1500W bidirectional TVS — 33.3V standoff, 53.9V clamp
The 1.5KE39CA-B: The 33.3V reverse standoff voltage means the device does not conduct at normal rail levels up to that point — above that, breakdown begins at 37.1V minimum, clamping transients to 53.9V maximum at the rated 28A peak pulse current. Single bidirectional channel in a DO-201AA (DO-27) axial-lead through-hole package.
Board-fit and application context
Through-hole axial package — mounts by bending the leads to the PCB hole pattern or inserting into a terminal block. No power line protection feature; intended for signal or low-voltage DC bus clamping where bidirectional suppression is needed.