Zener TVS for high-surge rail protection
It clamps at 30.5V maximum when hit with a 49.2A surge, and its 16.7V reverse standoff voltage means it sits quietly on a 16V or lower rail until the transient arrives. The SQ-MELF C package is a surface-mount, non-hermetic ceramic barrel — the same footprint as a standard MELF but with a square body for better pick-and-place alignment.
Clamping voltage and standoff margin
The 20.9V minimum breakdown voltage gives a 4.2V guard band above the 16.7V standoff — enough to absorb DC rail ripple without false triggering. The 30.5V clamp is the ceiling the protected circuitry must survive; a 16V-rated bus with 20% margin (19.2V) sits comfortably under that clamp. Bidirectional construction (single channel) means the same device clamps positive and negative transients symmetrically — no polarity concern on AC signal lines or floating rails.
Active production — no LTB pressure
Microchip lists the 1N6150AUS as Active. The base product number 1N6150 covers a family of standoff voltages; the AUS suffix denotes the SQ-MELF C package. Sourced to order against your BOM quantity. Current pricing and lead time confirmed at quote — no stock-holding claim, no immediacy promise.