Is there a pin-compatible replacement for BAS321,115?

No direct pin-compatible replacement has been identified in this analysis. All candidates reviewed require a PCB layout change due to different package footprints (e.g., SMA instead of SOD323).

What risks should I check before replacing BAS321,115?

Key risks include package mismatch requiring board redesign, and differences in reverse recovery time (trr) which can affect switching efficiency and EMI. Also verify forward voltage drop (Vf) at your operating current.

BAS321,115 Alternatives, Datasheet & Cross Reference | Nexperia USA Inc.

Finding a substitute for the BAS321,115 high-speed diode requires matching its 200V rating, 250mA current, fast 50ns recovery time, and compact SOD323 package. Alternatives exist but often differ in package size.

AI replacement insight

Package riskhigh

All candidates are in much larger packages (SMA vs SOD323), requiring a new PCB layout.

Electrical riskmedium

Some candidates have slower recovery times (trr), which could impact switching performance.

Can it be replaced directly?

No, a direct drop-in replacement for the BAS321,115 was not found. All reviewed candidates have different physical packages.

Best replacement path

For electrical function, US2D is a strong candidate if a PCB redesign is possible. For physical fit, a new search for SOD323 packaged diodes is required.

Main risk

The primary risk is the significant package mismatch, which prevents a drop-in replacement and necessitates a PCB redesign.

Recommended alternatives

Functionally similar diode with higher current rating but in a different package requiring board redesign.

View details

Alternative comparison matrix

Feature / factor	BAS321,115	US2D	US1J	US1M	Compatibility / risk
Package	SOD323 (SC-76)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA) — Not a drop-in replacement; requires PCB redesign.; US1J: Not a drop-in replacement; requires PCB redesign.; US1M: Not a drop-in replacement; requires PCB redesign.
Voltage	200.0V	200.0V	600.0V	1000.0V	200.0V / 600.0V / 1000.0V — Reverse voltage matches the target's requirement.; US1J: Significantly higher voltage rating.; US1M: Significantly higher voltage rating.
Current	0.25A	2.0A	1.0A	1.0A	2.0A / 1.0A — Significantly higher current handling capability.; US1J: Higher current handling capability.; US1M: Higher current handling capability.
Recovery Time	50ns	50ns	75ns	75ns	50ns / 75ns — Reverse recovery time matches the target.; US1J: Slightly slower recovery time, may impact high-frequency switching.; US1M: Slightly slower recovery time, may impact high-frequency switching.

Application & sourcing insights

Questions & answers

The best alternative depends on application constraints. US2D offers similar electrical performance but in a larger SMA package. If the package must match, a new search focusing on SOD323 fast-recovery diodes is needed.