NFZ18SM121SN10D

Overview

The NFZ18SM121SN10D is a single-channel chip noise filter from the Murata EMIFIL NFZ series, designed for EMI suppression. 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 120 Ohms at a test frequency of 100 MHz with a tolerance of 25%. It supports a maximum DC current of 1.25 A and has a maximum DC resistance of 140 mOhms. The device operates within a temperature range of -55°C to +125°C.

Feature Summary

• Designed specifically for radiation noise suppression in audio lines and Class D amplifiers
• Features low DC resistance to minimize signal loss while maintaining effective filtering
• Constructed with exceptional solder heat resistance for reliable surface-mount assembly

Applications

• Radiation noise suppression for audio line circuits
• EMI filtering for Class D amplifier outputs
• Signal line noise reduction in compact electronic devices

Procurement Notes

Verify the specific suffix SN10D against official Murata documentation to confirm packaging and tape specifications. Ensure the selected variant matches the required 0603 footprint and electrical ratings for the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm current production status and RoHS compliance details before finalizing procurement orders.

Selection Notes

Select this component when a 0603 footprint is required for high-current noise filtering applications. The 1.25 A rating distinguishes it from lower-current variants in the same impedance class. Consider the -55°C to +125°C operating range for environments requiring wide thermal stability. Verify that the 120 Ohm impedance at 100 MHz aligns with the specific noise frequencies present in the circuit design.

Part Context

This component belongs to the Murata NFZ series of chip noise filters, which are engineered for suppressing electromagnetic interference in digital and analog circuits. The NFZ series utilizes multi-layer ferrite technology to provide effective noise absorption without significant signal degradation. These components are widely used in consumer electronics and automotive systems where space constraints and high performance are critical requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.