Is there a pin-compatible replacement for 1N5822?

Yes, several Schottky rectifiers like SR3100 and SR5100 use the same DO-201AD package and are pin-compatible for physical layout. However, you must verify key electrical parameters like forward voltage (Vf) before using them as a drop-in replacement.

What risks should I check before replacing 1N5822?

When replacing the 1N5822, the main risk is increased power dissipation. A substitute with a higher forward voltage (Vf) will run hotter and be less efficient. Always check that the reverse voltage and current ratings are equal to or greater than the original part.

1N5822 Alternatives, Datasheet & Cross Reference | MDD(Microdiode Semiconductor)

1N5822 is a popular 40V, 3A Schottky rectifier in a DO-201AD package, valued for its low forward voltage drop. Finding a suitable replacement requires careful matching of this key efficiency parameter to avoid thermal issues.

AI replacement insight

Electrical riskmedium

Higher forward voltage in candidates will increase power loss and component temperature.

Package risklow

Multiple candidates share the same DO-201AD package, ensuring physical compatibility.

Can it be replaced directly?

No direct drop-in replacement was found. Potential alternatives like SR3100 have a significantly higher forward voltage, which requires careful engineering review and thermal validation.

Best replacement path

Search for a Schottky rectifier in a DO-201AD package with Vr ≥ 40V, If ≥ 3A, and a forward voltage (Vf) below 0.6V to maintain efficiency.

Main risk

The primary risk is increased power dissipation and heat caused by a substitute with a higher forward voltage (Vf), which can reduce system efficiency and reliability.

Recommended alternatives

A Schottky rectifier with the same package and current rating, but a higher forward voltage requires review.

View details

Alternative comparison matrix

Feature / factor	1N5822	SR3100	SR5100	Compatibility / risk
Package	DO-201AD	DO-201AD	DO-201AD	DO-201AD — Package is physically compatible.; SR5100: Package is physically compatible.
Voltage	40 V	100 V	100 V	100 V — Higher reverse voltage provides more design margin.; SR5100: Higher reverse voltage provides more design margin.
Current	3 A	3 A	5 A	3 A / 5 A — Forward current rating is identical.; SR5100: Higher forward current rating offers an upgrade.
Forward Voltage	0.525 V @ 3 A	0.85 V	0.85 V @ 5A	0.85 V / 0.85 V @ 5A — Significantly higher Vf will increase power loss and heat.; SR5100: Significantly higher Vf will increase power loss and heat.
Temperature	-65°C to +125°C	-50°C to +150°C	-50°C to +150°C	-50°C to +150°C — Reduced operating range at low temperatures.; SR5100: Reduced operating range at low temperatures.

Application & sourcing insights

Questions & answers

The best alternative to a 1N5822 is another Schottky rectifier with a reverse voltage of at least 40V, a current rating of 3A or more, and a forward voltage (Vf) as close to 0.525V as possible. SR3100 is a potential candidate but has a higher Vf that must be evaluated.