PMC0402-102

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Ferrite beads and chips offer a range of solutions for noise suppression. The PMC0402-102 is an example of a ferrite bead that is both small and provides a high level of signal protection. This article looks at the application field and working principle of the PMC0402-102.

The PMC0402-102 is a small Type II ferrite bead measuring just 2.0 x 0.5mm.It is designed for low-current signal and data lines including high-speed DDR memory applications, and is compliant with the +/-5V, 3.3V, and 1.8V power supply voltages that are standard for DDR memory. It can be used in signal lines up to 20MHz, and in power lines up to 1MHz.

The PMC0402-102 is ideal for noise suppression on small and sensitive signal lines such as high-speed DDR memory applications, cable lines for consumer electronics, and signal lines on high-speed PCBs. It is also suitable for low-current applications such as MOSFET gate drive lines and audio signal lines.

The PMC0402-102 has a low insertion loss of 11dB at 10MHz and a high common mode attenuation of 40dB at 100MHz. This high level of signal protection is achieved by the combination of a high-performance core and a nickel-zinc plated shield. The core is composed of a NiZn ferrite, which has a high permeability and low resistance across a wide frequency range, making it ideally suited to signal line noise suppression.

The PMC0402-102 also has a relatively high impedance, measured in Ohms, and high current tolerances. This enables it to maintain its signal protection capabilities even when subjected to high electrical currents. This is crucial in applications where high-frequency signals are present and transient currents may be present.

The working principle of a ferrite bead is relatively straightforward. The bead acts as a low-pass filter for short-duration, low-frequency electrical signals. When a low-frequency signal passes through the bead, the bead will absorb the signal and convert it into heat. This prevents the signal from reaching its destination and reduces noise on the signal line. This type of noise suppression is often used in high-frequency applications, as it is effective even when high-frequency signals are present.

The PMC0402-102 is also relatively easy to install and use. It can be assembled onto the PCB by soldering or by using a suitable plated-through-hole mount. It is also compatible with most modern soldering technologies, including reflow and wave soldering. It is also RoHS compliant, making it ideal for use in newly designed products.

In conclusion, the PMC0402-102 is a small, reliable ferrite bead that is ideal for low-current signal and data lines including high-speed DDR memory applications. It provides a high level of signal protection and excellent common-mode attenuation, making it perfect for noise suppression on small and sensitive signal lines as well as low-current applications such as MOSFET gate drive lines and audio signal lines. It also has a relatively high impedance and current tolerance, making it a great choice for applications subject to high-frequency signals and transient currents. Finally, it is easy to install and is RoHS compliant, making it suitable for new products and designs.

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