End-of-life sourcing for a 1.5 kW automotive-grade clamp
The 1.5KE20CHE3/73: It clamps transients at 29.1 V maximum, with a 16.2 V reverse standoff voltage and a minimum breakdown of 18 V.
Clamping envelope and pulse capability
The single bidirectional channel clamps both polarities symmetrically, so a single device protects a signal line against positive and negative transients without needing series diodes.
Package and board integration
Housed in a DO-201AA (DO-27) axial-lead package, it mounts through-hole — the lead bend and body length match standard TVS footprints used across the 1.5KE family, so a board already laid out for a 1.5KE20A or 1.5KE20CA accepts this part without layout changes. The 1.5KE package suffix is the standard DO-201AA outline; the body diameter and lead spacing are consistent across the entire 1.5KE series, simplifying BOM consolidation.
Sourcing an obsolete automotive-grade TVS
For sustainment programs (medical, defence, or long-life automotive ECUs) that already qualify this part, supply runs through independent distribution.