Is there a pin-compatible replacement for SWPA4030S100MT?

There is no officially verified pin-to-pin replacement. However, Sunlord's WPN4020H100MT shares the same 4.0mm x 4.0mm land pattern and is a strong candidate for a form-fit replacement, pending verification of its lower height (2.0mm vs 3.0mm).

What risks should I check before replacing SWPA4030S100MT?

First, verify the package footprint and height; most alternatives are larger and require a new PCB layout. Second, check the DCR; a higher value increases power loss. Finally, ensure the upgraded current ratings (Isat and Irms) are compatible with your design.

SWPA4030S100MT Alternatives, Datasheet & Cross Reference | Shenzhen Sunlord Electronics Co., Ltd.

Finding a replacement for the Sunlord SWPA4030S100MT 10µH inductor involves balancing package size and electrical performance. While several functional upgrades exist, only a few match the 4x4mm footprint.

AI replacement insight

Package riskhigh

Most alternatives are larger and require a new PCB layout. Even the best match has a different height.

Electrical risklow

Most candidates offer superior current handling and similar or lower DCR.

Can it be replaced directly?

No verified direct drop-in replacement exists. WPN4020H100MT is a likely form-fit match with a lower profile that requires engineering review.

Best replacement path

Sunlord's WPN4020H100MT offers the same 4x4mm footprint and upgraded current ratings, making it the strongest candidate, though its lower profile and higher DCR must be checked.

Main risk

The primary risk is physical incompatibility, as most alternatives have larger package footprints requiring PCB redesign.

Recommended alternatives

Strongest candidate with same 4x4mm footprint, upgraded currents, but lower profile and higher DCR.

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Alternative comparison matrix

Feature / factor	SWPA4030S100MT	WPN4020H100MT	VLS6045EX-100M	Compatibility / risk
Package	4030 (4x4x3mm)	4020 (4x4x2mm)	6.0mm x 6.0mm	4020 (4x4x2mm) / 6.0mm x 6.0mm — Same footprint, lower profile. Verify clearance.; VLS6045EX-100M: Larger footprint requires PCB redesign.
Saturation Current A	1.95A	2.8A	3.9A	2.8A / 3.9A — Higher saturation current provides more margin.; VLS6045EX-100M: Significant upgrade.
Current A	1.5A	2.35A	3.4A	2.35A / 3.4A — Higher heat rating current allows for more power.; VLS6045EX-100M: Significant upgrade.
Dcr Ohm	0.13Ω	0.18Ω	0.047Ω	0.18Ω / 0.047Ω — Slightly higher DCR may increase power loss.; VLS6045EX-100M: Significantly lower DCR improves efficiency.

Application & sourcing insights

Questions & answers

The Sunlord WPN4020H100MT is the best alternative, offering a matching 4x4mm footprint, higher current ratings, and a lower profile. Its slightly higher DCR should be evaluated for thermal impact.