ACML-0603-101-T Replacement: ACML-0603-800-T, Z0603C121BSMST

Original Part

ACML-0603-101-T

Abracon LLC

100 Ohms @ 100 MHz 1 Ferrite Bead 0603 (1608 Metric) 200mA 200mOhm

Alternative Part

ACML-0603-800-T

Abracon LLC

80 Ohms @ 100 MHz 1 Ferrite Bead 0603 (1608 Metric) 200mA 160mOhm

Z0603C121BSMST

KEMET

120 Ohms @ 100 MHz 1 Signal Line Ferrite Bead 0603 (1608 Metric) 350mA 200mOhm

1. ACML-0603-800-T Substitution Conclusion The ACML-0603-800-T can serve as a conditional substitute for the original part, with a reduction in its core filtering impedance being the primary technical trade-off. It is from the same manufacturer and features an identical package footprint, along with a lower DC resistance (DCR) of 160mΩ compared to 200mΩ, which is beneficial for reducing DC voltage drop and power dissipation. However, its key parameter—impedance at 100MHz—drops from 100Ω to 80Ω, resulting in approximately 20% lower noise suppression around the target frequency. This may lead to filtering performance falling short of the original design intent. Consequently, it may not be suitable for circuits with stringent electromagnetic interference (EMI) filtering requirements or those relying on precise resonance points. In general decoupling applications where impedance tolerance is wider or lower DCR is prioritized, this substitution is acceptable.

2. Z0603C121BSMST Substitution Conclusion The Z0603C121BSMST can serve as a high-performance, high-reliability alternative to the original part, though the impact of its increased impedance on filtering characteristics must be considered. This part is fully package-compatible with the original and offers a significant upgrade in current rating (350mA vs. 200mA) while maintaining the same DCR (200mΩ), providing better overload margin and long-term reliability. The main deviation is the impedance increase from 100Ω to 120Ω. This results in a steeper attenuation curve for high-frequency filtering, offering stronger suppression around 100MHz, but may also shift the filter's peak frequency. It is well-suited for signal line applications (noted as "Signal Line" in its description) that demand higher current handling and stronger filtering. However, in designs where the original 100Ω impedance is critically matched—such as for impedance matching or specific frequency attenuation—the filtering performance should be re-evaluated.

Analysis ID: 3486-E4B3000

Based on part parameters and for reference only. Not to be used for procurement or production.