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Amphenol JT Series Connectors (MIL-DTL-38999 Series II)

Amphenol JT Series Connectors (MIL-DTL-38999 Series II)

LIGHT-WEIGHT, SPACE-SAVING DESIGN

Amphenol’s JT series MIL-DTL-38999 series II miniature connectors offer high-density contact arrangements in a small size. They were designed for high-performance requirements, including military and commercial aviation applications. These connectors are environmentally-sealed and have a wide operating temperature range. Amphenol’s JT series connectors are intermateable with Souriau and all MIL-DTL-38999 connectors, and were formerly called MIL-C-38999. See our full list of Amphenol JT series features in the specifications below.

Get shopping! Mil spec part number prefixes include MS27472, MS27473, MS27474, MS27484, MS27497, MS27499, MS27500, MS27508 and MS27513.

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FEATURES

AMPHENOL JT SERIES FEATURES

  • High-Reliability
    MIL-DTL-38999 series II - JT style connectors are used in performance aircraft that demand reliable connections in some of the most rigorous environments. The connectors must perform flawlessly under wide temperature ranges, high vibrations, and be resistant to a vast array of contaminants.

  • Low-Profile Connector Design
    JT's require a fraction of the space needed to mate most other high-performance connectors, permitting use in areas that would be impossible for other mating systems.

  • Light-Weight
    Today's aircraft designs require connectors that are very light-weight. Saving weight on the connector systems allows the aircraft to carry more fuel, maximizing its range or payload-carrying capacity.

  • High-Density Connectors
    JT connectors offer up to 128 contacts per connector. Ideally-suited for the demands of today's digital electronics that are used on fly-by wire aircraft, advanced robotics, and critical industrial equipment.

  • Operates at Extreme Temperatures
    = These connectors will operate in temperatures from -85°F to +392°F (-65°C to +200°C)

  • Quick-Mating Coupling Systems
    Three-point bayonet coupling nuts provide fast, one-third-turn connector mating. Mating is easily verified with an audible and tactile "click" and a bayonet pin sighting hole located in the coupling nut.

  • Broad Range of Military and Commercial Accessories
    Many military-standard endbells to MIL-C-85049 specifications and a wide array of cable termination styles are available. Straight, 45- and 90-degree endbells come in many styles from low-cost, standard clamp to shielded, environmentally-sealed.

  • MIL-DTL-38999 Approved
    JT's are fully-intermatable and intermountable with all other MIL-DTL-38999 series II connectors.

MATERIALS & FINISHES

AMPHENOL JT SERIES MATERIALS & FINISHES
Shell
Aluminum alloy
Plating
A - Clear chromate over cadmium over electroless nickel per QQ-P-416
B - Olive drab chromate over cadmium over electroless nickel per QQ-P-416
F - Electroless nickel per QQ-N-290
C - Hard, anodic, non-conductive in accordance with MIL-A-862
W52 - Olive drab zinc cobalt
Contacts
Copper alloy
Plating
Gold-plated, 50 microinches per MIL-G-45204 type II, grade C, class 1
Insulator
Hard dielectric wafer that contains metal retention tines for high-reliability retention of crimp contacts
Grommet & Seals
Silicone-based elastomer
Grounding Springs
Beryllium copper (Grounded plug only)

ELECTRICAL DATA

AMPHENOL JT SERIES ELECTRICAL DATA
Operating Voltage & Test Voltage (unmated condition)

Test
Voltages


N

Service Rating
M


I


II

Sea Level

1000

1300

1800

2300

100,000 Feet

200

200

200

200




Current Rating by Contact Size & Wire Accommodation (Test Amps)

Wire Size

22D

22M*

22*

20

16

12

28

1.5

1.5

-

-

-

-

26

2.0

2.0

2.0

-

-

-

24

3.0

3.0

3.0

3.0

-

-

22

5.0

-

5.0

5.0

-

-

20

-

-

-

7.5

7.5

-

18

-

-

-

-

10.0

-

16

-

-

-

-

13

-

14

-

-

-

-

-

17.0

12

-

-

-

-

-

23.0




Contact Resistance of Mated Contacts End-to-End

Contact Size

Maximum Millivolt Drop

22D

73

22M*

45

22*

73

20

55

16

49

12

42


Insulation Resistance
5,000 megohms minimum


MECHANICAL

AMPHENOL JT SERIES MECHANICAL
Operating Temperature
A - Clear chromate over cadmium over electroless nickel per QQ-P-416
B - Olive drab chromate over cadmium over electroless nickel per QQ-P-416
F - Electroless nickel per QQ-N-290
C - Hard, anodic, non-conductive in accordance with MIL-A-862
W52 - Olive drab zinc cobalt
Sealing
Against sand, dust, per MIL-STD-202 & ice resistance

