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Kimber Kap 12uF 200V Capacitor
I give up.
This is a non-polarized capacitor. NP caps do not have "in" and "out" terminals. So why is one lead red and the other black?
One color represents the outer foil side, the other color represents the inner side.This type of capacitor is constructed using two sheets with an insulating paste between them. The sheets are then rolled together tightly, one side ends up on the outside, the other inside. As the outer shield is exposed to ambient RFI, it's placement in circuit can make a difference. As a general rule, when used as coupling caps between amplifier stages, I install these types of caps with the shield to the source side. When used as bypass caps, the shield side goes to ground to dissipate any picked up RFI. In theory, if the shield picks up RFI like an antenna, you want it to dissipate to ground rather than have it be amplified by the next stage. An oscilloscope is often used to identify the outer side, Kimber Kaps did the hard work by identifying the inner and outer terminals. According to the Kimber Kap Website regarding installation:"All values of Kimber Kap have a red lead at one end. The red lead should go towards the +DC voltage, or away from the –DC voltage. In coupling (DC Blocking) applications the red lead is the signal output end (it will be the same as the +side of an electrolytic capacitor in this position). In a loudspeaker crossover, the red lead should go towards the drive unit + terminal."Based on their description, I would say the black lead represents the outer foil side.Hope this helps.
Date published: 2013-06-26