Obsolete — sourcing through independent channels
Panjit lists the 1.5KE91A_R2_00001 as Obsolete. No official successor or second-source is recorded for this order code. For sustainment or repair programs that still need this exact TVS, it is available through independent surplus and broker channels. Availability and pricing are confirmed at RFQ against the BOM quantity.
Key ratings for the BOM line
This means it clamps transients on a nominal 77.8 V rail — a 12 V lead-acid battery in float charge at 13.8 V is well below the standoff, but a 48 V telecom bus at 54 V nominal sits within the margin. Unidirectional, single-channel Zener TVS in a DO-201AE axial through-hole package. The junction temperature range spans -65°C to 175°C, covering most industrial and automotive under-hood environments.