Surge protection for DC rails and signal lines
The 1.5KE150A-E3/54: It clamps transients at 207 V maximum while the reverse standoff voltage is 128 V, meaning it stays out of circuit during normal operation and only conducts when the line exceeds that threshold. Housed in a DO-201AA (DO-27) axial-lead package, it mounts through hole and suits general-purpose protection on DC power buses, telecom lines, or industrial control inputs where a single unidirectional device is needed.
Clamping voltage and breakdown margin
The breakdown voltage range starts at a minimum of 143 V, providing a 15 V cushion above the 128 V standoff before the device begins to avalanche.