NFZ18SM251SN10D

Overview

The NFZ18SM251SN10D is a single-line ferrite bead from Murata Electronics, designed for noise suppression in digital audio applications. It features a 0603 (1608 Metric) surface-mount package with dimensions of 1.6 mm length, 0.8 mm width, and 0.8 mm height. The component provides an impedance of 250 Ohms at 100 MHz with a tolerance of ±25%. It supports a maximum DC current of 1.1 A and has a maximum DC resistance of 190 mOhms. The operating temperature range spans from -55°C to +125°C.

Feature Summary

• Designed specifically for radiation noise suppression in digital audio circuits
• Single-line configuration suitable for signal path filtering
• Compact 0603 surface-mount footprint for space-constrained designs

Applications

• Digital audio line noise filtering
• Class D amplifier noise suppression
• EMI/EMC compliance in consumer electronics

Procurement Notes

Verify the complete part number including suffixes against official Murata documentation to ensure correct impedance and packaging specifications. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Cross-reference datasheet parameters such as impedance frequency characteristics and current ratings with your circuit design constraints before ordering.

Selection Notes

Select this component when high current handling up to 1.1 A is required alongside significant attenuation at 100 MHz. The low DC resistance minimizes voltage drop in power or signal lines. Ensure the 0603 package size fits within the available PCB real estate. Consider thermal management capabilities within the specified -55°C to +125°C operating range for reliable performance.

Part Context

This component belongs to Murata's NFZ series of ferrite beads, which are passive EMI filters. The NFZ series offers various impedance values and current ratings in standard metric packages. These components are widely used in portable devices and automotive electronics for suppressing high-frequency noise without affecting signal integrity.

Replacement Considerations

Consult Murata's official substitution guide for equivalent parts within the NFZ series. Verify that alternative components match the 250 Ohm impedance at 100 MHz, 1.1 A current rating, and 0603 package dimensions. Ensure compatibility with existing PCB footprints and soldering profiles.