Is there a pin-compatible replacement for SMNR6045-150MT?

VLS6045EX-150M from TDK is a form-fit-function replacement in the same 6045 package. While its footprint is compatible, its slightly higher DCR means it's not a guaranteed drop-in and requires engineering review.

What risks should I check before replacing SMNR6045-150MT?

First, verify the package dimensions and land pattern match. Second, ensure the replacement's inductance is 15µH. Third, confirm its saturation (Isat) and RMS (Irms) current ratings are equal to or greater than 2.5A and 2.05A, respectively. Finally, check that the DC Resistance (DCR) is not significantly higher to avoid efficiency loss and overheating.

SMNR6045-150MT Alternatives, Datasheet & Cross Reference | SXN

SMNR6045-150MT is a 15µH shielded power inductor in a 6.0x6.0mm package, commonly used in DC-DC converters. Finding a replacement requires matching inductance, current ratings, and package size.

AI replacement insight

Package riskhigh

Many alternatives have different footprints, requiring a board spin.

Electrical riskmedium

DCR and current ratings must be carefully checked to avoid overheating or saturation.

Sourcing risklow

15µH inductors in this class are widely available from multiple vendors.

Can it be replaced directly?

No verified direct drop-in replacement is available without review. TDK's VLS6045EX-150M shares the same package and offers similar or better electrical performance, but its slightly higher DCR requires evaluation.

Best replacement path

Find an inductor with a 15µH inductance in a 6045 package, with current ratings (Isat > 2.5A, Irms > 2.05A) and DCR (≤ 0.068Ω) that are equal or better. TDK's VLS6045EX-150M is a strong candidate.

Main risk

The main risks are package incompatibility, which requires a PCB redesign, and electrical mismatches in inductance or current handling, which can affect circuit performance and reliability.

Recommended alternatives

Strong alternative in the same 6045 package with higher current ratings but slightly higher DCR.

View details

Alternative comparison matrix

Feature / factor	SMNR6045-150MT	VLS6045EX-150M	SWPA8040S150MT	Compatibility / risk
Package	6045 (6.0x6.0x4.5mm)	6045 (6.0x6.0x4.5mm)	8040 (8.0x8.0mm)	6045 (6.0x6.0x4.5mm) / 8040 (8.0x8.0mm) — Package dimensions match.; SWPA8040S150MT: Larger footprint requires PCB redesign.
Inductance	15 µH	15 µH	15 µH	15 µH — Inductance value matches.; SWPA8040S150MT: Inductance value matches.
Saturation Current A	2.5 A	3.1 A	3.4 A	3.1 A / 3.4 A — Higher saturation current provides more margin.; SWPA8040S150MT: Higher saturation current.
Current A	2.05 A	2.5 A	-	2.5 A — Higher RMS current rating.
Dcr Ohm	0.068 Ω	0.075 Ω	0.047 Ω	0.075 Ω / 0.047 Ω — Slightly higher DCR may reduce efficiency.; SWPA8040S150MT: Significantly lower DCR improves efficiency.

Application & sourcing insights

Questions & answers

TDK VLS6045EX-150M is a strong alternative. It has the same 6045 package, 15µH inductance, and higher current ratings, with only a slightly higher DCR that should be reviewed for thermal impact.