Wire Sealing Range

Contact Sizes

Minimum Inches

Maximum Inches

Minimum MM

Maximum MM

22D

0.030

0.054

0.76

1.37

22M*

0.030

0.050

0.76

1.27

22*

0.034

0.060

0.60

1.52

20

0.040

0.083

1.02

2.11

16

0.065

0.109

1.65

2.77

12

0.097

0.142

2.46

3.61




Insulation Strip Length

Contact Size

Strip Length

22*, 22D or 22M*

.125 (3.18)

20

.188 (4.77)

16

.188 (4.77)

12

.188 (4.77)


All dimensions in inches (millimeters in parenthesis)

Mating Life
500 cycles minimum: 250 for plug with grounding fingers (JTG06)
Salt Spray
Finish A: 48-hour per MIL-STD-1344A method 1001 condition B
Finish B: 500-hour per MIL-STD-1344A method 1001 condition C
Finish F: 48-hour per MIL-STD-1344A method 1001 condition B
Finish C: 500-hour per MIL-STD-1344A method 1001 condition C
Finish W52: 48-hour
Heat
Finish A: 150°C (302°F)
Finish B: 175°C (347°F)
Finish F: 200°C (392°F) 1000 hours to MIL-STD-1344 method 1005
Finish C: 200°C (392°F)
Finish W52: 175°C (347°F)
Chemical Resistance
Lubricating oils, hydraulic fluids, coolants, deicing fluids per MIL-STD-1344A Method 1016 condition A-1
Sine Vibration
Not applicable
Random Vibration
43.7 grms at ambient temperatures
Shock
300g±15% for 3±1 milliseconds per MIL-DTL-38999L 4.7.23
EMI-Shielding Effectiveness
100 MHz to 10 GHz - minimum attenuation of 45 dB
Contact Type
Crimp, fibre optic, coax, twinax, or printed circuit
Number of Circuits
2 to 128
Contact Insertion
Rear insertion/rear extraction with simple plastic or high-quality metal hand-tools.
Contact Retention
Per MIL-C-38999L tested to MIL-STD-1344A method 2007

Contact

Axial Load Newtons ±10%

Axial Load Pounds ±10%

22*, 22D, 22M*

44

10

20

67

15

16

111

25

12

111

25


* Inactive for new designs

Polarization
Rear insertion/rear extraction with simple plastic or high-quality metal hand-tools.
Approvals
MIL-DTL-38999L


AMPHENOL JT SERIES CROSS-SECTION



AMPHENOL JT SERIES EXCERPT FROM MIL-DTL-38999K

3.43.2 JAN brand. The United States Government has adopted, and is exercising legitimate control over the certification marks “JAN” and “J”, respectively, to indicate that items so marked or identified are manufactured to, and meet all the requirements of military specification. Accordingly, items acquired to, and meeting all of the criteria specified herein and in applicable specifications shall bear the certification mark “JAN” except that items too small to bear the certification mark “JAN” shall bear the letter “J”. The “JAN” or “J” shall be placed immediately before the PIN except that if such location would place a hardship on the manufacturer in connection with such marking, the “JAN” or “J” may be located on the first line above or below the PIN. Items furnished under contracts or orders which either permit or require deviation from the conditions or requirements specified herein or in applicable specifications shall not bear “JAN” or “J”. In the event an item fails to meet the requirements of this specification and the applicable specification sheets or associated detail specifications, the manufacturer shall remove the “JAN” or the “J” from the sample tested and also from all items represented by the sample. The “JAN” or “J” certification mark shall not be used on products acquired to contractor drawings or specification. The United States Government has obtained Certificate of Registration No. 504,860 for the certification mark “JAN”.

Note: The “JAN” or “J” is not part of the PIN but indicates a certification.
 
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