About the BMA Interface

The BMA series interface was developed as a “blind-mate A” class of RF microwave connector similar in line size to the SMA series. The BMA interface can operate up to 22 GHz and provides radial and axial misalignment in the blind mating engagement of the interface. This connector series is commonly used in rack and panel applications where alignment of the connectors is not easily accessible. The spring fingers in the jack help to center the plug to its proper mating condition. Float mount styles allow for continued interface mating in high vibration environments associated in military/Aerospace applications. The BMA series are often used in hybrid connector applications with a Mil-C-38999 or D-Sub style shell.


BMAtechnical diagram

click to enlarge



Nominal Impedence50 ohms ohms
Frequency RangeDC to 18 GHz
Voltage Rating335 volts rms
Dielectric Withstanding
1000 volts rms


Mating Characteristicsper MIL-STD-348
Connector Durability500 cycles min.
Recommended TorqueN/A (Push-on Blind-mate)


BodyBrass, Silver or Nickel Plated. Stainless Steel, Passivate
Contacts (Inner)Female: Beryllium Copper, Silver or Gold Plated. Male: Brass, Silver or Gold Plated
Contacts (Outer)Brass, Silver or Nickel Plated
Contacts (Slotted)Beryllium Copper, Silver or Nickel Plated
Gaskets & SealsSilicone Rubber


Tempurature Range-85°F to +257°F (-65°C to +125°C)
VibrationMIL-STD-202 Method 204
ShockMethod 2013
Moisture ResistanceMIL-STD-202 Method 106
Corrosion (salt spray)MIL-STD-202 Method 101

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BMA Performance Charts