What the ratings mean for the protection window
The SMCJ14CA-13: When a surge exceeds the breakdown voltage (15.6 V min), the diode avalanches and clamps the line to 23.2 V maximum while shunting 64.7 A of peak pulse current — this clamping voltage is the voltage the downstream IC must survive for the duration of the transient.
Housed in the DO-214AB (SMC) surface-mount package, the part uses a standard footprint with a large copper pad on the cathode side for heat sinking — the 1500 W pulse energy dissipates through the pad into the PCB copper, so the board layout directly affects the derating margin. The part is supplied in Cut Tape (CT) packaging, suitable for prototype builds or small-batch production; reel quantities are available through the standard ordering process.