The 5.0SMDJ120A/TR13: The 120 V standoff (typ) defines the DC working voltage the diode sees in normal operation; any transient that pushes the line above roughly 133 V triggers breakdown, clamping to a maximum of 193 V at the 26 A peak-pulse current (10/1000 µs). At 5 kW peak pulse, the device absorbs the transient energy and clamps the line before the downstream circuit sees the full surge — the 193 V ceiling is the figure the protected bus must withstand without damage.
DO-214AB SMC package and thermal margin
Junction temperature is rated to 150 °C with a -55 °C lower limit; the wide temperature band covers automotive and industrial ambient extremes without derating the clamping performance.
Tape-and-reel and cut-tape packaging
Ordered as 5.0SMDJ120A/TR13 (Tape & Reel) or the CT suffix variant — confirm the exact ordering code before committing to a BOM line, since the same base part number carries different packaging options. The TR reel suits automated pick-and-place; the CT option is useful for hand-assembled prototypes or low-volume runs.