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Best Alternatives to RB521S30T1G

Package: SC-79, SOD-523onsemiDiodes - Rectifiers - SinglePackage: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - DC Reverse (Vr) (Max): 30 VCurrent - Average Rectified (Io): 200mAVoltage - Forward (Vf) (Max) @ If: 500 mV @ 200 mACurrent - Reverse Leakage @ Vr: 30 µA @ 10 V

Finding a substitute for the onsemi RB521S30T1G involves matching its key features: a 30V, 200mA Schottky diode in a compact SOD-523 package, known for its very low forward voltage. Several alternatives exist, but careful review of electrical parameters is essential.

AI replacement insight

Electrical riskmedium

Forward voltage (Vf) mismatch is the main concern. A higher Vf can impact performance.

Package risklow

All suggested alternatives use the same SOD-523 package, ensuring mechanical compatibility.

Sourcing risklow

This is a common diode type with multiple manufacturers, providing good sourcing options.

Can it be replaced directly?

Yes, several direct replacements exist for RB521S30T1G. The most promising is RB521S-30, which shares the same voltage, current, and forward voltage ratings. Other parts are available but may have a slightly higher forward voltage.

Best replacement path

RB521S-30 from manufacturers like Yangzhou Yangjie or Taiwan Semiconductor is the best replacement path, offering identical key specifications in the same package.

Main risk

The primary risk when substituting RB521S30T1G is an increase in forward voltage (Vf), which can reduce circuit efficiency and affect voltage regulation in sensitive applications.

Recommended alternatives

5
RB521S-30 package
RB521S-30

Yangzhou Yangjie Electronic Technology Co.,Ltd

Needs validationlow risk

A strong cross-vendor alternative with matching key electrical parameters and package.

View details

Alternative comparison matrix

Feature / factorRB521S30T1GRB521S-30LRB521S-40T1GRB520S30T1GCompatibility / risk
PackageSOD-523SOD-523--SOD-523 — Package matches.
Voltage30 V30 V--30 V — Voltage rating matches.
Current200 mA200 mA--200 mA — Current rating matches.
Forward Voltage0.5V (max) @ 200mA0.5V @ 200mA--0.6V @ 200mA — Higher forward voltage may reduce efficiency.
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

The best alternative for RB521S30T1G appears to be RB521S-30, as it matches the critical 30V, 200mA, and 0.5V maximum forward voltage specifications in the same SOD-523 package.