Littelfuse Inc. 1.5KE series Zener TVS diode, 1.5KE91, 77.8V reverse standoff, 131.25V clamp, 1.5kW peak pulse, DO-201AA axial, Tape & Reel.
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | 1.5KE |
| Mounting | Through Hole |
| Voltage - breakdown | 81.9V |
| Voltage - clamping (Max) @ ipp | 131.25V |
| Voltage - reverse standoff | 77.8V |
| Current - peak pulse (10/1000μs) | 12.2A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -55°C~175°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | General Purpose |
| Case | DO-201AA, DO-27, Axial |
| Unidirectional channels | 1 |
Littelfuse lists the 1.5KE91 as obsolete.
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE91 is a through-hole part — hand-solderable and easy to breadboard or prototype with.
No official pin-compatible successor is listed by Littelfuse. A functional replacement would be another 1.5KE-series TVS with a similar 77.8 V standoff and 1.5 kW rating, but the exact breakdown and clamp voltages must be cross-checked against your design's protection threshold.