Bidirectional 170 V rail clamp — 189 V breakdown floor
Its minimum breakdown voltage of 189 V ensures the device stays off during normal line ripple while triggering before the downstream silicon sees damaging overvoltage. The clamping voltage at 2 A peak pulse current is 304 V max.
DO-214AA SMB — surface-mount footprint for 170 V protection
Housed in the DO-214AA (SMB) package, the SMBJ170CE3/TR13 mounts on standard surface-mount pads. The base product number SMBJ170 covers the unidirectional variant; the 'C' suffix in this order code confirms the bidirectional channel.
Microchip lists the SMBJ170CE3/TR13 as Active.