BLM31PG121SZ1L Filters

Series:	EMIFIL®, BLM31
Packaging:	Tape & Reel (TR)
Part Status:	Active
Filter Type:	Power Line
Number of Lines:	1
Impedance @ Frequency:	120 Ohms @ 100MHz
Current Rating (Max):	3.5A
DC Resistance (DCR) (Max):	20 mOhm
Ratings:	AEC-Q200
Operating Temperature:	-55°C ~ 125°C
Package / Case:	1206 (3216 Metric)
Mounting Type:	Surface Mount
Height (Max):	0.051" (1.30mm)
Size / Dimension:	0.126" L x 0.063" W (3.20mm x 1.60mm)

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Ferrite beads and chips are devices and components used in electronic circuits, primarily for damping or filtering high frequency electrical signals. One of the most common ferrite beads and chips is the BLM31PG121SZ1L. This bead can be used in many different applications, ranging from noise suppression and Clamping in consumer products to EMI and EMC shielding in high performance equipment. This article will discuss the application field and working principle of the BLM31PG121SZ1L.The BLM31PG121SZ1L is an inductor made of a ferromagnetic core with two or more inductive windings. The core can be made of either ferrite material or iron powder, while the windings are usually copper wire. The BLM31PG121SZ1L is a very versatile component and can be used in a variety of applications.In consumer products, the BLM31PG121SZ1L can be used for noise suppression and clamping. The two windings create a voltage drop which helps reduce noise in the circuit by dampening high frequency signals. The BLM31PG121SZ1L is also used to help protect sensitive components from voltage spikes and other EMI generated by high power equipment.In audio equipment, the BLM31PG121SZ1L is used to filter out high frequency spurious signals, such as radio station signals and other background noise. In EMI/EMC equipment, the ferrite bead is used to reduce crosstalk and RF interference. The device can be used to both suppress and reject EMI signals, depending on the circuit design and the application.The BLM31PG121SZ1L also features good impedance properties and high temperature stability, making it suitable for use in more demanding applications. The ferrite bead is also available with different winding numbers and impedance ratings, making it suitable for a wide range of applications.The working principle of the BLM31PG121SZ1L is based on the principle of inductance. When a current passes through the windings, a magnetic field is created around the core. This magnetic field induces an opposing voltage in the windings which creates a voltage drop. This voltage drop helps reduce high frequency signals and is the primary function of the BLM31PG121SZ1L.In addition to its primary function, the BLM31PG121SZ1L also serves as an impedance matching device. The windings and core of the device create a specific impedance level which can be matched to the impedance of a specific circuit. This helps reduce or eliminate oscillations and reflections which occur when the impedance of the circuit is mismatched to the device.All in all, the BLM31PG121SZ1L is a versatile component with a wide range of applications. It can be used for noise suppression, clamping, EMI/EMC shielding, and impedance matching. The device\'s working principle is based on the principle of inductance and it features good impedance properties and high temperature stability.

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