1.5kW bidirectional TVS for 40V automotive rails
The 1.5KE47CAHE3/51: It clamps transients at 64.8V maximum while holding a 40.2V reverse standoff voltage, making it a fit for 36V nominal or 48V automotive bus protection where the steady-state rail sits below the standoff threshold.
Clamping and breakdown window
This window means a 48V nominal bus sees the diode start conducting around 45V and hold the transient below 65V — within the typical 75V absolute-max rating of downstream DC-DC converters and load switches in automotive ECUs. The single bidirectional channel handles positive and negative transients symmetrically, eliminating the need for two back-to-back unidirectional devices on a bipolar rail.
Package and board integration
Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE47CAHE3/51 is a through-hole device. The axial body and 0.042-inch diameter leads suit point-to-point wiring, terminal block termination, or PCB through-hole mounting where the lead bend radius is controlled to avoid stress cracking the glass passivation. The bulk packaging (51 pieces per bag) is typical for low-volume production runs, repair stock, or engineering samples. No reel or tape-and-reel option is listed — the part ships loose in anti-static tubes or bags per the bulk code.