Original Part
120 Ohms @ 100 MHz 1 Ferrite Bead 0603 (1608 Metric) 400mA 250mOhm
Alternative Part
100 Ohms @ 100 MHz 1 Ferrite Bead 0603 (1608 Metric) 400mA 200mOhm
120 Ohms @ 100 MHz 1 Power Line Ferrite Bead 0603 (1608 Metric) 400mA 250mOhm
1. FB03YTYN101 Substitution Conclusion
Direct substitution is not recommended. While this component shares the same package, current rating, and manufacturer as the original part, its core parameters present a critical deviation: its impedance at 100MHz is 100Ω, lower than the original's 120Ω, and its maximum DC resistance (DCR) of 200mΩ is slightly better. Near the target frequency (100MHz), the device's attenuation of high-frequency noise will be reduced, potentially failing to meet the intended filtering performance of the original design. This difference in key electrical performance is the primary factor affecting substitution feasibility.
2. FCB-0603-121A Substitution Conclusion
Substitution is acceptable. This part's key electrical parameters are identical to the original part: impedance (120Ω @ 100MHz), rated current (400mA), and maximum DCR (250mΩ). The main differences are the alternate manufacturer, a slight height increase of 0.05mm (within typical placement process tolerances), and its explicit designation as a "Power Line" filter, indicating possible optimization for power supply filtering applications. These variations do not impact its fundamental electrical function or physical installation, making it a viable substitute.
Analysis ID: 6733-0038000
Based on part parameters and for reference only. Not to be used for procurement or production.
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