
BOURNS
A bidirectional TVS in the same SMA package, but with a lower current rating and higher standoff voltage. Requires engineering review.
P4SMA6.8CA is a 400W bidirectional TVS diode in a DO-214AC (SMA) package for surge protection. Finding a replacement requires matching its 5.8V standoff voltage, package, and power ratings.
Candidates have different standoff voltages and peak current ratings that must be verified for the application.
Several alternatives exist in the same DO-214AC (SMA) package.
The SMAJ and P4SMA series are widely available from multiple vendors.
No direct drop-in replacement has been identified. All candidates have parametric differences that require engineering evaluation.
Parametric alternatives in the same SMA package, like SMAJ6.5CA, are the closest path but require review of voltage and current ratings.
The main risk is a mismatch in standoff voltage or peak current rating, which could lead to inadequate circuit protection or false clamping.

BOURNS
A bidirectional TVS in the same SMA package, but with a lower current rating and higher standoff voltage. Requires engineering review.
| Feature / factor | P4SMA6.8CA | SMAJ6.5CA | P4SMA8.2CAHM2G | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | DO-214AC (SMA) | DO-214AC (SMA) | - | DO-214AC, SMA — Package is form-factor compatible. | |
| Polarity Or Type | Bidirectional | Bidirectional | - | Bidirectional — Polarity matches. | |
| Voltage V | 5.8V | 6.5V | - | 7.02V — Significantly higher standoff voltage. | |
| Current A | 38.1A | 35.7A | - | 30.5A — Significantly lower peak current rating. | |
| Power W | 400W | 400W | - | 400W — Power rating matches. |
Alternatives like SMAJ6.5CA exist but may have different standoff voltages or lower current ratings. A full parametric review is required for your application.