Obsolete AEC-Q101 TVS — what it means for your BOM
The 1.5KE11CAHE3/51: The official lifecycle status is Obsolete, meaning Vishay no longer manufactures this exact order code.
Clamping and breakdown — the protection envelope
This is a bidirectional Zener-type TVS, meaning it clamps voltage transients of either polarity. The reverse standoff voltage is 9.4 V typical — the signal or power rail should stay below this during normal operation to avoid leakage. Breakdown occurs at a minimum of 10.5 V, and the clamping voltage at peak pulse current is 15.6 V maximum. With a peak pulse current rating of 96.2 A (10/1000 µs), the diode can absorb a 1.5 kW surge before the clamping voltage is reached. The operating temperature range spans -55°C to +175°C, covering the full automotive under-hood ambient plus margin for self-heating during a surge event.
Package and board integration
Housed in a DO-201AA (DO-27) axial-lead through-hole package, the 1.5KE11CAHE3/51 is designed for point-to-point wiring or PCB mounting with through-hole pads. The axial leads suit high-reliability connections in vibration-prone environments like engine bays.