TE Connectivity (TE) Free Height surface-mount connectors are designed for parallel board stacking applications using sub-miniature connectors to meet today's electronic industry requirements for high-density packaging. These FH connectors fit a broad spectrum of interconnect uses and are ideal for application downsizing, such as notebook PCs, scanners, data storage devices, and many other applications which require parallel stacked PCBs. FH connectors provide a range of position sizes form 40 - 440 positions in contact pitches of .5, .6, .8 and 1.0 mm. By mating various combinations of vertical plug and receptacle housing heights, board-to-board stack heights from 4-20 mm can be achieved in 1 mm increments.This quick reference guide provides guidance for selecting a mezzanine connector, including how to measure and mounting styles.