Is there a pin-compatible replacement for MSK240AW?

Yes, parts like the DSS36 are pin-compatible in the same SOD-123FL package. However, they are not electrically equivalent due to a much higher forward voltage, which requires careful thermal analysis before use.

What risks should I check before replacing MSK240AW?

The primary risk is increased heat. The MSK240AW has a very low forward voltage (0.43V). Most alternatives have a higher Vf (0.7V or more), which will increase power dissipation (P = Vf * I). Verify your design's thermal management can handle the extra heat.

MSK240AW Alternatives, Datasheet & Cross Reference | SHIKUES

Finding a replacement for the MSK240AW 50V 3A Trench MOS Schottky diode requires careful attention to its low forward voltage. While several diodes share the same SOD-123FL package, many have higher forward voltage, which can increase power loss.

AI replacement insight

Electrical riskhigh

Higher forward voltage will increase power dissipation, potentially leading to thermal failure.

Package risklow

Candidates share the same SOD-123FL package, ensuring mechanical compatibility.

Can it be replaced directly?

No direct, drop-in replacement has been identified. All reviewed candidates have a significantly higher forward voltage, which poses a thermal risk.

Best replacement path

Search for other Trench MOS or low-Vf Schottky diodes in a SOD-123FL package with at least 50V and 3A ratings. Pay close attention to the forward voltage (Vf) at 3A, aiming for a value close to the original's 0.43V.

Main risk

Increased power dissipation and thermal stress due to higher forward voltage (Vf) in substitute parts.

Recommended alternatives

A form-fit alternative with matching current but significantly higher forward voltage, posing a thermal risk.

View details

Alternative comparison matrix

Feature / factor	MSK240AW	DSS36	DSS310	Compatibility / risk
Package	SOD-123FL	SOD-123FL	SOD-123FL	SOD-123FL — Same package and pin count.; DSS310: Same package and pin count.
Voltage	50V	60V	100V	60V / 100V — Higher voltage rating provides more margin.; DSS310: Significantly higher voltage rating.
Current	3A	3A	3A	3A — Current rating matches the target.; DSS310: Current rating matches the target.
Forward Voltage	0.43V @ 3A	0.7V @ 3A	0.85V @ 3A	0.7V @ 3A / 0.85V @ 3A — Significantly higher Vf will increase power loss.; DSS310: Vf is nearly double, causing high power loss.
Temperature	-55°C to +125°C	-55°C to +150°C	-	-55°C to +150°C — Wider operating temperature range.

Application & sourcing insights

Questions & answers

Currently, no ideal alternative has been found. The best path is to search for another Trench MOS Schottky diode with similar low forward voltage (Vf ≈ 0.43V), 50V/3A ratings, and a SOD-123FL package. Standard Schottky diodes may fit but will run hotter.