1500 W peak pulse — what that means on the bench
The 1.5KE43CA-B: The 36.8 V reverse standoff voltage means it starts clamping above that rail — if your 36 V bus sees a transient, the diode shunts it at 40.9 V breakdown minimum and hard-clamps at 59.3 V max, passing up to 25.3 A of surge current before the part self-destructs. Bidirectional — one channel handles both polarities, so a single part protects a floating or AC-coupled line without needing two diodes back-to-back.
Obsolete — sourcing reality for this TVS
Diodes Incorporated lists this part as Obsolete. Available through independent surplus and broker channels.
Package and mounting — DO-201 axial lead
Through-hole axial package compatible with DO-201AA and DO-27 footprints — the supplier device package is DO-201. The 0.042-inch lead diameter fits standard 0.040-inch PCB holes; the body is 9.1 mm long and 5.3 mm diameter, so it occupies about the same board area as a 1 W resistor.