Clamp voltage and breakdown window
The 1.5KE400CA-TP: Minimum breakdown voltage is 380 V, so the device starts conducting avalanche current at that threshold. The 548 V maximum clamp at the rated Ipp means a 342 V bus sees a transient held under 550 V — enough margin for a 600 V-rated MOSFET or IGBT on the same rail. The DO-201AE axial-lead package (through-hole) handles the 1500 W pulse without exceeding the thermal limit, provided the lead length and board copper carry the heat away between events.
Active production — no cross-reference on record
Micro Commercial Co lists the 1.5KE400CA-TP as Active. No official successor or pin-compatible cross-reference is published — the part is the current production choice for this voltage and power class in a bidirectional Zener TVS. No stock-holding claim — quoted to order.