Is there a pin-compatible replacement for BAS516?

While several diodes exist in the same SOD-523 package, none of the reviewed candidates are electrically compatible for a drop-in replacement. A pin-compatible replacement must also match key electrical ratings.

What risks should I check before replacing BAS516?

Key risks include insufficient voltage rating (must be ≥100V), inadequate current handling (≥250mA), and slower switching speed (trr should be ~4ns). Using a part that fails these checks can cause circuit failure.

BAS516 Alternatives, Datasheet & Cross Reference | FUXINSEMI

FUXINSEMI's BAS516 is a 100V, 250mA fast switching diode in a compact SOD-523 package. It is designed for high-speed applications requiring a reverse recovery time of just 4ns.

AI replacement insight

Electrical riskhigh

Most candidates have lower voltage/current ratings or are significantly slower.

Package risklow

All reviewed candidates share the same SOD-523 package.

Can it be replaced directly?

No direct drop-in replacements for BAS516 have been identified. However, some high-risk alternatives exist with different performance or lower electrical ratings that may work only after careful engineering review.

Best replacement path

Engineers should search for a fast switching diode in a SOD-523 package with Vr ≥ 100V, If ≥ 250mA, and trr ≤ 4ns.

Main risk

The primary risk in replacing the BAS516 is using a part with lower voltage/current ratings or slower switching speed, which can lead to device failure or circuit malfunction.

Recommended alternatives

A form-fit match with higher voltage, but its much slower switching speed makes it a high-risk downgrade for fast applications.

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Alternative comparison matrix

Feature / factor	BAS516	BAS521	1N4148WT	Compatibility / risk
Package	SOD-523	SOD-523	SOD-523	SOD-523 — Package matches target.; 1N4148WT: Package matches target.
Voltage	100V	300V	75V	300V / 75V — Higher voltage rating is a safe upgrade.; 1N4148WT: Lower voltage rating poses high risk of failure.
Current	250mA	250mA	150mA	250mA / 150mA — Current rating matches target.; 1N4148WT: Lower current rating poses high risk of failure.
Application	4ns	50ns	4ns	50ns / 4ns — Candidate is >10x slower, unsuitable for high-speed switching.; 1N4148WT: Switching speed matches target's requirement.

Application & sourcing insights

Questions & answers

No direct replacement is available. BAS521 is an option with higher voltage but is much slower. 1N4148WT matches the speed but has lower voltage/current ratings. Both are high-risk and require careful circuit analysis.