NFZ18SM121SZ10D

Overview

The NFZ18SM121SZ10D is a single-channel chip noise filter manufactured by Murata Electronics, belonging to the EMIFIL NFZ series. It utilizes an unshielded ferrite bead design housed in a compact 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 maintains a maximum DC resistance of 140 mOhms. The device operates within a temperature range of -55°C to +125°C.

Feature Summary

• Provides effective electromagnetic interference suppression through high-impedance ferrite characteristics at 100 MHz.
• Features an unshielded construction suitable for standard signal line filtering applications.
• Designed for surface-mount assembly using SMD/SMT termination types.

Applications

• Signal line noise filtering in electronic circuits
• EMI suppression for embedded processors and controllers
• High-frequency noise attenuation in consumer electronics

Procurement Notes

Verify the specific suffix 'Z' against official Murata documentation to confirm tape and reel specifications or material variations. Confirm RoHS compliance status directly from the manufacturer datasheet before integration. Ensure the selected packaging format matches production requirements. Cross-reference the part number with authorized distributors to validate authenticity and traceability.

Selection Notes

Select this component when a 0603 footprint is required for space-constrained designs needing 120 Ohm impedance at 100 MHz. The 1.25 A current rating suits moderate power signal lines. Compare the 140 mOhms DCR against alternatives if lower insertion loss is critical. Verify thermal performance within the specified -55°C to +125°C operating range for the target environment.

Part Context

This component is part of the Murata EMIFIL NFZ series, which focuses on chip noise filters for EMI suppression. The NFZ series offers various impedance values and current ratings in standardized packages. This specific model represents a mid-range current solution in the widely used 0603 form factor, balancing size constraints with adequate noise filtering capabilities for general-purpose digital signals.

Replacement Considerations

NFZ18SM121SN10D shares identical electrical parameters and physical dimensions but may differ in packaging or suffix specifications. Verify functional equivalence and mechanical fit before substitution.

FAQ

What is the test frequency for the specified impedance?

The impedance of 120 Ohms is measured at a test frequency of 100 MHz.

Is the component shielded?

No, the NFZ18SM121SZ10D is an unshielded ferrite bead.