Amphenol JT/LJT Subminiature
Cylindrical Connectors
12-090-18
®
Amphenol JT Connectors
MIL-DTL-38999 Series II Crimp and
MIL-C-27599 Series II Solder
Amphenol LJT Connectors
MIL-DTL-38999 Series I Crimp and
MIL-C-27599 Series I Solder
Amphenol
Table of Contents
Description
Page
Amphenol
®
JT/LJT General Information ............................................................................... 1
JT/LJT - The subminiature cylindrical for every application ................................................. 2
JT/LJT - Specifications ......................................................................................................... 3
JT/LJT - Insert availability and identification; alternate positioning .................................. 4, 5
JT/LJT - Insert availability and identification ........................................................................ 6
JT/LJT - Insert arrangements ....................................................................................... 7 – 11
JT - Crimp, JT00R (MS27472) wall mounting receptacle .................................................. 12
JT - Crimp, JTPQ00R (MS27497), wall mounting receptacle, back panel mounting ........ 13
JT - Crimp, JT01R, line receptacle ..................................................................................... 14
JT - Crimp, JT02R (MS27499), box mounting receptacle ................................................. 15
JT - Crimp, JTP02R (MS27508), box mounting recept., back panel mounting ................. 16
JT - Crimp, JT06R (MS27473), straight plug ..................................................................... 17
JT - Crimp, JTG06R (MS27484), straight plug with grounding fingers .............................. 18
JT - Crimp, JT07R (MS27474), jam nut receptacle ........................................................... 19
JT - Crimp, JTL07R, jam nut receptacle, miniature jam nut mounting dimensions ........... 20
JT - Crimp, JT08R (MS27500), 90° plug ............................................................................ 21
JT - Hermetic, JT00 (MS27475), wall mounting receptacle ............................................... 22
JT - Hermetic, JT02 (MS27476), box mounting receptacle ............................................... 23
JT - Hermetic, JT07 (MS27477), jam nut receptacle ......................................................... 24
JT - Hermetic, JTI (MS27478), solder mounting receptacle .............................................. 25
JT - Accessories, plug protection cap ................................................................................ 26
JT - Accessories, receptacle protection cap ...................................................................... 27
JT - Accessories, strain relief (crimp type) ......................................................................... 28
LJT - Crimp, LJT00R (MS27466) wall mounting receptacle .............................................. 29
LJT - Crimp, LJTPQ00R (MS27656) wall mounting receptacle, back panel mounting ..... 30
LJT - Crimp, LJT01R line receptacle .................................................................................. 31
LJT - Crimp, LJT02R (MS27496) box mounting receptacle .............................................. 32
LJT - Crimp, LJTP02R (MS27505) box mounting receptacle, back panel mounting ........ 32
LJT - Crimp, LJT06R (MS27467) straight plug .................................................................. 33
LJT - Crimp, LJT07R (MS27468) jam nut receptacle ........................................................ 34
LJT - Hermetic, LJT00 (MS27469) wall mounting receptacle ............................................ 35
LJT - Hermetic, LJT07 (MS27470) jam nut receptacle ...................................................... 36
LJT - Hermetic, LJTI (MS27471) solder mounting receptacle ........................................... 37
LJT - Accessories, plug protection cap .............................................................................. 38
LJT - Accessories, receptacle protection cap .................................................................... 39
LJT - Accessories, strain relief (solder type) ...................................................................... 40
JT/LJT - Crimp contacts, printed circuit board, wire wrap contacts (sockets) ................... 41
LJT - Printed circuit board, wire wrap contacts (sockets) .................................................. 42
JT/LJT - Printed circuit board, wire wrap contacts (pins) ................................................... 43
JT/LJT - Accessories, Universal “Header Assembly” for flex print or PCB mounting .. 44, 45
JT/LJT - Thermocouple contacts, plastic protection caps, sealing plugs .......................... 46
JT/LJT - Application tools ................................................................................................... 47
JT/LJT - Solder contact connectors ................................................................................... 48
JT/LJT - How to Order ........................................................................................................ 49
Specials - JT/LJT Connectors Types - Filter, Aquacon, Breakaway/Quick Disconnect ..... 50
Specials - JT/LJT Ground Plane Connectors ..................................................................... 51
Sales Office and Distributor Listing .................................................................................... 52
NOTE:
The connector products in this brochure were formerly known as Bendix
®
products. These products are now manufac-
tured and sold under the Amphenol
®
brand name. The name “Amphenol” will replace the name “Bendix” on products and
literature in the future.
