500W Zener TVS in SQ-MELF B — transient protection for harsh environments
The 1N6117AUS/TR is a bidirectional Zener transient-voltage-suppression diode rated for 500W peak pulse power at 10/1000µs, with a reverse standoff voltage of 22.8V and a maximum clamping voltage of 41.6V at 12A peak pulse current. The SQ-MELF B package suits surface-mount assembly on boards where a hermetically sealed glass body is preferred over plastic for moisture resistance or high-reliability programs.
Junction temperature range and operating environment
The junction temperature range spans -55°C to 175°C, which covers military, avionics, and downhole applications where the ambient temperature can exceed the ceiling of many plastic-packaged TVS diodes. The wide temperature window also means the leakage current and clamping voltage shift less across the operating band than a narrower-grade part — a real advantage when the protected rail must stay within a tight voltage window at high temperature.
Active production — no obsolescence concern for new builds
Microchip lists the 1N6117AUS/TR as Active, so it remains available for both new-design-in and ongoing BOM replenishment.
Bidirectional channel — one device protects both polarities
With a single bidirectional channel, this TVS clamps transients of either polarity symmetrically, which simplifies board layout on AC signal lines or dual-polarity DC rails where two unidirectional devices would otherwise be needed. The 28.5V minimum breakdown voltage ensures the device does not conduct during normal 22.8V standoff operation, leaving the signal rail undisturbed until a surge event occurs.