BLM18BD121SN1D

Ferrite beads and chips is a type of magneto-resistive composite material, typically made of ferrite. The most abundant and commonly used material of ferrite beads is iron oxide mixed with barium, strontium, or combination of the two. Ferrite beads and chips have numerous applications in electronics due to their high magnetic permeability and resistance to temperature and corrosion. And one of the most widely used products in the ferrite beads and chips products family is BLM18BD121SN1D, which is a medium power wideband common-mode ferrite shielded bead inductor.

Application field

BLM18BD121SN1D is a kind of ferrite inductor with multiple pins. It has two mounting pins for connection, and a shielded design for increased performance. With the two pins, BLM18BD121SN1D can be applied in various electronic components and systems, such as power inductors, data cables, common-mode suppression coils, EMI suppression filter components, industrial electronic circuits, and many more. Compared with conventional ferrite beads, it has higher frequency range and higher impedance due to its unique design. As a result, it provides better protection against electromagnetic interference (EMI).

Working principle

BLM18BD121SN1D works on the principle of using the inductance of the two pin winding structure to form a low resistance short of the common-mode noise or signal interference. The design of BLM18BD121SN1D utilizes two different types of magnetic materials in the winding structure, with one male and one female ferrite clamping the two pins together for maximum signal filtering effect. The ferrite clamp structure also creates a magnetic shielding effect which further reduces the EMI generated from various electronic components or systems. Because of the magnetic effect, BLM18BD121SN1D is able to sense antenna signals at a much longer distance from the source of interference. This dynamic magnetic response feature makes it ideal for applications that have a greater distance away from the source of interference, or require more reliable EMI filtering performance.

The performance of BLM18BD121SN1D depends on the quantity of magnetic material used and the winding geometry. The material used determines the maximum induction of the signal path and the winding geometry determines the tolerance to temperature fluctuations. The ferrite winding structure of BLM18BD121SN1D has been optimized to achieve maximum performance while still maintaining a low profile. The optimized winding structure also improves the signal filtering performance by offering higher impedance and lower losses.

In conclusion, the BLM18BD121SN1D ferrite inductor has a wide range of applications in a variety of electronic components and systems. The dynamic magnetic response feature of BLM18BD121SN1D provides an excellent level of signal filtering performance and the low profile design ensures ease of integration. With its high frequency range and temperature resistance, the BLM18BD121SN1D is the perfect choice for applications that require reliable EMI filtering performance over a longer distance away from the source of interference.