The 1N6290A-E3/73: The 1.5 kW peak pulse power rating (10/1000 µs wave shape) defines the device's ability to absorb a single transient event without degradation — this is the primary selection parameter for any TVS diode protecting a rail that sees surge or ESD. The 17.6 A peak pulse current is the complementary figure: at a clamping event, the diode conducts that current and holds the rail at or below 85 V, protecting downstream circuitry from the spike. Standoff voltage of 53 V is the continuous working voltage the diode blocks in normal operation — the rail can sit at up to 53 VDC indefinitely without the TVS conducting. Minimum breakdown of 58.9 V establishes the threshold where the device begins conducting — there is a 5 V margin between standoff and breakdown that gives the protected rail headroom before the clamp activates. Choosing a standoff voltage that sits above the rail's maximum operating voltage but below the downstream IC's absolute-max rating is the core of TVS selection.
Axial package and through-hole integration
The DO-201AA (also referenced as DO-27) is a larger axial body suited to through-hole PCB insertion — the lead diameter and body length handle higher peak current and thermal dissipation than smaller SMD packages, which is why the 1.5KE device family uses this footprint for the 1.5 kW rating. The through-hole leads allow a soldered mechanical anchor that resists vibration, making it common in industrial and power-supply protection stages. The junction temperature limit of 175 °C (rated from -55 °C to 175 °C) gives wide thermal headroom — the diode can sit near elevated ambient temperatures without needing aggressive derating, though the PCB mounting pad and lead-length thermal resistance still govern the real-world junction in a given enclosure.
Sourcing posture
The base product number 1N6290 anchors the Vishay family — any family cross-reference check or second-source search should start there.