Z0603C121ASMST

Overview

The KEMET Z0603C121ASMST is a single-line ferrite bead from the Z-SMS series, designed for signal line noise suppression. It features a 0603 (1608 metric) surface-mount package with dimensions of 1.60mm x 0.80mm and a maximum height of 0.95mm. The component provides an impedance of 120 Ohms at 100 MHz and has a DC resistance (DCR) of 180 milliohms maximum. It supports a rated current of 500mA and operates within a temperature range of -55°C to 125°C.

Feature Summary

• Provides effective electromagnetic interference (EMI) filtering for high-speed digital signals
• Compact 0603 footprint suitable for space-constrained surface-mount applications
• Low DC resistance minimizes voltage drop in power or signal paths

Applications

• Noise suppression on high-speed data lines
• Filtering in portable electronic devices
• Signal integrity improvement in consumer electronics

Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS3 compliance and MSL rating during sourcing. Check for valid replacement parts if long-term supply stability is required for production.

Selection Notes

Select this component when low-profile EMI filtering is needed for signals up to 500mA. Ensure the 120 Ohm impedance at 100 MHz matches the target noise frequency spectrum. Verify thermal and current ratings against circuit requirements.

Part Context

This ferrite bead belongs to KEMET's Z-SMS series, which focuses on compact noise suppression solutions. It is part of the broader Z0603C family of 0603-sized components designed for general-purpose signal line protection in modern electronic assemblies.

Replacement Considerations

TDK MMZ1608S121ATA00 is listed as a similar substitute part number.