26V rail clamp, 600W pulse — the field-swap call
The SMBJ26A-13: Rated for 600 W peak pulse power, this part handles the energy from a typical surge on a 24 VDC supply line in industrial control or telecom equipment. The 26 V reverse standoff means the diode stays out of the circuit during normal operation and only conducts when the line voltage exceeds the breakdown threshold of 28.9 V minimum.
DO-214AA SMB — board-fit and rework
Housed in the DO-214AA (SMB) surface-mount package, the SMBJ26A-13 is a standard footprint for TVS diodes. The package is large enough to hand-solder with a fine-tip iron if you are doing a field repair — no hot-air station required, just steady hands and a solder wick. The part is rated for general-purpose applications, so it fits into power supplies, I/O lines, and DC bus protection without special derating.