Is there a pin-compatible replacement for SMDRI127-680MT?

Yes, several inductors share the same 12.3x12.3mm footprint. For example, Sumida's CDRH127L125NP-680MC is a form-fit match, but you must verify electrical parameters like saturation current to ensure it's a functional drop-in for your circuit.

What risks should I check before replacing SMDRI127-680MT?

Key risks include: 1) Electrical Stress: Ensure the replacement's saturation (Isat) and RMS (Irms) current ratings are sufficient for your application's peak and continuous currents. 2) Package Fit: Verify the height and land pattern match your PCB layout. 3) Performance: A different DCR can affect efficiency.

SMDRI127-680MT Alternatives, Datasheet & Cross Reference | SXN

SMDRI127-680MT is a shielded 68uH power inductor in a 12.3x12.3x8.0mm package, suitable for DC-DC converters. When seeking alternatives, key parameters to match are inductance, current ratings, and DCR.

AI replacement insight

Electrical riskmedium

Substitutes may have lower current ratings, especially saturation current.

Package risklow

Footprints are consistent, but height can vary. Verify Z-axis clearance.

Can it be replaced directly?

No perfect drop-in replacement was found. The closest alternatives have variations in current ratings or package dimensions that require engineering review.

Best replacement path

The Sumida CDRH127L125NP-680MC offers an upgrade in most areas (DCR, Irms, AEC-Q200) but requires checking if the slightly lower saturation current is acceptable.

Main risk

The primary risk is using a substitute with a lower saturation current (Isat), which can lead to inductor saturation, high current spikes, and potential circuit failure under peak load.

Recommended alternatives

AEC-Q200 qualified alternative with matching inductance and package, lower DCR, and higher thermal current rating.

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Alternative comparison matrix

Feature / factor	SMDRI127-680MT	CDRH127L125NP-680MC	SMDRI125-680MT	Compatibility / risk
Inductance	68 uH	68 µH	68 uH	68 µH / 68 uH — Inductance matches.; SMDRI125-680MT: Inductance matches.
Current	2.1 A	2.6 A	1.5 A	2.6 A / 1.5 A — Temperature rise current is higher.; SMDRI125-680MT: Temperature rise current is lower.
Resistance	140 mΩ Max	111.5 mΩ	120 mΩ	111.5 mΩ / 120 mΩ — DCR is lower, improving efficiency.; SMDRI125-680MT: DCR is slightly lower (better).
Package	12.3mm x 12.3mm	12.3mm x 12.3mm	12.3x12.3x6.0mm	12.3mm x 12.3mm / 12.3x12.3x6.0mm — Package footprint matches. Height assumed to match (8.0mm).; SMDRI125-680MT: Package height is shorter (6.0mm vs 8.0mm).
Application	Commercial	AEC-Q200	-	AEC-Q200 — Candidate is automotive qualified.

Application & sourcing insights

Questions & answers

CDRH127L125NP-680MC by Sumida is a strong candidate. It matches the 68uH inductance and package, offers better DCR and thermal current, and is AEC-Q200 qualified, but has a slightly lower saturation current (3.1A vs 4A).