Is there a pin-compatible replacement for SWPA4018S100MT?

SFE4018A-100M-F-HF uses the same 4x4x1.8mm package and is likely pin-compatible, but it has lower current ratings. SMNR4030-100MT has a compatible 4x4mm footprint but is taller (3.0mm vs 1.8mm). Always verify the datasheet landing pattern.

What risks should I check before replacing SWPA4018S100MT?

First, check physical dimensions (length, width, and height) to ensure the replacement fits. Second, verify key electrical parameters: saturation current (Isat) and RMS current (Irms) must meet or exceed your application's needs. Finally, check DC Resistance (DCR) as a higher value increases power loss.

SWPA4018S100MT Alternatives, Datasheet & Cross Reference | Shenzhen Sunlord Electronics Co., Ltd.

SWPA4018S100MT is a 10µH power inductor in a 4x4x1.8mm package. Key alternatives involve trade-offs in package size, height, and electrical ratings, requiring careful design review.

AI replacement insight

Package riskhigh

Most alternatives have a different footprint or height, requiring layout or clearance verification.

Electrical risklow

Several electrical upgrades exist, but one option is a downgrade that requires analysis.

Can it be replaced directly?

No verified direct drop-in replacement has been identified. SFE4018A-100M-F-HF shares the same package but has lower current ratings. SMNR4030-100MT has the same footprint but is taller.

Best replacement path

For an electrical upgrade with the same footprint, consider SMNR4030-100MT, but verify its greater height (3.0mm) is acceptable. For a potential drop-in with performance trade-offs, review SFE4018A-100M-F-HF.

Main risk

The primary risk is physical incompatibility. Many alternatives have different package sizes (footprint or height), requiring PCB layout changes or clearance checks.

Recommended alternatives

Electrical upgrade with same footprint but increased height; verify clearance.

View details

Alternative comparison matrix

Feature / factor	SWPA4018S100MT	SMNR4030-100MT	SWPA5020S100MT	SFE4018A-100M-F-HF	Compatibility / risk
Package	4x4x1.8mm	4x4x3.0mm	5020	4018	4x4x3.0mm / 5020 / 4018 — Same footprint, but taller.; SWPA5020S100MT: Larger footprint (5x5mm).; SFE4018A-100M-F-HF: Identical package code.
Saturation Current A	1.6A	1.95A	1.7A	1.3A	1.95A / 1.7A / 1.3A — Higher Isat offers more margin.; SWPA5020S100MT: Slightly higher Isat.; SFE4018A-100M-F-HF: Lower Isat reduces headroom.
Current A	1.06A	1.5A	1.55A	1.0A	1.5A / 1.55A / 1.0A — Higher Irms allows for more current.; SWPA5020S100MT: Higher Irms rating.; SFE4018A-100M-F-HF: Slightly lower Irms.
Dcr Ohm	0.18Ω	0.10Ω	0.11Ω	0.234Ω	0.10Ω / 0.11Ω / 0.234Ω — Lower DCR improves efficiency.; SWPA5020S100MT: Lower DCR improves efficiency.; SFE4018A-100M-F-HF: Higher DCR reduces efficiency.

Application & sourcing insights

Questions & answers

The best alternative depends on your design constraints. SMNR4030-100MT offers superior electrical performance with the same 4x4mm footprint but is taller. If size is flexible, SWPA5020S100MT is also an electrical upgrade in a 5x5mm package.