BMMA
BMMA

BMMA connector is a subminiature version of the BMA blindmate series and was developed in the 1980's. This originally designated OSSP™ connector by M/A-Com has excellent electrical performance at high frequencies up to 28 GHz.  SV Microwave provides a complete family of BMMA blindmate connectors and adapters.

 

BMMA connectors are approximately 25% smaller than the BMAs, and are used for applications where space is limited and no special tooling is required. They have stainless steel bodies, moisture resistance and low profile designs. BMA blindmates preserve mechanical and electrical performance with interfacial misalignment features. They also have an external spring to provide mechanical device for extensive mechanical misalignment of ± .020 radial and .060 axial minimum. They are used for defense applications, wireless infrastructure, satellite equipment and test and measurement.

 

 

 

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Product Brochure

 

Features & Benefits

Interface

 

•          Air Dielectric

•          Compliant Contacts

•          Hooded Female Contact

 

 

Mechanical

 

•          .020 Radial Float

•          .060 Axial Float 

•          Low Profile Designs

•          Stainless Steel Bodies

•          Hermetic Versions

•          Moisture Seal

 

 

Applications
  • Space Limitations
  • Satellite Communication Equipment
  • Military Radar
  • Wireless Infrastructure
  • Test and Measurement

 

Technical Specifications

General

Materials

Body: Stainless steel per AMS-5640, UNS S30300, Type I.

Contact: Beryllium Copper per ASTM-B-196

PTFE per ASTM-D-1710.

Finish 

Body: Gold plated per ASTM-B-488 over nickel per SAE AMS-QQ-N-290

 Class 1 or passivate

Center Contact: Gold plated per ASTM-B-488 over Nickel per SAE AMS-QQ-N-290

Class 1

Design

Interface dimensions per MIL-STD-348


 

Electrical

 

RG 405 (.085) Semi-Rigid

Frequency

DC to 28 GHz

Nominal Impedance

50 Ohms

VSWR

1.05 + .01f (GHz)

RF Transmission Loss

.040 x ?¯f (GHz)

Insulation Resistance 

5,000 Megohms Min.

Contact Resistance
     Center Contact
     Outer Contact
     Outer Contact to Cable  

      

       6.0 Milliohms Max.

3.0 Milliohms Max.

0.5 Milliohms Max.

Dielectric Withstanding Voltage

         675 Volts RMS

Corona Extinction Voltage at 70,000 Ft.

         250 Volts Min.

RF HighPotential at 5 MHz

675 Volts RMS.

RF Leakage
     Interface Only 

–(90-fGHz) dB Min.

(fully mated)


Mechanical

Force to Engage

48 Ounces Max.

Force to Disengage

1.5 Pounds Max.

Center Contact Retention

4 Pounds Min.

Durability

1,000 Cycles

Radial Misalignment

     Rigid Mount

     Float Mount

 

±.0025 Inch

±.020 Inch


Environmental

Temperature Rating

–65°C to +125°C (Semi-Rigid)

Corrosion (Salt Spray)

MIL-STD-202, Method 101, Condition B

Vibration

MIL-STD-202, Method 204, Condition D, 20 Gs

Shock

MIL-STD-202, Method 213, Condition I, 100 Gs

Thermal Shock

MIL-STD-202, Method 107, Condition B, -65°C to +125°C

Moisture Resistance

MIL-STD-202, Method 106, Less Step 7B

Barometric Pressure (Altitude)

MIL-STD-202, Method 105, Condition C, 70,000 Ft.

OSSP™ is a trademark of M/A-Com.