BLM18EG121SN1D

Ferrite Beads and Chips

Ferrite beads and chips are general-purpose pieces used to cure radio frequency interference (RFI) and electromagnetic interference (EMI). These components, form-fitted for both high-speed digital and analog signals, absorb and filter out the interference from external sources, help protect sensitive circuits, and maintain the integrity of the signal.

BLM18EG121SN1D is a typical ferrite bead chip, which is known for its low DC resistance, quick thermal reaction, and high temperature stability. It has wide application fields and versatile usage.

Application Fields

BLM18EG121SN1D is a very popular ferrite bead chip used in industries such as consumer electronics, communications, automotive, and medical. It is also widely used in digital and video applications, such as flat panel displays, DVD players, and digital TVs.

The chip is capable of operating up to 10GHz, making it a great choice in applications such as cellular phones, WAN cards, GPS, and satellite receivers. Its small physical size and low profile are ideal for robustness in space-constrained application designs.

Working Principle

Like other ferrite beads, BLM18EG121SN1D works on the principle of converting high-frequency interference or noise into heat. The interference is converted to heat due to the resistive properties of ferrite, which is dependent on the frequency of the interference. The higher the frequency, the more energy is dissipated.

The chip works by providing a path for high-frequency noise to flow, which is then converted into heat. The chip acts as a "barrier" that works to block interference while allowing signals in and out to pass through without being filtered or attenuated.

BLM18EG121SN1D is designed with an inductance value of 0.9nho. This chip exhibits excellent attenuation through the wide frequency range of 100MHz~10GHz, and can handle high, intermittent RF EMI power spikes up to 40dB. It also features a very good thermal response time, allowing it to dissipate up to 40 Watts of power, depending on frequency.

Conclusion

BLM18EG121SN1D is a ferrite bead chip that is used to reduce or eliminate radio frequency interference (RFI) and electromagnetic interference (EMI) in industries such as consumer electronics, communications, automotive, and medical. It is capable of operating up to 10GHz and has wide application fields. It works on the principle of converting high-frequency interference or noise into heat, and features an inductance value of 0.9noh and an excellent attenuation through the wide frequency range of 100MHz~10GHz.