Original Part
120 Ohms @ 100 MHz 1 Ferrite Bead 0603 (1608 Metric) 1.3A 150mOhm
Alternative Part
120 Ohms @ 100 MHz 1 Signal Line Ferrite Bead 0603 (1608 Metric) 1.3A 140mOhm
120 Ohms @ 100 MHz 1 Power Line Ferrite Bead 0603 (1608 Metric) 2A 55mOhm
1. MZAS1608G121-1R3TF Substitution Conclusion
Viable as a direct replacement for signal line applications. This part's core parameters (impedance @ frequency, rated current, package size) are identical to the original part. Its DC resistance (DCR=140mΩ) is superior to the original's 150mΩ. The primary distinction is its explicit designation as a "signal line" ferrite bead, indicating its design and characteristics are optimized for signal filtering. For instance, its impedance attenuation curve in the higher frequency range (e.g., >100MHz) likely better aligns with signal integrity requirements. For use on signal lines (e.g., data, clock lines), its high-frequency noise suppression performance can be considered equivalent or superior to the Original Part. However, if used in a power path, while its current rating is sufficient, its DCR is still relatively high compared to dedicated power beads. This could lead to slight additional voltage drop and heating, requiring evaluation based on the specific circuit.
2. HPZ1608U121-2R0TF Substitution Conclusion
Requires careful evaluation; not recommended as a general-purpose replacement. While this part shares the same impedance @ frequency and is package-compatible, two key differences exist: first, its rated current is significantly higher (2A vs. 1.3A), and second, it features a very low DC resistance (55mΩ vs. 150mΩ). It is explicitly designated as a "power line" bead. This is a high-current, low-loss component designed for power rails, with its core material and frequency-impedance profile typically optimized for the power noise spectrum. This may result in different attenuation characteristics in the high-frequency range (e.g., several hundred MHz and above) required for signal lines compared to the original general-purpose bead. Direct substitution could alter the circuit's high-frequency noise suppression performance. On signal lines, it might provide "insufficient filtering," while on power lines, its performance is redundant and potentially more costly. Consideration is advised only if the original application is confirmed to be power rail filtering and the current requirement is close to 1.3A.
Analysis ID: 87C5-9F47000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com