1500W TransZorb TVS — Last Buy lifecycle
The 1.5KE250A-E3/51: The Vishay 1.5KE250A-/51 is a 1500W unidirectional TransZorb TVS diode in the through-hole DO-201AA axial package. It clamps transients at 344V max when hit with a 4.4A 10/1000µs pulse, protecting downstream silicon from surges up to that energy level. This part carries a Last Buy lifecycle status — the manufacturer has issued an end-of-life notice, and remaining inventory is finite. For any BOM line depending on this order code, the window to secure lifetime buy quantities is closing.
Clamping voltage and breakdown window
The reverse standoff voltage is 214V typical — the diode draws negligible leakage below this rail. Breakdown occurs at a minimum of 237V, and the clamping voltage at peak pulse current is 344V max. That 103V window between standoff and clamp defines the protection margin for a 240VAC or 200VDC bus.
Temperature range and package
No power line protection feature is built in — this is a basic unidirectional TVS for signal or DC rail clamping, not for AC mains primary protection.