Is there a pin-compatible replacement for SMNR5040-2R2MT?

SWPA5040S2R2NT from Sunlord uses the same 5040 package and is likely pin-compatible. However, it is not a guaranteed drop-in replacement due to a different inductance tolerance (±30% vs ±20%), which must be evaluated.

What risks should I check before replacing SMNR5040-2R2MT?

Before replacing, check three key risks: 1) Package mismatch, as many alternatives will not fit the same PCB footprint. 2) Higher DC Resistance (DCR), which reduces efficiency. 3) Different inductance tolerance, which can affect power supply stability.

SMNR5040-2R2MT Alternatives, Datasheet & Cross Reference | SXN

SMNR5040-2R2MT is a 2.2µH, 4.9A shielded power inductor in a 5.0x5.0mm package, common in DC-DC converters. Finding a substitute involves matching inductance, current ratings, DCR, and physical size.

AI replacement insight

Package riskmedium

Many alternatives have different footprints and are not drop-in compatible.

Electrical risklow

Key parameters like inductance are common, but tolerance and DCR must be checked.

Can it be replaced directly?

No verified direct drop-in replacement exists. SWPA5040S2R2NT is the closest form-fit candidate but has a wider inductance tolerance that must be reviewed by an engineer.

Best replacement path

Use SWPA5040S2R2NT for a near drop-in, but verify the impact of its wider ±30% inductance tolerance. For new designs, consider higher-current parts which require a different PCB layout.

Main risk

The primary risk is substituting with a part that has a different package footprint or a wider inductance tolerance, which could affect PCB assembly and circuit performance.

Recommended alternatives

A form-fit alternative with higher current ratings but wider inductance tolerance.

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Alternative comparison matrix

Feature / factor	SMNR5040-2R2MT	SWPA5040S2R2NT	SMMS0630-2R2M	Compatibility / risk
Package	5040	5040	0630	5040 / 0630 — Same package code, likely form-fit compatible.; SMMS0630-2R2M: Larger package requires PCB redesign.
Inductance	2.2µH ±20%	2.2µH ±30%	-	2.2µH ±30% — Wider tolerance may affect circuit stability.
Saturation Current A	4.9A	5.5A	11.5A	5.5A / 11.5A — Higher saturation current provides more margin.; SMMS0630-2R2M: Significantly higher current handling.
Current A	3.8A	4.3A	-	4.3A — Higher heat rating current (Irms).
Dcr Ohm	19mΩ	19mΩ	16.5mΩ	19mΩ / 16.5mΩ — Identical typical DCR, no efficiency loss.; SMMS0630-2R2M: Lower DCR improves efficiency.

Application & sourcing insights

Questions & answers

SWPA5040S2R2NT is a strong candidate. It shares the same 5040 package and offers better current ratings, but its wider inductance tolerance of ±30% requires engineering verification for your specific application.