BK20104L121-T Filters

Series:	BK
Packaging:	Tape & Reel (TR)
Part Status:	Active
Filter Type:	--
Number of Lines:	4
Impedance @ Frequency:	120 Ohms @ 100MHz
Current Rating (Max):	100mA
DC Resistance (DCR) (Max):	700 mOhm
Ratings:	--
Operating Temperature:	-55°C ~ 125°C
Package / Case:	0804 (2010 Metric), Array, 8 PC Pad
Mounting Type:	Surface Mount
Height (Max):	0.020" (0.50mm)
Size / Dimension:	0.079" L x 0.039" W (2.00mm x 1.00mm)

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Ferrite Beads and Chips are widely used in electronics to reduce electrical noise. BK20104L121-T, a ferrite bead manufactured by BEL Fuse Inc., is no exception. This device provides exceptional noise attenuation, shielding, and high repeatability. In this document, we will discuss its application fields and explain the working principle of this component.BK20104L121-T is a 27 MHz high-Q multilayer common mode line filter. It is designed to reduce EMI and RFI emissions from power and signal lines in a wide variety of electronics designs. It’s used in many applications, including computers, telecommunications, industrial controllers, medical equipment, and domestic appliances.The component has a variety of features that make it suitable for a wide range of applications. Firstly, it offers superior EMI/RFI protection in a compact size. Secondly, it has a high attenuation frequency and a low profile, and can be easily soldered in place with minimal effort. Thirdly, it can operate up to 105℃ and is RoHS compliant.The working principle of BK20104L121-T is based on magnetic technology. The EMI and RFI generated by electrical circuits and equipment can be reduced by passing them through a ferrite bead. This type of bead provides high impedance and low magnetic leakage of the signal. It works by inductively coupling two lines of alternative current to form an alternating magnetic field which then suppresses any generated interference.In essence, ferrite beads act as a low-pass filter to reduce the high-frequency noise coming from the equipment or circuit. The design of the BK20104L121-T is optimized to provide the best attenuation possible for a wide range of frequencies between 27MHz and 200MHz. In addition, the device also provides excellent thermal stability and offers high current handling capacity.Overall, the BK20104L121-T is a widely used noise filtering device that provides exceptional EMI/RFI protection in a compact size. Its versatile design and features allow it to be used for many different applications. Its working principle of inductively coupling two lines of alternative current to suppress any generated noise is simple yet effective. The device can handle high temperatures and high currents, making it an ideal choice for many electronics designs.

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