The choice of MDR connector should be compatible with the chosen board processing technology. Boardmount MDR connectors are available in through-hole, surface mount and straddle mount versions which require soldering. Press-fit versions, using a compliant pin or eye of the needle design contact, secure the contact in the circuit board without the need for soldering. To ensure proper placement during board processing, consider the board retention options that are available to ensure they are compatible with the contractor’s processing capabilities.