MS Number
Page
MS20047 ............................... 39
MS20048 ............................... 38
MS27352 ............................... 26
MS27353 ............................... 27
MS27466 ............................... 29
MS27467 ............................... 33
MS27468 ............................... 34
MS27469 ............................... 35
MS27470 ............................... 36
MS27471 ............................... 37
MS27472 ............................... 12
MS27473 ............................... 17
MS27474 ............................... 19
MS27475 ............................... 22
MS27476 ............................... 23
MS27477 ............................... 24
MS27478 ............................... 25
MS27479 ............................... 12
MS27482 ............................... 22
MS27483 ............................... 24
MS27484 ............................... 18
MS27488 ............................... 44
MS27496 ............................... 32
MS27497 ............................... 13
MS27499 ............................... 15
MS27500 ............................... 21
MS27501 ............................... 38
MS27502 ............................... 39
MS27503 ............................... 25
MS27505 ............................... 32
MS27506-2 ........................... 28
MS27508 ............................... 16
MS27510 ............................... 26
MS27511 ............................... 27
MS27656 ............................... 30
See Amphenol catalogs on-line at: www.amphenol-aerospace.com
Amphenol Aerospace is a Certified ISO 9001 Manufacturer
Amphenol
®
JT/LJT
high reliability and high contact density
with maximum weight and space savings
Amphenol
®
LJT and JT Series subminiature cylindrical
connectors are qualified to MIL-DTL-38999*, Series I and
II respectively. These connectors were developed to meet
the needs of the aerospace industries, and provided the
impetus for development of the MIL-C-38999 specifica-
tions, which recently were superseded by MIL-DTL-38999.
Meeting or exceeding MIL-DTL-38999 requirements, Am-
phenol
®
JT/LJT connectors feature:
Amphenol
®
JT Connector
• Lightweight, Space Saving Design
• Contact Protection -
100% scoop-proof LJT design
prevents bent pins and short circuits during mating
• Quick Positive Coupling
- 3 point bayonet lock system
• Mismating Eliminated
- with 5 key/keyway design
• Error Proof Alternate Positioning
- insured by different
key/keyway locations
• EMI Shielding
- grounding fingers standard in LJT
Series; optional in JT Series
• Nine Shell Sizes and a Variety of Shell Styles
• Contact Options
- size 8, 10, 12, 16, 20, 22M and 22D
Crimp, Solder, PCB, Wire wrap, Coax, Twinax, Triax,
Thermocouple, Fiber Optic and Filter
• Fixed Solder Contacts
- per MIL-C-27599 (see page 52
and Amphenol Product Data Sheet 158)
• Hermetic
- air leakage limited to 1 X 10
-7
cm
3
per
second optional
• “Breakaway” Lanyard Release Style
- available in LJT
plugs. Provides quick disconnect of the connector plug
and receptacle with axial pull on the lanyard. See pages
38-41.
• Inventory Support Commonality
- uses standard MIL-
DTL-38999 contacts, insert arrangements and applica-
tion tools.
•
RoHS Compliant Product Available -
pheno
l
Am
Consult Amphenol Aerospace Operations.
HS
Ro
U
E
/2
002
/
95
/
Amphenol
®
LJT Connector
For additional information on Amphenol JT/LJT connectors,
or for special application requirements, contact your local sales
office or:
Amphenol Corporation
Amphenol Aerospace
40 – 60 Delaware Avenue, Sidney, NY 13838-1395
Telephone: 607-563-5011 Fax: 607-563-5157
www.amphenol-aerospace.com
Where proof of high reliability and lot control is required, MS
approved equivalents to most proprietary JT and LJT connectors
are available.
* MIL-DTL-38999 Series I supersedes MIL-C-38999 Series I.
MIL-DTL-38999 Series II supersedes MIL-C-38999 Series II.
1
C
E
JT/LJT
the subminiature cylindrical
for every application
Components
Shell components are impact extruded or machined
bar stock aluminum. Standard plating on shell com-
ponents is cadmium over nickel. Many finishes are
optional (see “Specifications” page 3). Hermetic seal
receptacles are available in carbon steel or stain-
less steel shells. Dependable 5 key/keyway polar-
ization with bayonet lock coupling is incorporated
to aid and assure positive mating.
Insert material is a rigid dielectric with excellent elec-
trical characteristics, providing durable protection
for molded-in solder type contacts. Contrasting let-
ter or number designations are used on insert faces.
A fluorinated silicone interfacial seal wafer is fea-
tured on the mating face of “crimp type pin” inserts.
This assures complete electrical isolation of pins
when connector halves are mated. In addition, a
main joint gasket is installed in the receptacle for
moisture sealing between connector halves. Both
features are also available for hermetic receptacles.
