Surge rating and protection threshold for the 1.5KE10C-B
The 8.55 V reverse standoff voltage defines the normal operating rail it protects; the 15.23 V clamping voltage at 104.8 A peak pulse current sets the maximum transient voltage the downstream circuitry sees during a surge event.
Through-hole package and board integration
Housed in a DO-201AA axial package (DO-27 equivalent) with through-hole mounting. The DO-201 footprint is a standard axial-lead diode layout — the 0.052-inch lead diameter fits a 0.040-inch plated through-hole, and the body length of about 9.5 mm requires clearance on the board edge or in a lead-bending fixture for vertical or horizontal placement. The single bidirectional channel means the part clamps both polarities with one device, simplifying PCB layout for AC-coupled or floating signal lines.
Obsolete lifecycle and sourcing posture
Littelfuse has marked the 1.5KE10C-B as obsolete. No pin-compatible direct replacement from Littelfuse is documented, so a board-level change would be needed to migrate to a current-production TVS diode.