BLM31KN801SH1L Filters

Series:	BLM
Packaging:	Tape & Reel (TR)
Part Status:	Active
Filter Type:	Power Line
Number of Lines:	1
Impedance @ Frequency:	800 Ohms @ 100MHz
Current Rating (Max):	2.5A
DC Resistance (DCR) (Max):	50 mOhm
Ratings:	AEC-Q200
Operating Temperature:	-55°C ~ 125°C
Package / Case:	1206 (3216 Metric)
Mounting Type:	Surface Mount
Height (Max):	0.071" (1.80mm)
Size / Dimension:	0.126" L x 0.063" W (3.20mm x 1.60mm)
Features:	--

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<h1>Ferrite Beads and Chips</h1>Ferrite beads and chips are electrical components used for the purpose of counteracting EMI (electromagnetic interference) in electronic circuits. The BLM31KN801SH1L is a ferrite chip manufactured by TDK Corporation that is specifically designed to effectively suppress EMI generated by signal transmission lines.<h2>Application Field</h2>The BLM31KN801SH1L is ideal for use in automotive applications including CAN, FlexRay, and LIN bus systems. In addition, it is suitable for telecommunications applications such as GPS, WLAN, and RFID systems that require a low EMI signature.<h2>Working Principle</h2>The BLM31KN801SH1L utilizes the principle of impedance bridging to reduce EMI. This is accomplished by connecting the ferrite chip between the ground and signal lines in order to form an inductive voltage divider. This creates a high impedance path for the EMI signals which reduces the amount of EMI transmitted into the circuit.The ferrite chip consists of two layers. The first layer is a soft ferrite material surrounded by an insulating material such as epoxy resin or polyurethane. This layer provides a low inductance value which enables the chip to block noise propagation along the signal line. The second layer is a harder anisotropic ferrite material, which has a higher inductance value for improved EMI suppression. The chip also uses the gap between the two layers to further reduce EMI. As the signal passes through the gap, the electric field lines are disrupted. This creates a barrier which further reduces the amount of EMI transmitted into the circuit.The BLM31KN801SH1L is an effective and reliable method for reducing EMI in automotive and telecommunications applications. The chip has a low profile and is available in a variety of sizes and shapes to suit various applications.

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