Is there a pin-compatible replacement for SMNR4030-6R8MT?

PNLS4030-4R7M from DMBJ shares the same 4030 package and pinout, but has a lower inductance (4.7µH vs 6.8µH) and a narrower temperature range, which must be verified for your application.

What risks should I check before replacing SMNR4030-6R8MT?

Key risks include package size mismatch requiring PCB redesign, inductance value changes affecting circuit stability, and using an unshielded part which can cause EMI problems. Always verify DCR, saturation current, and temperature range.

SMNR4030-6R8MT Alternatives, Datasheet & Cross Reference | SXN

The SXN SMNR4030-6R8MT is a 6.8µH shielded power inductor in a compact 4030 package, suitable for DC-DC converters. Finding a direct replacement requires matching inductance, current ratings, and physical size.

AI replacement insight

Electrical riskhigh

Inductance, current, and temperature ratings often differ.

Package riskmedium

Many functional alternatives are in different packages.

Sourcing risklow

Power inductors are a common component type.

Can it be replaced directly?

There is no verified direct, drop-in replacement for the SMNR4030-6R8MT. All potential substitutes require careful review of electrical and physical specifications.

Best replacement path

Evaluate same-package alternatives like DMBJ's PNLS4030 series, but expect parametric differences like inductance. No direct drop-in has been found.

Main risk

The primary risk is finding a part that matches the target's combination of 6.8µH inductance, 2.75A saturation current, and shielded 4030 package.

Recommended alternatives

Same package size but with lower inductance and a more restricted temperature range; requires circuit validation.

View details

Alternative comparison matrix

Feature / factor	SMNR4030-6R8MT	PNLS4030-4R7M 4.7UH	SMMS1050-6R8M	SM5845-6R8MT	Compatibility / risk
Package	4030	4030	1050 (11.5x10.0mm)	SMD (5.8x5.2mm)	4030 / 1050 (11.5x10.0mm) / SMD (5.8x5.2mm) — Same package size.; SMMS1050-6R8M: Requires board redesign.; SM5845-6R8MT: Larger package requires redesign.
Inductance	6.8µH	4.7µH	6.8µH	6.8µH	4.7µH / 6.8µH — Lower inductance will affect circuit operation.; SMMS1050-6R8M: matched; SM5845-6R8MT: matched
Temperature	-40°C to +125°C	-40°C to +85°C	-	-	-40°C to +85°C — Reduced max operating temperature.
Saturation Current A	2.75A	2.9A	12.0A	3.0A	2.9A / 12.0A / 3.0A — Slightly higher current rating.; SMMS1050-6R8M: Significantly higher current handling.; SM5845-6R8MT: Slightly higher current rating.
Dcr Ohm	0.090Ω	-	0.028Ω	-	0.028Ω — Lower DCR improves efficiency.
Shielding	Shielded	-	-	Unshielded	Unshielded — Poses EMI risk.

Application & sourcing insights

Questions & answers

No direct drop-in replacement has been identified. Alternatives exist with different packages or electrical parameters, such as PNLS4030-4R7M, which has a lower inductance but matches the package size. All candidates require engineering review.