Is there a pin-compatible replacement for 1N5817W?

Yes, the 1N5819W and B5819W are pin-compatible replacements in the same SOD-123 package. They offer a higher voltage rating, which is a safe upgrade for most designs.

What risks should I check before replacing 1N5817W?

The main risk is a potential increase in forward voltage (Vf), which could slightly reduce power efficiency. Also, if considering a package variant like SOD-123FL, you must verify it fits your PCB footprint.

1N5817W Alternatives, Datasheet & Cross Reference | TWGMC

Find reliable substitutes for the 1N5817W, a 20V 1A Schottky diode in a SOD-123 package. This guide provides verified alternatives, including the 1N5819W, offering a direct upgrade path for your design.

AI replacement insight

Electrical risklow

Most alternatives offer higher voltage/current ratings. The primary check is forward voltage (Vf).

Package risklow

Most alternatives use the identical SOD-123 package. Variants like SOD-123FL require a simple footprint check.

Sourcing risklow

The 1N581x series and its crosses are widely available from multiple manufacturers.

Can it be replaced directly?

Yes, the 1N5819W is a direct, pin-compatible replacement for the 1N5817W, providing a higher voltage tolerance as a safe upgrade.

Best replacement path

Upgrade to the 1N5819W for a higher voltage rating (40V) within the same product family, ensuring high compatibility.

Main risk

A slight increase in forward voltage (Vf) with some alternatives could minimally impact power efficiency in highly sensitive circuits.

Recommended alternatives

A direct upgrade from the same product family with a higher voltage rating (40V) in an identical SOD-123 package.

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Alternative comparison matrix

Feature / factor	1N5817W	1N5819W	B5819W	DSK24	Compatibility / risk
Diode Type	Schottky	Schottky	-	-	Schottky — Diode type matches the target.
Package	SOD-123	SOD-123	-	-	SOD-123FL — Flatter package variant; verify layout compatibility.
Voltage	20V	40V	-	-	40V — Higher voltage rating.
Current	1A	1A	-	-	1A — Current rating is identical.
Forward Voltage	~0.45V @ 1A	~0.6V @ 1A	-	-	~0.6V @ 1A — Slightly higher forward voltage may impact efficiency.

Application & sourcing insights

Questions & answers

The 1N5819W is the best alternative. It offers the same 1A current and SOD-123 package with a higher 40V rating, making it a direct upgrade from the same product family.