
GOODWORK
Cross-vendor alternative with identical key electrical parameters and package.
SMAJ26CA is a widely-sourced 400W, 26V bidirectional TVS diode in an SMA package for surge protection. Alternatives exist with identical specs or as functional upgrades in different packages.
Low for cross-vendor parts, medium for parametric alternatives.
High if considering parts in different packages like SMB, which require a new PCB layout.
Low, as SMAJ26CA is a multi-sourced component.
Yes, the SMAJ26CA is a standard part number offered by multiple manufacturers, which are considered direct replacements.
Use a cross-vendor SMAJ26CA for a direct, low-risk replacement.
The main risk is selecting an alternative with an incorrect package (e.g., SMB) or a lower electrical rating, such as peak pulse current.

GOODWORK
Cross-vendor alternative with identical key electrical parameters and package.
| Feature / factor | SMAJ26CA | SMAJ26CA | SMAJ28CA | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | DO-214AC (SMA) | SMA (DO-214AC) | DO-214AC (SMA) | SMA (DO-214AC) / DO-214AC (SMA) — Matches target package.; SMAJ28CA: Matches target package. | |
| Voltage | 26.0V | 26.0V | 28.0V | 26.0V / 28.0V — Matches reverse standoff voltage.; SMAJ28CA: Higher standoff voltage may alter protection level. | |
| Power | 400.0W | 400.0W | 400.0W | 400.0W — Matches peak pulse power.; SMAJ28CA: Matches peak pulse power. | |
| Current | 9.5A | 9.5A | 8.8A | 9.5A / 8.8A — Matches peak pulse current.; SMAJ28CA: Lower peak pulse current rating. | |
| Polarity | Bidirectional | Bidirectional | - | Bidirectional — Matches bidirectional polarity. |
The best alternative is another SMAJ26CA from a different manufacturer like Bourns, STMicroelectronics, or Littelfuse, as it offers identical performance and package.