Clamping window and transient energy rating
The 1.5KE30CA-E3/54: The reverse standoff voltage is 25.6 V; breakdown occurs between 28.5 V and clamp at 41.4 V. This defines the protection window for a 24 V nominal rail — the device stays transparent below 25.6 V and clamps transients before they exceed 41.4 V. Peak pulse current reaches 36.2 A under the same 10/1000 µs condition, meaning the diode can sink a substantial surge without exceeding junction temperature limits. The wide operating temperature range from -55°C to 175°C suits deployment in outdoor telecom, industrial control cabinets, and under-hood automotive modules where ambient extremes are routine.
Package and board integration
Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE30CA-/54 mounts through-hole. The base product number is 1.5KE30; the CA suffix denotes bidirectional clamping. No power line protection is built in — this is a general-purpose TVS for signal and low-voltage DC bus protection, not for AC mains.
No official successor or second-source cross-reference is recorded. The 1.5KE series is a mature, widely used TVS family; pin-compatible alternatives from other manufacturers exist but are not documented here as direct replacements.