Is there a pin-compatible replacement for DFLS240L?

DFLS2100 from the same manufacturer uses the same PowerDI-123 package and is pin-compatible. However, its forward voltage is significantly higher (0.85V vs 0.50V), which is a critical electrical difference that must be evaluated for your application's thermal design.

What risks should I check before replacing DFLS240L?

When replacing DFLS240L, primarily check for: 1) Forward Voltage (Vf) mismatch, as a higher Vf increases heat and reduces efficiency. 2) Package and footprint compatibility to ensure it fits on your PCB without modification. 3) Current and voltage ratings must be equal or greater.

DFLS240L Alternatives, Datasheet & Cross Reference | FUXINSEMI

DFLS240L is a 40V, 2A Schottky rectifier in a PowerDI-123 package. While no direct drop-in replacement has been identified, several functional and parametric alternatives exist with key differences in performance or package that require engineering review.

AI replacement insight

Electrical riskmedium

One candidate has a higher forward voltage, increasing heat.

Package riskhigh

One candidate has a completely different package requiring a new PCB layout.

Sourcing risklow

Alternatives are from active manufacturers.

Can it be replaced directly?

No direct, drop-in replacement for DFLS240L has been confirmed. All candidates require review for either electrical or mechanical differences.

Best replacement path

The best path is to review DFLS2100, which shares the same package but has a higher forward voltage, or SR24W_R1_00001, which is electrically identical but requires a PCB redesign.

Main risk

The primary risks are increased power dissipation from higher forward voltage (Vf) or the need for a complete PCB layout change due to package incompatibility.

Recommended alternatives

A form-fit alternate with a higher voltage rating but significantly increased forward voltage, requiring thermal review.

View details

Alternative comparison matrix

Feature / factor	DFLS240L	DFLS2100	SR24W_R1_00001	Compatibility / risk
Package	PowerDI-123	PowerDI-123	SMA	PowerDI-123 / SMA — Package is a form-fit match.; SR24W_R1_00001: Package is not compatible and requires PCB redesign.
Voltage	40V	100V	40V	100V / 40V — Higher voltage rating provides more design margin.; SR24W_R1_00001: Voltage rating matches target.
Current	2A	2A	2A	2A — Average forward current matches target.; SR24W_R1_00001: Current rating matches target.
Forward Voltage	0.50V	0.85V	0.5V	0.85V / 0.5V — Significantly higher Vf will increase power loss and heat.; SR24W_R1_00001: Forward voltage at 2A matches target.
Temperature	Not specified, assumed narrower	-55°C to +175°C	-	-55°C to +175°C — Wider operating temperature range.

Application & sourcing insights

Questions & answers

DFLS2100 is a potential alternative in the same package but has a higher forward voltage, which increases power loss. SR24W_R1_00001 is an electrical match but in a different package (SMA), requiring a board change. Both require careful review.