Reduce noise and overheating with a high voltage coupling capacitor.
Reduces DC Noise in Amplifiers
High voltage coupling capacitors, placed at the input of an amplifier stage, blocks DC current from entering that stage. This prevents the DC current from one stage, from being amplified in the next stage, reducing DC noise.
Reduces Failures in Amplifiers and Power Supplies
Excessive DC currents and high voltage can overheat and destroy a capacitor in a matter of seconds. If this current gets past the input capacitor, it will destroy the next stage of an amplifier or power supply. By using very high voltage coupling capacitors, it's possible to reduce and minimize the affects of these types of failures. Lightning strikes on a power grid during an electrical storm is one situation where a high voltage DC current is introduced into system.
Reduces the Start up Effects of Large Inductive Loads
Large inductive loads such as electric motors draw heavy currents during their initial start up. The inductance of the motor tries to resist the new current flow being established by the new voltage. This heavy current draw period can have negative affects on other machines connected to the same power system. By adding a high voltage coupling capacitor across the load, we can reduce the loading effects caused during start up. During start up, the coupling capacitor will discharge providing the additional power needed to start the load and reducing the affects on the system.
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