Original Part
120 Ohms @ 100 MHz 1 Power Line Ferrite Bead 0603 (1608 Metric) 3A 30mOhm
Alternative Part
100 Ohms @ 100 MHz 1 Power Line Ferrite Bead 0603 (1608 Metric) 3A 30mOhm
100 Ohms @ 100 MHz 1 Power Line Ferrite Bead 0603 (1608 Metric) 3A 30mOhm
1. UPZ1608E101-3R0TF Substitution Conclusion
This part matches the original WLBD1608HCU121TL in key parameters such as current rating (3A), DC resistance (30mΩ), and package (0603). The differences lie in its impedance at 100 MHz, which is 100 Ω (a reduction of 20 Ω compared to the original 120 Ω), and a slightly longer body length of 1.65mm (original: 1.60mm). The lower impedance results in weaker noise suppression at 100 MHz, potentially affecting high-frequency filtering performance. If the application is sensitive to noise at this specific frequency, the performance degradation must be evaluated. Although the dimensional variance is minor, PCB pad compatibility should be verified. While the 0603 package typically has tolerances that may accommodate this, it could increase assembly risk. Substitution can be considered for applications with relaxed impedance tolerance and PCB layouts that can adapt to minor size changes, but bench validation of filtering performance is recommended.
2. WLBD1608HCU101TL Substitution Conclusion
This part is from the same manufacturer (Walsin) as the original WLBD1608HCU121TL. Apart from the impedance at 100 MHz being 100 Ω (a reduction of 20 Ω compared to the original 120 Ω), all other parameters—including dimensions (1.60mm x 0.80mm), current rating (3A), DC resistance (30mΩ), and package (0603)—are identical. The reduced impedance directly leads to decreased noise suppression capability at 100 MHz, which may fail to meet original performance requirements in applications demanding strict filtering at this frequency. Given the consistency in all other parameters, mechanical and electrical compatibility post-substitution is excellent, and reliability is more predictable. If the application permits a slightly lower impedance value and high-frequency filtering requirements are not critical, this presents a more straightforward and lower-risk alternative.
Analysis ID: DB41-4438000
Based on part parameters and for reference only. Not to be used for procurement or production.
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