NFZ18SM251SZ10D

Overview

The NFZ18SM251SZ10D is a single-channel chip noise filter manufactured by Murata Electronics, belonging to the EMIFIL series. It utilizes an unshielded design within a compact 0603 (1608 metric) surface-mount package measuring 1.6 mm in length, 0.8 mm in width, and 0.8 mm in height. The component provides an impedance of 250 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 1.1 A and exhibits a maximum DC resistance of 190 mOhms. The device operates reliably within a temperature range of -55°C to +125°C.

Feature Summary

• Provides electromagnetic interference suppression through high-impedance characteristics at specific frequencies
• Features an unshielded construction suitable for standard surface-mount assembly processes
• Designed for stable performance across a wide industrial temperature operating range

Applications

• General-purpose EMI filtering in electronic circuits
• Signal line noise suppression in consumer electronics
• Power line filtering for low-current applications

Procurement Notes

Verify the exact part number against official Murata documentation to ensure correct impedance and current ratings. Confirm RoHS compliance status and packaging options such as reel or cut tape availability directly with authorized distributors. Ensure that the selected variant matches the required 0603 footprint and thermal specifications for the target application environment.

Selection Notes

Select this component when a 250 Ohm impedance at 100 MHz is required for noise attenuation. Ensure the circuit current does not exceed 1.1 A to prevent overheating. Verify that the 190 mOhms DC resistance meets voltage drop requirements. Consider the unshielded nature if adjacent sensitive components are present. Confirm compatibility with standard SMT reflow profiles.

Part Context

This ferrite bead belongs to Murata's NFZ series of chip noise filters. These components are engineered for suppressing electromagnetic interference in compact electronic devices. The 0603 package size allows for dense PCB layouts. The product is distinct from other Murata lines like BLM or GCG, which serve different electrical functions or have varying physical dimensions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Cross-referencing requires matching impedance, current rating, and package dimensions using official manufacturer substitution guides.