FLTStack 0.50mm Floating Board-To-Board Connectors Amphenol Commercial FLTStack Floating Board-To-Board (BTB) Connectors are engineered to operate at a minimum of ±0.5mm floating range in the XY directions. The FLTStack series offers a self-cleaning function, vibration resistance, and self-alignment for easy mating. Amphenol Commercial FLTStack floating BTB Connectors connectors support up to 3Gb/s communication data rates and up to 0.5A/pin current rating. These connectors provide a 0.9mm effective mating length that offers Z directions with sufficient margin for the mating stroke.