FPGA Mezzanine Card, or FMC, as defined in VITA 57, provides a specification describing an I/O mezzanine module with connection to an FPGA or other device with reconfigurable I/O capability. 

It specifies a low profile connector and compact board size for compatibility with several industry standard slot card, blade, low profile motherboard, and mezzanine form factors including VME, VPX, CompactPCI, AdvancedTCA, MicroTCA, PCI, PXI, and many other low profile motherboards.

VITA FMC Forum

The FMC specification has two defined sizes that are referred to as a single width, and a double width module. The single width module has a width of 69mm and the double width module has a width of 139mm. The depth of both is 76.5mm.

FMCs are being used in a wide range of markets and environments supporting a wide range of I/O interfaces. The standard describes options to create modules for operating in a range of environments from passively cooled to fully ruggedised conduction cooled.

This web site can only detail a representative sample of the complete range. For a detailed review of your application please contact one of the engineering team to discuss your requirements.