Clamping Voltage and Pulse Current: The Fit Decision
The 1.5KE68AE3/TR13: For a 48V bus or a 60V telecom line, this clamp keeps the transient below the downstream component's absolute maximum rating — provided the PCB trace inductance and the TVS's own response time are accounted for in the layout. The 58.1V reverse standoff (working voltage) means the diode does not conduct at normal line levels up to that DC voltage. The 64.6V minimum breakdown gives a narrow guard band: a 60V rail with 5% tolerance stays below breakdown, but a 63V rail at high line may trigger leakage. Operating temperature spans -65°C to 150°C, covering industrial and military thermal extremes.
Obsolete — Sourced Through Surplus Channels
Microsemi has marked the 1.5KE68AE3/TR13 as Obsolete. No official successor or second-source part number is listed on the lifecycle record. The part is available through independent surplus and broker channels; each lot is date-code verified and quoted against the BOM quantity at RFQ.