KNH21221-3AA

Current:	1A
Height:	0.037" (0.95mm)
Size / Dimension:	0.079" L x 0.049" W (2.00mm x 1.25mm)
Package / Case:	0805 (2012 Metric)
Mounting Type:	Surface Mount
Voltage - Rated:	50V
Applications:	General Purpose
Operating Temperature:	-25°C ~ 85°C
ESD Protection:	No
Values:	C = 220pF
Series:	KNH, Kyocera
Resistance - Channel (Ohms):	0.08
Attenuation Value:	--
Center / Cutoff Frequency:	--
Technology:	LC
Filter Order:	--
Type:	Low Pass
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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EMI/RFI Filters (LC, RC Networks)Electromagnetic interference (EMI) and radio-frequency interference (RFI) have been a growing concern for many industries, especially in the electronic and audiovisual fields. These forms of interference can cause problems in communication, and even affect system operation, performance, and user experience. As such, it is important to find ways to reduce or eliminate these forms of interference. One of the more common solutions to this issue is EMI/RFI filters (LC, RC networks).KNH21221-3AA is one form of EMI/RFI filters. It is a general-use filter that can either control the flow of current between power and ground terminals, or filter controlled output from an alternating current source. The filter is designed for applications of power line filtering, such as filtering of motor, amplifier, and switching power supplies. It is also suitable for differential current control to reduce AC line noise and improve system operation.The KNH21221-3AA filter consists of an inductor, a capacitor, and a resistor. All of these components work together to reduce the intensity of high frequency electromagnetic radiation emitted from the device using the filter. The inductor creates a low-pass filter, which reduces high frequency signals, while the capacitor creates a high-pass filter, which reduces lower frequency signals. The resistor acts to limit the voltage and current, thus reducing the amount of interference emitted by the device.To work properly, the filter must be correctly mounted and wired up. The voltage rating must be equal to or greater than the voltage being used. The inductor must be placed near the device output, and the capacitor should be placed near the power source. The resistor should be placed between the output and ground terminals. The resistor should also be chosen so that it can handle the current being drawn by the device.Knox 21221-3AA filter is an ideal solution for many types of application. Due to its low cost and efficient performance, it can be used in a variety of applications, such as filtering of motors, amplifiers, and switching power supplies. By using this filter, it will help ensure that electronic devices are protected from undesirable interference while ensuring optimal performance.

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