The 1.5SMCJ43CA_R1_00001: The 69.4 V maximum clamping voltage is the voltage the downstream circuit sees during a 21.6 A peak pulse event; the standoff voltage of 43 V typ means the part sits idle on a 43 V rail with minimal leakage until the transient pushes it into breakdown. The minimum breakdown of 47.8 V sets the turn-on threshold — the device remains off during normal 43 V operation and activates only when a transient exceeds that level, protecting sensitive downstream circuitry from overvoltage events.
DO-214AB SMC package and industrial temperature range
The DO-214AB (SMC) package is the standard surface-mount footprint for 1.5–3 kW TVS diodes, and the anode/cathode orientation on the bidirectional device must be confirmed against the layout — the polarity matters on a single-direction TVS Zener, and this part is a bidirectional clamp. Available in Tape & Reel and Cut Tape packaging — the which exact ordering code matters for automated placement, since the tape-and-reel variant is the standard reel wound in the factory and cut tape is typically hand-assembled or used for prototypes.