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Best Alternatives to SM3521-680MT

Package: SM3521SXNChokesInductance: 68 µHTolerance: ±20%Saturation Current: 400 mATemperature Rise Current: 260 mADC Resistance (DCR): 2.0 Ω Max

SM3521-680MT is a 68µH unshielded power inductor from SXN. While many parts offer better electrical performance, finding a direct drop-in replacement is challenging due to its unique package.

AI replacement insight

Package riskhigh

No known drop-in package match; PCB redesign is required.

Electrical risklow

Many alternatives offer significantly better current and DCR ratings.

Sourcing riskmedium

The original part's non-standard package limits second sources.

Can it be replaced directly?

No direct, pin-compatible replacement for SM3521-680MT is currently known. All suitable alternatives require a board layout modification.

Best replacement path

Select a functional alternative with superior electrical specs and redesign the PCB layout to accommodate the new package.

Main risk

Package mismatch is the main risk, making a PCB redesign necessary for any replacement.

Recommended alternatives

6
PNLS6045-680M 68UH package
PNLS6045-680M 68UH

DMBJ

Needs validationmedium risk

A 68µH inductor from DMBJ with 1.6A saturation current. Its 6045 package requires a board layout change.

View details

Alternative comparison matrix

Feature / factorSM3521-680MTPNLS6045-680M 68UHSM7850-680MTSMDRH104R-680MTCompatibility / risk
Inductance68µH68µH68µH68µH68µH — Inductance matches target value.; SM7850-680MT: Inductance matches target value.; SMDRH104R-680MT: Inductance matches target value.; SMMS1050-680M: Inductance matches target value.
Current0.4A1.6A1.12A2.08A1.6A / 1.12A / 2.08A / 3.0A — Significantly higher saturation current.; SM7850-680MT: Higher saturation current.; SMDRH104R-680MT: Significantly higher saturation current.; SMMS1050-680M: Significantly higher saturation current.
Dcr2.0Ω0.33Ω0.208Ω0.213Ω0.33Ω / 0.208Ω / 0.213Ω / 0.19Ω — Significantly lower DCR improves efficiency.; SM7850-680MT: Significantly lower DCR improves efficiency.; SMDRH104R-680MT: Significantly lower DCR improves efficiency.; SMMS1050-680M: Significantly lower DCR improves efficiency.
PackageSM35216045785010.3x10.3mm6045 / 7850 / 10.3x10.3mm / 1050 — Different package requires PCB redesign.; SM7850-680MT: Different package requires PCB redesign.; SMDRH104R-680MT: Different package requires PCB redesign.; SMMS1050-680M: Different package requires PCB redesign.
ShieldingUnshielded-Unshielded-Unshielded — Same unshielded construction.

Application & sourcing insights

Questions & answers

Parts like SXN's SMNR8040-680MT or DMBJ's PNLS6045-680M offer superior current handling and lower DCR. However, all require a PCB redesign due to different packages.