1500W clamping window for a 102V rail
The 1.5KE120CA-E3/54: The breakdown voltage range starts at 114V minimum, and the clamping voltage is held to 165V maximum at the rated 9.1A peak pulse current. That means a 102V DC bus or signal line is protected from transients that would otherwise push the rail above 165V — a typical margin for 120V-rated downstream components.
Bidirectional — one device covers both polarities
A single bidirectional channel handles positive and negative transients symmetrically, so no polarity orientation is needed during assembly. This simplifies PCB layout for AC-coupled signal lines or floating DC buses where the transient polarity is unknown.
Not for AC mains — signal and DC bus protection
The spec explicitly lists Power Line Protection as No, meaning this device is not rated for direct AC mains transient suppression. It is intended for DC power rails, signal lines, and low-voltage bus protection where the standoff voltage of 102V matches the nominal operating level.