Is there a pin-compatible replacement for SWPA4020S3R3MT?

MDA4020-3R3M shares the same 4020 package and is likely pin-compatible, but verification is required. Its saturation current is slightly lower, so it is not a direct drop-in replacement without reviewing the circuit's current requirements.

What risks should I check before replacing SWPA4020S3R3MT?

Key risks include: 1) Package dimensions (length, width, and especially height). 2) Saturation current (Isat), which must meet or exceed your circuit's peak current. 3) DC Resistance (DCR), which affects efficiency and heat generation.

SWPA4020S3R3MT Alternatives, Datasheet & Cross Reference | Shenzhen Sunlord Electronics Co., Ltd.

Finding a replacement for the Sunlord SWPA4020S3R3MT 3.3µH inductor involves matching its 4020 package, 3.2A current rating, and low DCR. Alternatives exist but require careful review of electrical and mechanical specifications.

AI replacement insight

Package riskhigh

Many alternatives have different footprints or heights.

Electrical riskmedium

Saturation current and DCR can vary, impacting performance.

Can it be replaced directly?

No verified direct drop-in replacement has been identified. MDA4020-3R3M is a form-fit match but has a lower saturation current (3.1A vs 3.2A) and requires engineering review.

Best replacement path

Find a part in a 4020 package with Isat ≥ 3.2A. MDA4020-3R3M is a close fit but requires checking current margin. SMNR4030-3R3MT is an upgrade if a taller part fits.

Main risk

The main risks are mechanical incompatibility from different package sizes and electrical degradation from lower current ratings.

Recommended alternatives

Form-factor compatible alternative with similar inductance but slightly lower current rating.

View details

Alternative comparison matrix

Feature / factor	SWPA4020S3R3MT	MDA4020-3R3M	SMNR4030-3R3MT	Compatibility / risk
Package	4020	4020	4030	4020 / 4030 — Package size matches target.; SMNR4030-3R3MT: Package is taller (3.0mm vs 2.0mm).
Current	3.2 A	3.1 A	3.3 A	3.1 A / 3.3 A — Saturation current is slightly lower.; SMNR4030-3R3MT: Higher saturation current.
Dcr	70 mΩ	65 mΩ	40 mΩ	65 mΩ / 40 mΩ — Lower DCR improves efficiency.; SMNR4030-3R3MT: Significantly lower DCR improves efficiency.
Temperature	-40°C to +125°C	-55°C to +155°C	-40°C to +125°C	-55°C to +155°C / -40°C to +125°C — Wider operating temperature range.; SMNR4030-3R3MT: Operating temperature range matches.

Application & sourcing insights

Questions & answers

MDA4020-3R3M is a strong candidate due to its matching 4020 package, but its 3.1A saturation current is slightly lower than the original's 3.2A. For applications that can accommodate a taller component, SMNR4030-3R3MT offers superior electrical performance.