Clamping performance at 1500 W
The SMCJ48A-13: The 53.3 V minimum breakdown voltage means the device starts conducting before the rail exceeds the protected circuit's absolute maximum rating, buying margin for the downstream silicon. The -55°C to 150°C junction temperature range covers both cold-start and hot-soak conditions in outdoor or under-hood environments. The DO-214AB (SMC) body handles the 1500 W pulse without package cracking, provided the PCB copper area meets the thermal impedance the datasheet assumes.