8D Series
BMA Coaxial Contacts

8D with High Frequency Coaxial Contact
A robust and powerfull coaxial High Frequency transmission (BMA) now
available in any size 8 SOURIAU insert of D38999 Series III.
Spring HF contact

Vibration and High Frequency.

DC1G8Hz
Largest Flexibility
Qualified coaxial contact
Easy mounting

16 layouts available.

Interface according MIL-STD-348A/321.

Removable contact.

8D Series | BMA Coaxial Contacts
Description• Quick screw coupling D38999 connector• Shell available in aluminum, composite,
Stainless steel, Titanium & Bronze• 16 layouts available with coaxial contact• High Frequency coaxial contact: DC 18GHz• Qualified coaxial contact according to
MIL-STD-348A/321• Removable coaxial contact• Contacts delivered with boots

Technical features
BMA contact features• Moisture resistance:
MIL-STD-202, method 106• Corrosion: Salt spray test according to
MIL-STD-202, method 101, condition B

Electrical• Impedance: 50Ω
• Frequency range: DC 18GHz• Vibration:
MIL-STD-202, method 204, condition D• Shock:
MIL-STD-202, method 213, condition I/!\ Caution: be careful that your application doesn’t exceed
contact specification.

• Dielectric withstanding voltage:
1.5 kVrms, 50Hz (at sea level)• Insulation resistance: ≥ 5 000 MΩ
• Contact resistance:. center contact: ≤ 2 mΩ. outer contact: ≤ 2 mΩ• Return loss (DC-18GHz):< -17dB (mated connector)• RF leakage interface only (fully mated):≥ 90 dB f (GHz) measured at interface withreference planes being in true alignment.
• RF testing voltage:
1.0 kVrms, 5 MHz (at sea level)• Admissible power:≤ 300 W at 3 GHz (at sea level & room T°)• Temperature range: -65°C +125°C• Thermal shock:
MIL-STD-202, method 107, condition B• Vibration:. Sinus:. 10 à 2000 Hz, 3x12 hrs(60g, 140 - 2000 Hz) with T° cycling. Random:. 50 to 2000 Hz, 2x8 Hrs(1g2/ Hz, 100 - 2000Hz) at T° max.
. 25 to 2000 Hz, 2x8 Hrs(5g2/ Hz, 100 - 300Hz) at ambiant T°
Test with accessories in acc with EN2591-D3

Electrical

Connector features
Mechanical• Shell material & plating:. Aluminum:Cadmium olive drab (W)		Nickel (F)		
Black zinc nickel (Z)		
Green zinc cobalt (ZC)
. Composite:
Cadmium olive drab (J)		Nickel (M)		
Without plating (X). Stainless steel: Passivated (K)		Nickel (S). Titanium:
Without plating (TT)		Nickel (TF)
. Bronze:		
Without plating• Insulator: Thermoplastic

Environmental• Shock: 300g, 3 ms (EN 2591-D2 method A)• Grommet and interfacial seal:
Silicone elastomer• Contact endurance: 1000 mating cycles• Connector endurance: 500 mating cycles• Shell continuity:. F, S & TF:
1 mΩ
. W, Z & ZC: 2.5 mΩ
. K & TT:
10 mΩ• Shielding:. F & M:		. K & TT:		
. W & Z:		. F, S & TF:. Bronze:		
. J:		
. ZC:		

. J & M: 3 mΩ. Bronze: 5 mΩ

85 db at 1 GHz
45 db at 10 Ghz
50 db at 10 GHz
65 db at 10 GHz
85 db at 10 GHz
90 db at 10 GHz
Consult us

Environmental• Temperature range:. W, ZC, J, X & bronze:. F, Z, M, K, S, TT & TF:-65°C +175°C-65°C +200°C• Salt spray:. F, S & TF:		
. ZC:			. W, Z, K, TT & bronze:. J, M & X:		48 Hours
250 Hours
500 Hours
2000 Hours

28D Series | BMA Coaxial Contacts
Contact layouts

Specification 737 mandatory
Contact #22D

Contact #12

Contact #20

Contact #8 Coax

Contact #16

11178002

2275

1#8 Coax

38#22D
1#8 Coax

2#12
2#8 Coax

2#8 Coax

1921

18

20

48

75

77

06

14#22D
4#8 Coax

18#20
2#8 Coax

4#8 Coax

4#8 Coax

17#22D2#8 Coax

6#8 Coax

23

25
07

08

1720

41

46

2#8 Coax
97#22D

8#8 Coax

36#22D
6#8 Coax

10#20, 13#16
4#12 Coax
3#8 Coax

22#22D, 3#20
11#16, 2#12
3#8 Coax

40#20, 4#16
2#8 Coax

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8D Series | BMA Coaxial Contacts
Ordering information
8DBasic Series

025

W46PN

737

Shell style:
0: Square flange receptacle
1: In line receptacle
7: Jam nut receptacle
5: Plug with RFI shielding
Shell size:
11, 17, 19, 21, 23, 25
Aluminum plating:
W: Olive drab cadmium
F: Nickel
Z: Black zinc nickel
Contact layout:
See previous page
Contact type:
P: Pin
S: Socket
Orientation:
N, A, B, C, D, E
Specification (mandatory):
737: Coaxial contacts - for .086’’ flexible cable
747: Coaxial contacts - for .141’’ flexible cable
For other material and configuration (integrated clinch nuts, double flange, other cables, ...) please consult us.

Recommended cables
Designation

Part number.086’’ flexible cableMultiflex 86.141’’ flexible cableMultiflex 141

Description
Outer conductor
contact

Soldered

For other cables please consult us.

Dimensions
For shells dimensions,please see «8D Series,
MIL-DTL-38999 Series III»
SOURIAU catalog.
www.souriau.com

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8D Series | BMA Coaxial Contacts
Assembly Instruction

CD
No shrinking sleeve allowed.

APicture

Process

10.5

Dip the cut length of cablein flux and tin.

7Cut the jacket to the braid.
Remove jacket.

AAll information in this document presents only general particulars and shall not form part of any contract. All rights reserved to SOURIAU for changes without prior notification or public announcement. Any duplication is prohibited, unless approved in writing.

B

Remove cable dielectricand tinned braid according
to diagram.

B
2.6

Form tip of centre contact
to a 90° cone.

2Feature / CheckTools required

The solder must flow atrear for min. 7 mm.

Stanley blade

Do not damage innerconductor, dielectric andbraid of cable.

Stanley blade
Tip trimmer

Slide ferrule C over cable,flush to dielectric.
CX

Solder at X.
Avoid excessive heat,
immediately cool down
and clean with alcohol.

BA

Push prepared cable into
connector body D andtighten nipple B.
DBATaper sleeve A will be used
for MIL-connector.

If the cable does not fit
into the cable entry, use aflat-nose plier to calibrate
the braid.
Center conductor of cablemust be exactly centered.

Torque: 3 Nm.

WDSCOAXBMAWUSEN01 © Copyright SOURIAU July 2020 - SOURIAU is a registered trademark.

Slide Taper sleeve A andnipple B over cable.

Soldering ironSolder
Flat-nose pliers

Male contact:
Torque wrench AF.6 (3 Nm)
Spanner AF.5.5
Female contact:
Torque wrench AF.6 (3 Nm)
Spanner AF.6

For further information contact us at technical.emear@souriau.com (Europe - Asia - Africa)
technical.americas@souriau.com (North America)
or visit our web site www.souriau.com

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