6
Subminiature Cylindrical Connector
Overview
Amphenol® Subminiature Connectors are ideally suited for the incorporation of shielded
contacts for high performance interconnection applications. The Subminiature family is
built around MIL-DTL-38999 specifications, with Mil-approved and proprietary styles
offered. Normal operating voltage for Subminiatures with power contacts only is up to 900
VAC (RMS) at sea level.
Subminiature Cylindricals offer these features for contact termination flexibility:
• Widest selection of insert arrangements that can incorporate:
• size 8, 12 and 16 Coax contacts
• size 8 and 12 Twinax contacts
• size 8 and 10 RCT (Reduced Component Twinax) contacts
• size 8, 10 & 12 Triax contacts
• Wide selection of connector shell styles and sizes
• Scoop-Proof recessed design in LJT-R, TV-R and SJT-R connectors provide
protection for contacts
• Standard power contacts are crimp rear release, qualified to MIL-C-39029
• Coax, Twinax, and Triax contacts employ the same retention system as power
contacts, simplifying user substitution
LJT-R, D38999 Series I
See Catalog 12-090 for complete information on
this series.
• Scoop-proof (recessed pins)
• Bayonet coupling, crimp termination
• Also available in solder termination types
under MIL-C-27599 Series I
JT-R, D38999 Series II
See Catalog 12-090 for complete information on
this series.
• Shorter profile connector series for applica-
tions requiring maximum space savings
• Bayonet coupling, crimp termination
• Also available in solder termination types
under MIL-C-27599 Series II
TV-R, Tri-Start, D38999 Series III
See Catalog 12-092 for complete information on
this series.
• High performance capability series for both
general duty and severe environment appli-
cations
• Offers the widest range of Subminiature Fam-
ily Mil-Spec qualified options in contact and
connector styles
• Threaded coupling; completely mates in one
turn; crimp termination
• Superior EMI/EMP shielding effectiveness
• Scoop-proof design (recessed pins)
• Available in aluminum, stainless steel and
firewall, or lightweight composite styles
Amphe-Lite, 38999 Type
See Catalog 12-094 for complete information
on this series.
• New Commercial/Industrial 38999 Series
III type
• Offers a cost effective high performance
connector for severe environments or
general duty industrial applications
• Composite shells are lighter weight
• Scoop-proof design (recessed pins)
• Conductive finish available for EMI pro-
tection, or non-conductive finish option
SJT-R, 38999 Type
See Catalog 12-091 for complete information
on this series.
• Amphenol proprietary series (non-MS)
which is a further expansion of the basic
JT family, but incorporates the LJT scoop-
proof design
• Compliant with several European specifi-
cations
GENERAL ORDERING INFORMATION
Amphenol Subminiature Cylindricals, which feature rear removable contacts, are normally
supplied with a full complement of power contacts, separately packaged. Coax, twinax and
triax contacts are ordered by part number as referenced in the part number charts on the fol-
lowing pages of this catalog, and are substituted for the power contacts at the time of the
cable or equipment assembly. If the application is for coax, twinax or triax contacts only, the
connector may be ordered
less contacts
and no power contacts will be supplied. Complete
installation instructions for the coaxial and twinax and triax contacts are supplied within the
contact package. See page 36 that gives a typical contact instruction sheet for coax contacts.
HOW TO ORDER:
A. Select the Subminiature Series desired. (See features of each series referenced above).
The catalog referenced for each series will be necessary to complete the connector order-
ing part number. (Catalogs are on-line at www.amphenol-aerospace.com).
Catalog 12-090 - JT-R, LJT-R Connectors
Catalog 12-092 - TV-R Connectors
Catalog 12-091 - SJT-R Connectors
Catalog 12-094 - Amphe-Lite (Industrial 38999 type)
B. Select the coax, twinax and/or triax contacts that are needed from the tables on the follow-
ing Subminiature Cylindrical pages that correspond to the cable being used.
C. Select the insert arrangement to accommodate required number of contacts. See the
Subminiature Cylindrical insert pattern illustrations on pages 19-21.
D. Complete the connector part number from the connector series catalog, incorporating the
chosen insert pattern number.
E. If connector is ordered
less contacts
, power contacts and/or sealing plugs may be ordered
separately to fill out the insert arrangement.