Is there a pin-compatible replacement for NRS4018T220MDGJ?

While several parts like SPH4018H220MT share the 4018 package, no replacement has been fully verified as pin-to-pin compatible without caveats. Engineering review of the datasheet is required to confirm the footprint and performance.

What risks should I check before replacing NRS4018T220MDGJ?

Check three key parameters: 1) Saturation Current (Isat) must be ≥0.9A. 2) RMS Current (Irms) must be ≥0.72A to prevent overheating. 3) DC Resistance (DCR) should be as low as possible (≤0.29Ω) to maintain efficiency.

NRS4018T220MDGJ Alternatives, Datasheet & Cross Reference | TAIYO YUDEN

NRS4018T220MDGJ is a 22µH shielded power inductor in a compact 4018 package. When seeking alternatives, key considerations are matching the 4.0x4.0mm footprint and ensuring current ratings (Isat ≥ 0.9A, Irms ≥ 0.72A) are met.

AI replacement insight

Electrical riskhigh

Using parts with lower current ratings can cause failure under load.

Package riskmedium

Many alternatives have different footprints, requiring PCB redesign.

Can it be replaced directly?

No verified direct drop-in replacement was found. SPH4018H220MT is a strong form-fit-function candidate requiring engineering review.

Best replacement path

SPH4018H220MT offers the same package and saturation current, but requires review for its slightly lower RMS current and higher DCR.

Main risk

The main risk is using a part with lower current ratings (Isat/Irms) or higher DCR, which can lead to saturation, overheating, or reduced efficiency.

Recommended alternatives

Shares the same 4018 package and saturation current, but has slightly weaker RMS current and higher DCR.

View details

Alternative comparison matrix

Feature / factor	NRS4018T220MDGJ	SPH4018H220MT	SWPA4018S220MT	Compatibility / risk
Package	4018	4018	4018	4018 — Same package size (4.0x4.0mm).; SWPA4018S220MT: Same package size (4.0x4.0mm).
Saturation Current A	0.9 A	0.9 A	0.8 A	0.9 A / 0.8 A — Saturation current matches target.; SWPA4018S220MT: Saturation current is lower than target's 0.9A.
Current A	0.72 A	0.7 A	0.59 A	0.7 A / 0.59 A — RMS current is slightly lower than target's 0.72A.; SWPA4018S220MT: RMS current is significantly lower than target's 0.72A.
Dcr Ohm	0.29 Ω	0.348 Ω	0.468 Ω	0.348 Ω / 0.468 Ω — DC Resistance is higher, indicating lower efficiency.; SWPA4018S220MT: Max DCR is significantly higher, indicating lower efficiency.
Pin Count	2	null	-	null — Pin count is missing from data, requires datasheet verification.

Application & sourcing insights

Questions & answers

SPH4018H220MT is a strong candidate with the same package and saturation current. However, its slightly lower RMS current (0.7A vs 0.72A) and higher DCR require verification for your specific application.