1500 W peak pulse, 27.7 V clamp — the protection envelope for a 17.1 V rail
The 1.5KE20CA-E3/73: Its 27.7 V maximum clamping voltage at 54.2 A peak pulse current defines the voltage the downstream circuitry must survive during a transient event. With a 17.1 V reverse standoff voltage, this part protects a nominal 12 V or 15 V rail — the TVS remains transparent below the standoff and only conducts when the transient exceeds the 19 V minimum breakdown threshold.
Bidirectional clamp for AC or bipolar signal lines
Single bidirectional channel means the TVS clamps symmetrically in both polarities — one device protects a signal pair or an AC-coupled line without needing two back-to-back unidirectional parts. The through-hole DO-201AA / DO-27 axial package suits point-to-point wiring on a terminal block or a PCB with drilled holes — the lead bend absorbs board flex and the body handles the thermal pulse of a 1500 W event without cracking the epoxy.
Active production, general-purpose deployment
Listed for General Purpose applications — no power-line protection rating, so it is intended for signal and low-power DC rail clamping rather than mains AC input protection.