Is there a pin-compatible replacement for SMBJ58CA?

Yes, parts like SMBJ51CA and SMBJ64CA share the same SMB (DO-214AA) package and pinout. However, their electrical parameters differ, so they are not drop-in replacements and require review.

What risks should I check before replacing SMBJ58CA?

Key risks are: 1) Polarity mismatch (must be bidirectional). 2) Standoff voltage change, which affects the protection level. 3) Lower peak pulse current (Ipp) rating, which can lead to failure under surge.

SMBJ58CA Alternatives, Datasheet & Cross Reference | BOURNS

SMBJ58CA is a popular 58V, 600W bidirectional TVS diode in an SMB package. Finding a replacement requires careful matching of standoff voltage, polarity, and peak current rating.

AI replacement insight

Electrical riskhigh

Standoff voltage and peak current differences require careful circuit analysis.

Package risklow

All viable candidates use the same industry-standard SMB package.

Can it be replaced directly?

No direct drop-in replacement was found in this list. SMBJ51CA is the closest candidate but requires engineering review due to its lower standoff voltage.

Best replacement path

SMBJ51CA may be a suitable option if the circuit's operating voltage is safely below 51V, as it offers higher surge capability. Otherwise, a part with identical ratings from another manufacturer is recommended.

Main risk

The main risk is changing the protection voltage. A lower voltage (like SMBJ51CA) can cause false triggering, while a higher voltage (like SMBJ64CA) can damage the protected circuit.

Recommended alternatives

A potential alternative with higher current handling but lower standoff voltage; requires design review.

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Alternative comparison matrix

Feature / factor	SMBJ58CA	SMBJ51CA	SMBJ64CA	Compatibility / risk
Package	DO-214AA (SMB)	DO-214AA (SMB)	DO-214AA (SMB)	DO-214AA (SMB) — Same package and pin count.; SMBJ64CA: Same package and pin count.
Polarity Or Type	Bidirectional	Bidirectional	Bidirectional	Bidirectional — Polarity matches.; SMBJ64CA: Polarity matches.
Voltage V	58.0V	51.0V	64.0V	51.0V / 64.0V — Lower standoff voltage may cause clamping during normal operation.; SMBJ64CA: Higher standoff voltage reduces circuit protection.
Current A	6.41A	7.3A	5.9A	7.3A / 5.9A — Higher peak pulse current offers better surge survivability.; SMBJ64CA: Lower peak pulse current rating increases failure risk.
Power W	600.0W	600.0W	600.0W	600.0W — Power rating matches.; SMBJ64CA: Power rating matches.

Application & sourcing insights

Questions & answers

SMBJ51CA is a potential alternative with higher surge current but a lower 51V standoff voltage. This requires verifying your circuit's operating voltage is below 51V to prevent issues.