Obsolete — sourcing through independent channels
Diodes Incorporated has marked the 1.5KE8V2A-B as obsolete. For BOM lines that still carry this part number, supply runs through independent surplus and broker channels.
1500W Zener TVS — what the ratings mean for the protection decision
That clamping voltage is what the downstream circuitry must survive — a 12V-tolerant input stage has headroom; a 5V logic rail needs additional series resistance or a secondary clamp. The wide band also means the leakage current at the standoff voltage shifts with temperature; at 175°C the standby draw is higher than the 25°C datasheet typical.
DO-201 axial — package and board-fit note
The 1.5KE8V2A-B comes in a DO-201AA / DO-27 axial-lead package, through-hole mount, supplied in bulk. The DO-201 body is larger than the common DO-41 or SMA packages — the lead diameter and body length take up more board area and require a drilled hole with a larger pad diameter for thermal and mechanical support. Axial-lead TVS diodes are often specified in point-to-point wiring or terminal-block layouts where the leads are bent and soldered into a PCB or turret terminal. The bulk packaging means no reel or tape — each unit is handled individually, which is typical for through-hole assembly or rework stations.
Signal-line protection — no power line rating
The 1.5KE8V2A-B carries a 'Power Line Protection: No' flag, meaning it is not rated for direct AC mains or high-energy power-line transients. Its intended use is on DC signal, data, or low-voltage power buses where the energy in a 10/1000µs surge is within the 1500W peak pulse envelope. With a single unidirectional channel, this TVS protects one line per device. Bidirectional or multi-channel configurations require a different part — the 1.5KE series includes bidirectional variants, but this specific order code is unidirectional.