Needs validationmedium risk
Strong electrical upgrade in a package closer in size to the target, but still requires redesign.
Best Alternatives to CY54-100UH
Finding a replacement for the CY54-100UH involves balancing electrical upgrades with physical constraints. While no direct drop-in alternatives exist, several functional alternatives offer superior current handling and efficiency in larger packages, requiring a board redesign.
AI replacement insight
Package riskhigh
No candidates match the target's 5.8x5.2mm package. Board redesign is required for all alternatives.
Electrical riskmedium
Target's saturation current is unknown. Candidate Isat must be verified against application's peak current.
Can it be replaced directly?
No, there are no direct, pin-compatible replacements for CY54-100UH among the candidates reviewed. All electrically suitable alternatives have a larger physical footprint.
Best replacement path
PSPMAA0605H-101M-IGF is the most promising functional alternative due to its strong electrical specs and the closest package size (6.6x7.1mm), though it still requires a board redesign.
Main risk
The primary risk is the package mismatch. All functional alternatives are physically larger than the target's 5.8x5.2mm package and require a PCB layout change.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | CY54-100UH | PSPMAA0605H-101M-IGF | PSPHAQ127-101M | PSPMAC1045H-101M-ANP | Compatibility / risk |
|---|---|---|---|---|---|
| Inductance | 100 µH | 100 µH | 100 µH | 100 µH | 100 µH — Inductance matches target.; PSPHAQ127-101M: Inductance matches target.; PSPMAC1045H-101M-ANP: Inductance matches target.; CY75-100UH: Inductance matches target. |
| Current | 0.51 A | 1.7 A | 1.7 A | 2.0 A | 1.7 A / 2.0 A / 0.73 A — Higher rated current is an upgrade.; PSPHAQ127-101M: Higher rated current is an upgrade.; PSPMAC1045H-101M-ANP: Significantly higher rated current is a major upgrade.; CY75-100UH: Higher rated current is an upgrade. |
| Dcr | 0.611 Ω | 0.43 Ω | 0.22 Ω | 0.25 Ω | 0.43 Ω / 0.22 Ω / 0.25 Ω / 0.325 Ω — Lower DCR improves efficiency.; PSPHAQ127-101M: Lower DCR improves efficiency.; PSPMAC1045H-101M-ANP: Lower DCR improves efficiency.; CY75-100UH: Lower DCR improves efficiency. |
| Saturation Current | Not specified | 2.0 A | - | 4.0 A | 2.0 A / 4.0 A — Strong Isat, but target value is unknown for comparison.; PSPMAC1045H-101M-ANP: Strong Isat, but target value is unknown for comparison. |
| Package | SMD, 5.8x5.2mm | 0605 (6.6x7.1mm) | 12x12mm | 1045 (10.2x10.6mm) | 0605 (6.6x7.1mm) / 12x12mm / 1045 (10.2x10.6mm) / SMD, 7.8x7.0mm — Larger package requires board redesign, but is closer in size.; PSPHAQ127-101M: Significantly larger package requires board redesign.; PSPMAC1045H-101M-ANP: Significantly larger package requires board redesign.; CY75-100UH: Larger package requires board redesign. |
Application & sourcing insights
Questions & answers
The best functional alternative is PSPMAA0605H-101M-IGF. It offers higher current ratings (1.7A IDC, 2.0A Isat) in a 6.6x7.1mm package, which is the closest in size to the original. However, this still requires a PCB redesign.