Is there a pin-compatible replacement for SMNR5040-220MT?

NR5040S220MT and NR5040-220MTSX01 share the same 5040 package and are expected to be pin-compatible. However, always verify the land pattern from the datasheet before layout or assembly.

What risks should I check before replacing SMNR5040-220MT?

The main risk is increased power loss and heat due to higher DC Resistance (DCR). Candidates may have slightly higher DCR than the original part, impacting efficiency. Always check the datasheet values.

SMNR5040-220MT Alternatives, Datasheet & Cross Reference | SXN

SMNR5040-220MT is a 22µH shielded power inductor in a 5040 package. When seeking alternatives, focus on matching inductance, current ratings (Isat/Irms), and DC resistance (DCR) to ensure circuit performance and efficiency.

AI replacement insight

Electrical risklow

Candidates have slightly higher DCR, which can affect efficiency. Current ratings are equal or better.

Package risklow

All viable candidates share the same 5040 package and are expected to be pin-compatible.

Can it be replaced directly?

NR5040S220MT is a very close functional match, with identical key ratings except for a slightly higher DCR. It is a strong candidate for a direct replacement after verifying efficiency impact.

Best replacement path

NR5040-220MTSX01 offers an upgrade in current handling, making it a robust choice for new designs or to improve load tolerance.

Main risk

The primary risk is a potential increase in power loss and component temperature due to higher DC Resistance (DCR) in some alternatives.

Recommended alternatives

A form-fit-function alternative with matching inductance and current ratings in the same 5040 package.

View details

Alternative comparison matrix

Feature / factor	SMNR5040-220MT	NR5040S220MT	NR5040-220MTSX01	Compatibility / risk
Inductance	22µH	22µH	22µH	22µH — Inductance matches target.; NR5040-220MTSX01: Inductance matches target.
Saturation Current A	1.6A	1.6A	1.85A	1.6A / 1.85A — Saturation current matches target.; NR5040-220MTSX01: Higher saturation current provides more headroom.
Current A	1.5A	1.5A	1.8A	1.5A / 1.8A — RMS current matches target.; NR5040-220MTSX01: Higher RMS current rating.
Dcr Ohm	0.129Ω typ	0.168Ω max	0.160Ω max	0.168Ω max / 0.160Ω max — Higher DCR may increase power loss.; NR5040-220MTSX01: Higher DCR may increase power loss.
Package	5040	5040	5040	5040 — Package size matches.; NR5040-220MTSX01: Package size matches.

Application & sourcing insights

Questions & answers

NR5040-220MTSX01 is a strong candidate, offering higher current ratings (1.85A Isat, 1.8A Irms) which can be an upgrade. However, verify its slightly higher DCR is acceptable for your design's efficiency.