4420P-601-470/201L

Resistance - Channel (Ohms):	47
Height:	0.114" (2.90mm)
Size / Dimension:	0.510" L x 0.295" W (12.95mm x 7.50mm)
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Voltage - Rated:	25V
Applications:	General Purpose
Operating Temperature:	10°C ~ 85°C
ESD Protection:	No
Values:	R = 47 Ohms, C = 200pF
Series:	601
Attenuation Value:	--
Center / Cutoff Frequency:	--
Number of Channels:	8
Technology:	RC (T-Type)
Filter Order:	1st
Type:	Low Pass
Part Status:	Active
Packaging:	Tape & Reel (TR)

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EMI/RFI Filters (LC, RC Networks)

Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI) are forms of unwanted signals that can negatively affect the circuit operation and performance of electrical or electronic devices. EMI/RFI filters act as a barrier between the interfering signal and the sensitive electronic devices, thereby preventing those signals from entering the device and causing interference. The 4420P-601-470/201L EMI/RFI filter is a two-pole high pass filter, designed to reduce electromagnetic interference (EMI) and radio frequency interference (RFI) in power distribution systems.

Applications

The 4420P-601-470/201L filter can be used to attenuate EMI and RFI in applications such as switch-mode power supplies, power over Ethernet, and other high-power items. The filter can be used with high-frequency switching circuits that require electrical noise suppression. It can also be used in automotive applications such as lights and engine control systems.

Design & Construction

The 4420P-601-470/201L filter is a two-pole high pass filter, consisting of two inductors (L1 and L2) and two capacitors (C1 and C2). The inductors are wound with high-quality copper wire in order to reduce noise and ensure high performance. The capacitors used are designed for high ripple current and are made with low-loss polymer-based metallized film, providing high-frequency performance. The filter is enclosed in a metal can to provide additional EMI/RFI shielding.

Working Principle

The 4420P-601-470/201L filter is designed to reduce interference from high-frequency electromagnetic fields by using an LC network. The two inductors (L1 and L2) are connected in series to form a low-pass filter, while the two capacitors (C1 and C2) form a high-pass filter. The series LC network blocks certain frequencies of EMI and RFI while allowing others to pass through. This reduces the level of unwanted signals entering the device, preventing interference and improving the signal-to-noise ratio. The metal enclosure further reduces interference levels by providing additional shielding.

Conclusion

The 4420P-601-470/201L EMI/RFI filter is a two-pole high pass filter, designed to reduce electromagnetic interference and radio frequency interference in a variety of applications. It utilizes two inductors and two capacitors to create an LC network that blocks unwanted frequencies while allowing others to pass through. The filter is also enclosed in a metal can to provide additional EMI/RFI shielding. This makes the 4420P-601-470/201L an effective means of protecting sensitive equipment from EMI and RFI interference.

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