TVS diode parametrics for the 13.6 V rail
The 1.5KE16CA-B: Its reverse standoff voltage of 13.6 V means it stays transparent below the rail voltage and only begins conducting when the line exceeds that threshold.
Package and board-fit for the DO-201 axial lead
Supplied in a DO-201AA / DO-27 axial-lead package (supplier device package DO-201), the part is through-hole mounted. The axial leads require a 0.052-inch (1.3 mm) diameter hole on a 0.4-inch lead spacing — a standard layout for legacy power-supply and telecom protection boards. The wide temperature margin means the clamping voltage and leakage current remain within datasheet limits across the full range, not just at 25°C.
Lifecycle status and sourcing for sustainment programs
Diodes Incorporated lists the 1.5KE16CA-B as Obsolete. The base product number is 1.5KE16. The -B suffix indicates bulk packaging. When ordering, confirm the BOM line calls for the bidirectional (CA suffix) variant — the unidirectional version shares the same base number but has different clamping characteristics.