Transient protection for 24 VDC rails
The 1.5KE30CAT/R: With a 25.6 V reverse standoff voltage, it clamps transients at 41.4 V max while conducting 36 A peak pulse current — sized for protecting 24 VDC power buses, relay coils, and sensor inputs in industrial control panels against inductive load dumps and lightning-induced surges.
Voltage and current ratings that define the protection window
The breakdown voltage range starts at 28.5 V minimum, ensuring the device begins conducting before the downstream circuitry sees damaging overvoltage. The 41.4 V clamping voltage at 36 A peak pulse current sets the upper limit of the protection envelope — any transient exceeding this level passes through unclamped, so the designer must verify the load's absolute maximum rating stays above 41.4 V. Operating temperature spans -65°C to 175°C junction, covering cold-start conditions in outdoor enclosures and self-heating during repetitive surge events. The DO-201AA axial package (also known as DO-27) mounts through-hole, suited for point-of-use placement on a PCB or terminal block.
EIC SEMICONDUCTOR INC. lists the 1.5KE30CAT/R as Active.