Is there a pin-compatible replacement for SMAJ5.0CA?

Yes, parts like SMAJ6.0CAHM2G and P4SMA6.8CA are in the same SMA (DO-214AC) package and are considered pin-compatible. However, their electrical parameters differ, so you must verify them for your circuit.

What risks should I check before replacing SMAJ5.0CA?

The main risks are electrical. Check that the replacement's higher standoff voltage (e.g., 5.8V or 6.0V) is acceptable for your circuit. Also, verify that a lower peak pulse current rating meets your surge protection requirements. For functional alternates, check for package differences.

SMAJ5.0CA Alternatives, Datasheet & Cross Reference | Microdiode Semiconductor (Shenzhen) Co., Ltd.

SMAJ5.0CA is a 400W, 5.0V bidirectional TVS diode in an SMA package for transient voltage protection. Alternatives exist with similar packages but may have different standoff voltages or require PCB changes.

AI replacement insight

Electrical riskmedium

Higher standoff voltage may not protect sensitive 5V circuits. Lower current rating reduces surge capacity.

Package risklow

Multiple candidates share the same SMA (DO-214AC) package, but functional alternates may differ.

Sourcing risklow

This is a common TVS diode type with many cross-vendor options available.

Can it be replaced directly?

No direct 1:1 replacement is identified. Candidates like SMAJ6.0CAHM2G are pin-compatible but have a higher 6.0V standoff voltage, requiring engineering review.

Best replacement path

parametric_relaxed

Main risk

Electrical parameter mismatch, specifically higher standoff voltage and potentially lower peak current handling.

Recommended alternatives

Pin-compatible alternative with a slightly higher 5.8V standoff voltage and lower peak current rating.

View details

Alternative comparison matrix

Feature / factor	SMAJ5.0CA	SMAJ6.0CAHM2G	P4SMA6.8CA	SMBJ6.0CA	Compatibility / risk
Package	DO-214AC (SMA)	DO-214AC, SMA	DO-214AC (SMA)	DO-214AA (SMB)	DO-214AC, SMA / DO-214AC (SMA) / DO-214AA (SMB) — Same package family ensures physical compatibility.; P4SMA6.8CA: Same package family ensures physical compatibility.; SMBJ6.0CA: Larger SMB package is not a drop-in replacement for SMA.
Polarity Or Type	Bidirectional	Bidirectional	Bidirectional	Bidirectional	Bidirectional — Polarity matches the target.; P4SMA6.8CA: Polarity matches the target.; SMBJ6.0CA: Polarity matches the target.
Voltage V	5.0V	6.0V	5.8V	6.0V	6.0V / 5.8V — Higher standoff voltage provides less protection for 5V rails.; P4SMA6.8CA: Higher standoff voltage provides less protection for 5V rails.; SMBJ6.0CA: Higher standoff voltage provides less protection for 5V rails.
Power W	400W	400W	-	600W	400W / 600W — Peak power dissipation matches.; SMBJ6.0CA: Higher power rating offers more robust protection.
Current A	43.5A	~38.8A	38.1A	-	~38.8A / 38.1A — Lower peak pulse current rating reduces surge survivability.; P4SMA6.8CA: Lower peak pulse current rating reduces surge survivability.

Application & sourcing insights

Questions & answers

The best alternative depends on your design constraints. SMAJ6.0CAHM2G is a close parametric match if a 6.0V standoff voltage is acceptable. If you can change the PCB layout, SMBJ6.0CA offers higher power handling.