive and targeted to space constrained applications. Temperature range also affects the size. Another reason for the new ones being smaller may be that they use a newer technology, allowing the same capacitance in a smaller body. Isaac

On Mon, Mar 12, 2012 at 8:36 AM, Justin Richards <spam_OUTjustin.richardsTakeThisOuTgmail.com> wrote: > Hi Folks, > > decided to replace all the Electrolytics on a monitor board (Orion > PWB-2022 like http://www.jomac.net.au/Orion%20PWB%202012-PWB2022.jpg) > found in an old arcade machine because a 680uF 200WV (note WV not V) > capacitor was bulging badly. > > The replacement I acquired (with some effort) has markings of 680uF > 200V and is about 2/3 the physical size. > > Questions: > > 1. Is 200V = 200WV. Googling appears to indicate they are the same, > that is [V]oltage = [W]orking [V]oltage but the physical size > difference has me concerned. Are they the same temperature rating? 105C parts are often bigger than 85C parts of the same specs. (If you are bothering to replace caps, might as well use the better 105C rated part.) > > 2. I assume ceramics, greencaps and caps that look like a > Polypropylene Film Capacitor eg > www.1st-product.com/products/170/Polypropylene-Film-Capacitor-89663.html > dont need to be replaced. They never seem to appear in any cap kit > lists for these types of boards so figure it is just the > electrolytics. Right, ceramics and film caps do not dry out like electrolytics. -- Regards, Mark markrages@gmail

> > 1. Is 200V = 200WV. Googling appears to indicate they are the same, > > that is [V]oltage = [W]orking [V]oltage but the physical size > > difference has me concerned. > > Are they the same temperature rating? 105C parts are often bigger than 85C parts of > the same specs. (If you are bothering to replace caps, might as well use the better > 105C rated part.) That is one factor, but if marked as 200VW, then I think I would want a 350V part in there if you cannot get one marked 200VW. -- Scanned by iCritical.