
BOURNS
Functional alternative with matching voltage but in a larger package requiring board layout changes.
PESD5V0S1UB,115 is a compact unidirectional TVS diode for 5V lines. Finding a direct drop-in replacement requires matching the small SOD523 package and key electrical characteristics.
Target SOD523 is much smaller than alternatives in SMB packages.
Candidates with matching 5V standoff voltage are available.
No direct, drop-in replacement was identified. While functional alternatives with matching voltage exist, they require a PCB redesign due to package differences.
Search for a 5V unidirectional TVS in a SOD523 package. If unavailable, consider functional alternatives like SMBJ5.0A, but plan for a board respin.
Package mismatch. The target's SOD523 package is significantly smaller than most electrically similar TVS diodes, making a drop-in replacement difficult.

BOURNS
Functional alternative with matching voltage but in a larger package requiring board layout changes.
| Feature / factor | PESD5V0S1UB,115 | SMBJ5.0A | SMBJ5.0A-13-F | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD523 | SMB (DO-214AA) | SMB | SMB (DO-214AA) — Not a drop-in replacement. SMB is much larger than SOD523.; SMBJ5.0A-13-F: Not a drop-in replacement. SMB is much larger than SOD523. | |
| Voltage | 5.0V | 5.0V | 5.0V | 5.0V — Reverse standoff voltage matches.; SMBJ5.0A-13-F: Reverse standoff voltage matches. | |
| Current | 15.0A | 65.3A | 65.2A | 65.3A / 65.2A — Higher peak pulse current capability.; SMBJ5.0A-13-F: Higher peak pulse current capability. | |
| Power | Not specified | 600W | 600W | 600W — Higher power dissipation capability.; SMBJ5.0A-13-F: Higher power dissipation capability. |
The best alternatives, like SMBJ5.0A, offer matching 5V protection but come in a larger package, requiring a PCB redesign. For a drop-in replacement, a part in a SOD523 package with similar electricals is needed.