1500 W bidirectional transient suppressor
The 1.5KE91C: The bidirectional configuration means a single device clamps both polarities, saving board space compared to back-to-back unidirectional diodes.
DO-201 axial package and temperature range
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE91C is a through-hole part suited for point-to-point wiring or PCB mounting with lead bending. The junction operates from -55°C to 175°C, covering industrial and automotive under-hood ambient conditions without derating at the upper end. Power line protection is not supported — the device is intended for signal and low-power rail clamping, not for direct AC mains or high-energy surge paths that exceed the 1500 W rating.
Obsolete — sourcing through independent channels
Littelfuse has marked the 1.5KE91C as obsolete. This part is available through independent surplus and broker channels, with quantities and pricing confirmed at RFQ.