What this Zener TVS does for your board
It clamps transients at 14.07V maximum while standing off 6.9V continuously — a tight ratio that keeps protected rails from seeing overshoot during surge events. A single device covers both polarities, so you don't need back-to-back Zeners on AC-coupled or bidirectional signal lines.
Minimum breakdown voltage is 8.22V, which means the diode starts conducting just above the 6.9V standoff level.
Temperature range and package — where it fits
The SQ-MELF (B case) is a hermetic-style surface-mount package — no exposed leads, good for high-reliability and conformal-coated assemblies. Hand-solderable with care; the barrel body needs a steady iron and good flux.
Microchip lists the 1N6105US as Active.