Is there a pin-compatible replacement for BSD3A311V?

No pin-compatible (pin-to-pin) replacement for the BSD3A311V in its SOD-323 package has been confirmed. All reviewed candidates with similar electrical properties are in different, larger packages.

What risks should I check before replacing BSD3A311V?

Key risks include: 1) Package mismatch, requiring a new PCB layout. 2) Polarity, ensure the replacement is also unidirectional. 3) Working voltage (VRWM), a higher voltage may not protect the circuit adequately. 4) Clamping voltage and breakdown voltage, which determine the actual protection level.

BSD3A311V Alternatives, Datasheet & Cross Reference | BORN

Finding a replacement for the BSD3A311V TVS diode requires careful review of package and electrical parameters. While no direct drop-in replacements are identified, functional alternatives exist that require board redesign.

AI replacement insight

Package riskhigh

No alternatives match the SOD-323 package, requiring a mandatory board redesign.

Electrical riskmedium

Alternatives have higher working voltage (36V vs 30V), which may not provide sufficient protection.

Firmware risklow

TVS diodes are passive components and do not involve firmware.

Can it be replaced directly?

No direct, drop-in replacement for BSD3A311V is available among the candidates. All options require significant engineering review.

Best replacement path

Use a functional alternative like SMCJ36A or SMBJ36A, but plan for a board respin and verify the higher working voltage is acceptable.

Main risk

The primary risk is the lack of a form-fit compatible part, forcing a PCB redesign. A secondary risk is the higher working voltage of alternatives.

Recommended alternatives

A functional alternative with higher power ratings but in a different package (SMB) that requires board and electrical review.

View details

Alternative comparison matrix

Feature / factor	BSD3A311V	SMBJ36A	SMCJ36A	Compatibility / risk
Package	SOD-323	DO-214AA (SMB)	DO-214AB (SMC)	DO-214AA (SMB) / DO-214AB (SMC) — Requires board redesign.; SMCJ36A: Requires board redesign.
Polarity	Unidirectional	Unidirectional	Unidirectional	Unidirectional — matched; SMCJ36A: matched
Voltage	30V	36V	36V	36V — Higher voltage offers less protection; must be verified.; SMCJ36A: Higher voltage offers less protection; must be verified.
Power	220W	600W	1500W	600W / 1500W — Higher power handling is a safe upgrade.; SMCJ36A: Higher power handling is a safe upgrade.
Current	5.0A	10.4A	25.8A	10.4A / 25.8A — Higher peak current capability.; SMCJ36A: Higher peak current capability.

Application & sourcing insights

Questions & answers

Currently, no direct drop-in replacement has been identified. Parts like SMCJ36A or SMBJ36A are functional alternatives with higher power ratings, but they come in different packages (SMC/SMB) and require a board redesign and electrical review due to a higher working voltage.