Surge protection for 70 V telecom rails
The 1.5SMB82A: With a 70.1 V reverse standoff voltage, it sits across a 48 V or 60 V telecom bus and stays transparent during normal operation, only conducting when the line sees a transient that exceeds the 77.9 V minimum breakdown threshold. Clamping is specified at 113 V maximum at the 13.5 A peak pulse current — this is the voltage the protected IC sees during the surge, so the downstream device must have an absolute-max rating above 113 V for the protection to hold.
Package and board integration
Housed in the DO-214AA (SMB) package, the 1.5SMB82A is a surface-mount device with a standard JEDEC footprint — the same pad layout used for SMBJ-series parts, so no board respin if swapping between equivalent TVS diodes from different lines. Supplied on Tape & Reel, consistent with automated pick-and-place assembly for high-volume telecom line cards.