
Combo-D
Sub-D
INDUSTRIAL AND MILITARY QUALITY
SUBMINIATURE-D CONNECTORS
FOR MILITARY AND SHELTERED
INDOOR/OUTDOOR ENVIRONMENTAL APPLICATIONS
2
DIMENSIONS ARE IN INCHES [MILLIMETERS].
ALL DIMENSIONS ARE SUBJECT TO CHANGE.
Positronic Industries, Inc.
www.connectpositronic.com
CBD/CBM
SERIES
COMBO-D SERIES TECHNICAL CHARACTERISTICS
MATERIALS AND FINISHES:
Insulator:
Glass filled polyester per MIL-M-24519 UL
94V-0, blue color, and composite.
Signal Contacts:
Male contacts-precision machined brass
alloy. Female contacts-precision machin-
ed high tensile phosphor bronze.
Signal Contact Plating:
Gold flash over nickel plate and gold 0.000050
[1.27] over nickel plate. Other finishes avail-
able upon request.
Power Contacts:
Machined of high conductivity copper
alloy for both male and female contacts.
Power Contact Plating:
Gold flash over nickel. Other finishes avail-
able upon request.
Shielded and High
Male contacts-precision machined brass.
Voltage Contacts:
Female contacts-precision machined high
tensile phosphor bronze.
Shielded and High Voltage
Signal contact-gold flash over nickel.
Contact Plating:
Other finishes available upon request.
Shells:
Steel or brass with tin plate; zinc plate with
dichromate seal, stainless steel passivated.
Other materials and finishes available upon
request.
Mounting Spacers
Nylon plastic, or brass with tin plate; zinc
and Brackets:
plate with dichromate seal.
Push-On Fasteners:
Phosphor bronze and beryllium copper with
tin plate.
Jackscrew Systems:
Steel with zinc plate and dichromate seal,
or clear zinc plate.
Hoods:
Composite and plastic, UL 94V-0, brass or
steel with zinc plate and dichromate seal.
ELECTRICAL CHARACTERISTICS:
SIGNAL CONTACTS
Contact Current Rating:
7.5 amperes nominal.
Initial Contact Resistance:
0.008 ohms maximum.
Proof Voltage:
1000 V r.m.s.
POWER CONTACTS
Contact Current Rating:
10, 15, 20, 30 and 40 amperes nominal.
Initial Contact Resistance:
0.0005 ohms max. per IEC 512-2, Test 2b.
Proof Voltage:
1000 V r.m.s.
SHIELDED CONTACTS
Initial Contact Resistance:
0.008 ohms maximum.
Nominal Impedance:
50 ohms.
Insertion Loss:
-0.46 dB at 1 GHz
-1.5 dB at 2 GHz
VSWR:
1.15 average at 1 GHz
1.56 average at 2 GHz
Above values measured using frequency domain techniques.
Proof Voltage:
1000 V r.m.s.
HIGH VOLTAGE CONTACTS
Flash over Voltage:
3600 V r.m.s.
Proof Voltage:
2700 V r.m.s.
Initial Contact Resistance:
0.008 ohms maximum.
CONNECTOR
Insulator Resistance:
5 G ohms.
Clearance and
Creepage Distance:
0.039 inch [1.0mm] minimum.
Working Voltage:
300 V r.m.s.
MECHANICAL CHARACTERISTICS:
Signal Contacts,
Size 20 contacts, male contact-0.040 inch
Fixed:
[1.02mm] diameter. CBD Series has open
entry design female contacts. CBM Series
has closed entry design female contacts.
Contact Retention
Signal-9 lbs. [40N]. Power, shielded and
in Insulator:
high voltage-22 lbs [98N].
Resistance to Solder Iron Heat: 500F [260C] for 10 seconds duration
per IEC 512-6.
Signal Contact
Solder contacts - 0.042 inch [1.06mm]
Terminations:
minimum hole diameter for 20 AWG [0.5
mm2] wire maximum.
Straight Printed Board Mount – 0.028 inch
[0.71mm] diameter.
90° Printed Board Mount – 0.028 inch
[0.71 mm] diameter.
Power Contacts,
Size 8 contact, male contact – 0.142 inch
Removable, Crimp
[3.61mm] diameter. Female contact fea-
or Solder Termination:
tures Large Surface Area (L.S.A.) closed
entry contact design utilizing BeCu
mechanical retention member. Male and
female contacts have terminations for
wire sizes 8, 12 and 16 AWG.
Power Contacts,
Size 8 contact, male contact – 0.142 inch
Printed Board Mount:
[3.61mm] diameter. Printed board termina-
tions with 0.078 inch [1.98mm], 0.093 inch
[2.36mm] and 0.125 inch [3.18mm] diameters.
Shielded Contacts,
See table of maximum cable sizes for contact
Removable:
termination dimensions.
High Voltage Contacts:
Straight and 90° terminations – 0.041 inch
[1.04mm] minimum hole diameter.
Shells:
Male shells may be dimpled for EMI/ESD
ground paths.
Polarization:
Trapezoidally shaped shells and polarized
jackscrews.
Mounting to Angle Brackets:
Jackscrews and riveted fasteners with
0.120 inch [3.05mm] diameter hole, and
threaded riveted fasteners with 4-40
threads and nylon inserts.
Mounting to Printed Board:
Rapid installation push-on fasteners and
threaded posts.
Locking Systems:
Jackscrews.
Mechanical Operations,
CBD Series, 500 operations, CBM
Signal Contacts:
Series, 1,000 operations per IEC 512-5.
CLIMATIC CHARACTERISTICS:
Temperature Range:
-55°C to +125°C.
Damp Heat, Steady State:
10 days.