1.5KE10-E3/54 — 1500W TransZorb Zener TVS, now obsolete
It clamps at 15V max at 100A peak pulse current, with an 8.1V reverse standoff voltage and a 9V minimum breakdown threshold. No power line protection — it is a general-purpose transient suppressor for DC rail or signal-line clamping.
What the ratings mean for circuit protection
The 8.1V reverse standoff is the maximum continuous DC voltage the device can withstand without conducting — a 5V or 3.3V rail sits well below this, but an unregulated 12V bus would keep it in standby. The 9V minimum breakdown ensures the TVS begins clamping before the protected circuit's absolute maximum rating is reached. At 100A peak pulse current (10/1000µs waveform), the clamping voltage rises to 15V max — that is the voltage the downstream silicon sees during the surge. The 1500W peak pulse rating means the device absorbs a single 1ms-wide surge up to that energy without failing short.
Obsolete — sourcing through independent channels
Vishay has marked the 1.5KE10-/54 as obsolete. New-old-stock and surplus inventory is available through independent distribution. Each lot is date-code and quantity verified at RFQ. No lead-time or stock-holding claim is made here — availability is confirmed per request against your BOM line quantity. The DO-201AA axial package is a standard footprint — a replacement part from another manufacturer with the same mechanical outline and electrical ratings (8.1V standoff, 1500W peak pulse) can drop in without PCB changes, but the electrical characterization (clamp voltage, breakdown tolerance) must be cross-checked against the original design margin.