Wall
Mounting
Receptacle
Wall
Mounting
Receptacle
Box
Mounting
Receptacle
Line
Receptacle
Straight
Plug
Jam
Nut
Receptacle
Contacts
Maximum design flexibility is built into the JT/LJT
Series, with a minimum of 2 to a maximum of 128
circuits per connector in a wide variety of contact
arrangements. Contacts are available in sizes 8,
10, 12, 16, 20, 22, 22D and 22M with standard 50
micro inch minimum gold plating (100 micro inches
optional). All socket contacts are probe proof. Crimp
type rear removable contacts are featured in JT-R
and LJT-R connectors. Solder termination contacts
are also available, as well as PCB, wire wrap, ther-
mocouple, fiber optic, coaxial, triaxial and twinax
contact options.
Jam Nut
Receptacle
Straight
Plug
90° Plug
Solder
Mounting
Receptacle
Optional Features
High temperature capability of 392°F is available
only in JTS or LJTS crimp type connectors. High
temperature versions feature gold plated contacts,
high temperature shell plating, stainless steel cou-
pling nut spring, and epoxy inserts/fluorinated sili-
cone grommet combination. Standard temperature
capability for both solder and crimp is 302°F.
The JTN or LJTN type connectors are available for
N
2
O
4
resistance provided they are mated, and un-
grommeted rear faces are suitably protected.
For complete listing and definition of connector
types, shell styles and service classes, see How to
Order, page 53. For information on Fail-Safe Lan-
yard Release style plugs see pages 38-41.
Lanyard
Release
Plug
Solder
Mounting
Receptacle
2
JT/LJT
specifications
CONTACT RATING
Test Current
Contact
Size
22M
Solder &
Crimp
3
Hermetic
2
Maximum
Millivolt Drop
Crimp*
45
Maximum
Millivolt Drop
Solder*
20
Hermetic*
60
Contact
Size
22M
22D
22D
5
22
20
16
12
3
5
7.5
13
23
73
3
5
10
17
73
55
49
42
33
85
20
20
20
20
NA
85
60
85
85
NA
22
20
16
12
10 (Power)
Crimp Well Data
Well
Nominal
Diameter
Well Depth
.028 ±.001
.0345 ±.0010
.0365 ±.0010
.047 ±.001
.067 ±.001
.100 ±.002
.137 ±.002
.141
.141
.141
.209
.209
.209
.355
+.004
–.000
+.004
.044
–.004
+.000
.078
–.004
.116 +.004
–.002
.036
NA
.094
.125
.141
.141
NA
Solder Well Data
Well
Nominal
Diameter
Well Depth
.029
+.004
–.000
* 10 (Power)
When tested using silver plated wire.
33
NA
SERVICE RATING**
Service
Rating
M
N
I
II
Suggested Operating Voltage
(Sea Level)
AC (RMS)
DC
400
300
600
900
500
450
850
1250
Test Voltage
(Sea Level)
1300 VRMS
1000 VRMS
1800 VRMS
2300 VRMS
Test Voltage
50,000 ft
550 VRMS
400 VRMS
600 VRMS
800 VRMS
Test Voltage
70,000 ft
350 VRMS
260 VRMS
400 VRMS
500 VRMS
Test Voltage
110,000 ft
200 VRMS
200 VRMS
200 VRMS
200 VRMS
** Please note that the establishment of electrical safety factors is left entirely in the designer’s hands, since he is in the best position to know what peak voltage,
switching
surges, transients, etc. can be expected in a particular circuit.
FINISH DATA
Aluminum Shell Components Non-Hermetic
Suffix
Finish
Cadmium Plated Nickel Base
Anodic Coating (Alumilite)
Chromate Treated (Iridite 14-2)
Olive Drab Cadmium Plate Nickel Base
Electroless Nickel
MS (B)
MS (F)
Military
MS (A)
MS (C)
Proprietary
–
(005)
(011)
(014)
(023)
Indicated Finish Standard for
JT Types Listed Below
JT/JTG/JTL/JTP
JTS/JTPS/JTLS
JTN/JTPN/JTLN
Indicated Finish Standard for
LJT Types Listed Below
LJT/LJTP
LJTPS/LJTS
LJTN/LJTPN
Hermetic Connectors
Suffix
Material/Finish
Carbon Steel Shell
Tin Plated Shell and Contacts
Carbon Steel Shell
Tin Plated Shell and Gold Plated Contacts
Stainless Steel Shell
Gold Plated Contacts
MS (D)
MS (E)
(162)
JTS( )Y
JTLS( )Y
LJTS( )Y
Military
Proprietary
Indicated Finish Standard for
JT Types Listed Below
JT( )H/JT( )Y
JTL( )H/JTL( )Y
Indicated Finish Standard for
LJT Types Listed Below
LJT( )Y/LJT( )H
3
