1.5kW peak pulse — what the clamping spec means for 48V rail protection
The 1.5SMCJ48CA-AQ clamps at 77.4V maximum under a 19.4A peak pulse event (10/1000 µs waveform) — that ceiling is what the downstream circuit must withstand. Any downstream component with an absolute maximum below 77.4V needs additional headroom or a lower-standoff TVS ahead of it. The CA suffix marks it bidirectional, so it clamps both polarities without a second device. Rated for automotive junction temperatures from -50°C to 150°C — the upper end aligns with under-hood ambient profiles, though the evidence does not list an explicit AEC-Q qualification grade.
DO-214AB SMC — the standard automotive TVS footprint
Surface-mount DO-214AB (SMC) is the go-to package for 1.5kW TVS diodes — the wide metal pads on the cathode tab carry the transient current to the board plane. Solder joint geometry matters: a void under the die attach degrades thermal transfer from junction to board, which raises the clamping voltage under pulse stress. Strip packaging is the standard taped-and-reeled format for SMC bodied parts; confirm the reel orientation matches your pick-and-place head before committing to a new assembly process.
Active production — sourcing posture and lifecycle read
Listed as Active by Diotec Semiconductor.