The SMBJ22CE3/TR13: For a BOM line protecting a 22V rail, this removes the sourcing headache of last-time-buy or forced redesign.
600W peak pulse — what the rating means for your rail
The 22V reverse standoff voltage means the diode stays out of the circuit during normal operation, only conducting when the line exceeds 24.4V breakdown. This margin is tight enough for a regulated 22V supply but leaves headroom below the absolute maximum of downstream components.
Bidirectional Zener — one device for AC or floating lines
The Zener-type construction gives a sharp breakdown knee, so the clamping voltage stays predictable across temperature.
DO-214AA (SMB) — surface-mount with a thermal pad story
Housed in the DO-214AA (SMB) package, the device is rated for junction temperatures from -65°C to 150°C. The SMB footprint is larger than the smaller SMA, which helps spread the heat from repetitive surges. Mounting is surface-mount, and the Tape & Reel delivery suits automated pick-and-place for volume assembly.