Is there a pin-compatible replacement for 1N5820G?

Yes, several Schottky diodes in the DO-201AD package are pin-compatible. 1N5821RLG is a strong candidate. Always verify the forward voltage (Vf) to ensure it meets your application's efficiency requirements.

What risks should I check before replacing 1N5820G?

The main risk is increased power loss. Check the candidate's forward voltage (Vf) at your operating current. A higher Vf will decrease efficiency and increase heat. Also verify voltage, current, and temperature ratings are sufficient.

1N5820G Alternatives, Datasheet & Cross Reference | onsemi

1N5820G is a popular 20V, 3A Schottky rectifier from onsemi in a DO-201AD package, valued for its low forward voltage and high efficiency. When seeking a replacement, prioritizing a Schottky diode with similar or lower forward voltage is critical.

AI replacement insight

Electrical riskmedium

Forward voltage (Vf) is critical for efficiency. A higher Vf increases power loss.

Package risklow

The DO-201AD axial package is common and easy to source.

Sourcing risklow

Many manufacturers produce similar Schottky diodes, providing a good supply base.

Can it be replaced directly?

Yes, 1N5821RLG is a near-direct replacement for 1N5820G, sharing the same package, current rating, and a very similar forward voltage.

Best replacement path

The 1N582x series from onsemi, such as 1N5821RLG (30V) or 1N5822RLG (40V), are the most direct upgrade paths.

Main risk

Substituting with a diode that has a higher forward voltage (Vf) will reduce circuit efficiency and increase heat dissipation.

Recommended alternatives

Excellent alternative from the same family with a higher voltage rating and very similar parameters.

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Alternative comparison matrix

Feature / factor	1N5820G	1N5821RLG	SR560	MBR360G	Compatibility / risk
Package	DO-201AD (Axial)	DO-201AD (Axial)	DO-201AD	DO-201AD	DO-201AD (Axial) — Package matches.; SR560: Package matches.; MBR360G: Package matches.
Voltage	20V	30V	60V	60V	30V / 60V — Higher voltage rating provides more margin.; SR560: Higher voltage rating.; MBR360G: Higher voltage rating provides more margin.
Current	3A	3A	5A	3A	3A / 5A — Current rating matches.; SR560: Higher current rating.; MBR360G: Current rating matches.
Forward Voltage	0.475V @ 3A	0.500V @ 3A	0.70V @ 5A	0.74V @ 3A	0.500V @ 3A / 0.70V @ 5A / 0.74V @ 3A — Slightly higher Vf, likely acceptable.; SR560: Higher Vf will reduce efficiency.; MBR360G: Higher Vf will reduce efficiency.
Temperature	-65°C to +125°C	-65°C to +125°C	-50°C to +150°C	-65°C to +150°C	-65°C to +125°C / -50°C to +150°C / -65°C to +150°C — Operating temperature range matches.; SR560: Slightly narrower low-end temp range.; MBR360G: Wider operating temperature range.

Application & sourcing insights

Questions & answers

1N5821RLG from the same manufacturer is an excellent alternative, offering a higher voltage rating (30V) with very similar electrical characteristics and the same package.