Contents
What is a suppression capacitor used for?
EMI suppression capacitors are used to suppress any noise from an electronic device by reducing the input impedance of the device.
What is interference suppression capacitor?
EMI/ RFI Interference suppression capacitors are used to filter out any noise or high voltage spikes that can cause damage to a circuit device. There are two classes of interference suppression capacitors, Class X and Y. Like X capacitors the different classes have different peak voltage ratings.
How does a noise suppression capacitor work?
Capacitors interrupt direct current and let alternating current pass. For electronic devices that run on DC voltage, elements of an alternating-current become noise that makes operation unstable. As a countermeasure, capacitors are connected so as to allow the AC elements to pass through to the ground.
What is an interference suppressor?
An interference suppression filter reliably suppresses high-frequency interference by using special coils, capacitors and resistors and thus filters or prevents picture and sound interference.
What are the types of interference suppression capacitors?
There are two major types of interference-suppression / AC line filter safety capacitors; namely, type X and type Y. The purpose of these capacitors is to reduce radio frequency interference and to ensure safety from shock and fire.
Where can I get a suppression capacitor?
You get these kinds of things via mail order from electronics distributors like Mouser, Digikey, Newark/Farnell, and many others. They are suppression caps, not decoupling caps as they are used to provide protection from transients on the H-bridge drivers.
What are the different types of Safety capacitors?
These safety capacitors are also known by other names, including EMI/RFI suppression capacitors and AC line filter safety capacitors. (EMI stands for electromagnetic interference and RFI stands for radio-frequency interference; RFI is simply higher-frequency EMI.)
What kind of capacitors are used in line filter circuit?
Below is a schematic of a modern day “line filter circuit” which shows the safety capacitor (s) C1 and C2. Capacitor C1 would be a type X “across the line” capacitor and the two C2s would be type Y “line to ground” safety capacitors.