The 1.5KE180C-E3/54: The 162V minimum breakdown voltage (Vbr) guarantees the avalanche triggers before the protected circuit's own voltage rating is exceeded. Clamping at 258V maximum at the 5.8A peak pulse current means the downstream silicon sees no more than 258V across the transient. The 1500W peak pulse rating (10/1000µs) defines the energy the device absorbs in a single surge — a longer or higher-energy pulse requires a higher-rated part. The operating junction temperature range spans -55°C to +175°C, covering outdoor telecom cabinets and industrial enclosures where ambient heat plus self-heating from repetitive surges must stay within the die's thermal limit.
DO-201AA axial package — board-fit note
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE180C-/54 is a through-hole device. The lead spacing and body diameter match the standard 1.5KE footprint — a drop-in replacement for any 1.5KE-series bidirectional TVS in the same package. The bidirectional construction (single die, two back-to-back junctions) means polarity is irrelevant — install it either way across the rail.