1.5 kW bidirectional TVS for 128 V rails
The 1.5KE150CA_R2_00001: It clamps transients on a 128 V DC bus — the reverse standoff voltage — and starts conducting at 143 V minimum breakdown, limiting the surge to 207 V maximum at 7.2 A peak pulse current. The bidirectional configuration means a single device protects both positive and negative transients, simplifying BOM count on unipolar and bipolar rails alike.
Clamping performance and thermal envelope
With a 207 V clamping ceiling at 7.2 A, this TVS absorbs surges that would otherwise exceed the breakdown rating of downstream semiconductors on a 128 V nominal rail. The 1500 W peak pulse rating assumes the standard 10/1000 µs double-exponential waveform — derate for shorter pulse widths or higher ambient temperatures per the manufacturer's pulse derating curve. Operating junction temperature spans -65°C to 175°C, covering cold-start conditions in outdoor telecom cabinets and the hot interior of sealed power supplies. The DO-201AE axial-lead package (through-hole) conducts heat through the lead wires into the PCB copper or terminal block — the thermal path is set by the lead length and pad area, not the body alone.
Obsolete — sourcing through independent channels
Panjit lists the 1.5KE150CA_R2_00001 as obsolete — the manufacturer no longer produces it. Available through independent surplus and broker channels. Quantities are lot-specific; each lot is inspected for authenticity and lead-free compliance before shipment.