Is there a pin-compatible replacement for SR3100?

Yes, several Schottky diodes like SR5200 and SR5100 are available in the same 2-pin DO-201AD axial package and are considered pin-compatible for form and fit.

What risks should I check before replacing SR3100?

The main risk is substituting a non-Schottky diode, which will increase forward voltage (Vf) and power loss. Always verify the candidate is a Schottky diode and check its Vf and reverse leakage (Ir) ratings.

SR3100 Alternatives, Datasheet & Cross Reference | MDD(Microdiode Semiconductor)

SR3100 is a 3A, 100V Schottky diode in a DO-201AD package, valued for its low forward voltage. When seeking alternatives, prioritize other Schottky diodes with similar or better voltage and current ratings.

AI replacement insight

Electrical riskhigh

Substituting with a non-Schottky diode type will cause higher Vf and power loss, potentially leading to overheating.

Package risklow

The DO-201AD package is common, and many alternatives share the same form factor.

Can it be replaced directly?

SR5100 is a strong functional match with the same voltage and higher current. SR5200 is a recommended upgrade for more robust designs.

Best replacement path

Upgrade to SR5200 for higher voltage (200V) and current (5A) headroom in the same package.

Main risk

Using a non-Schottky diode (e.g., Fast Recovery type) will significantly increase power dissipation due to higher forward voltage.

Recommended alternatives

A strong upgrade with higher voltage and current ratings in the same package.

View details

Alternative comparison matrix

Feature / factor	SR3100	SR5200	SR5100	Compatibility / risk
Package	DO-201AD	DO-201AD, Axial	DO-201AD	DO-201AD, Axial — Package matches, ensuring form and fit.; SR5100: Package matches, ensuring form and fit.
Diode Type	Schottky	Schottky	Schottky	Schottky — Functional type matches target.; SR5100: Functional type matches target.
Voltage	100V	200V	100V	200V / 100V — Higher voltage rating provides more design margin.; SR5100: Voltage rating matches target.
Current	3.0A	5.0A	5.0A	5.0A — Higher current rating provides more design margin.; SR5100: Higher current rating provides more design margin.
Forward Voltage	0.85V @ 3A	~0.92V @ 5A	-	~0.92V @ 5A — Slightly higher Vf, may increase power loss.

Application & sourcing insights

Questions & answers

SR5200 is a strong alternative, offering higher voltage (200V) and current (5A) ratings. For a closer match, SR5100 provides the same 100V rating with a higher 5A current.