Zener TVS in SQ-MELF – 500W pulse, 9.5V clamp
The 1N6106AUS is a bidirectional Zener TVS diode from Microchip Technology, designed to clamp transients on a 7.6V reverse standoff rail with a minimum breakdown of 9.5V. It handles a 500W peak pulse under the 10/1000µs waveform, making it suitable for protecting sensitive loads in industrial and avionics power buses. The SQ-MELF B package is a surface-mount hermetic ceramic body — the same footprint as a standard MELF but with a square outline that simplifies pick-and-place alignment. The -55°C to 175°C junction range covers engine-bay and outdoor telecom enclosures where commercial-grade parts would drift.
Clamping voltage and pulse current – sizing the protection
At the 34.5A peak pulse current, the clamping voltage is held to 14.5V max. That ceiling matters when the protected IC has a 15V absolute-max rail — you get a full volt of margin before the silicon sees overstress. The bidirectional channel means the same device clamps positive and negative transients symmetrically, so you don't need a series diode for reverse-polarity protection on AC-coupled or bipolar signal lines.
Active production – no end-of-life concern
The SQ-MELF B package is a standard JEDEC outline, so second-source equivalents exist in the same footprint if the BOM ever needs a backup.