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D38999 - KJA
MIL-C-38999 Series III
KJA MIL-C-38999 Series III connectors offer high density contact arrangements in a miniature circular shell. Originally designed for the especially demanding requirements of today's high performance military and commercial aircraft, these connectors are finding their way into applications needing extremely reliable interconnections. KJA's features include, total environmental sealing, wide operating temperature range (-65C up to 200C), quick-mating, triple lead threaded, self-locking coupling, 100% scoop proof shell design, EMI - RFI shielding, and are available in a ruggedized 500 hour salt spray plating.
D38999 - KJA MIL-C-38999 Series III
Applications
* High Performance Military Aircraft * Commercial Airlines * Communications Equipment High Reliability D38999 - KJA 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. Visual confirmation of complete mating is accomplished by the plug coupling nut covering over a red band on the mating shell. Outstanding EMI Shielding Protection These connectors provide excellent signal integrity due to the shielded mating system that utilizes 360 degree shell grounding fingers providing protection of up to 65 dB at 10 GHz. Operates at Extreme Temperatures These connectors will operate in temperatures from -65C up to 200C (-85F up to 392F). High Density Connectors If space and weight are at a premium, KJA connectors offer up to 128 contacts per connector. Ideally suited for the demands of today's digital electronics used on fly-by wire aircraft, advanced robotics, and critical industrial equipment.
* Armored Personnel Carriers & Tanks * Missiles * Shipboard Self-Locking Connector Systems Self-locking coupling nuts and self-locking endbell accessory hardware provide the best performance for threaded connectors in high vibration applications. Broad Range of Military and Commercial Accessories Many military standard endbells to M85049 specifications and a wide array of cable termination style are available. Straight, 45 and 90 degree endbells come in many styles from low cost standard clamp to shielded environmentally sealed and everything in between. Contacts Protection KJA connectors are designed to be scoop proof. Pin contacts are recessed to prevent contact damage and contact shorting from happening when connector halves are put together while mating. Contact Retention Clips KJA's utilize all metal contact retention tines (unlike some 38999 manufacturers that use plastic) which assure the highest level of serviceability and unparalleled contact retention. MIL-C-38999 approved KJA's are fully intermatable and intermountable with all other manufacturer's MIL-C38999 Series III connectors.
Features
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KJA 1
For technical assistance, price or delivery info. call 1-800-523-0727 or visit www.pei-genesis.com
Specifications subject to change.
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Technical Specifications
MATERIALS & FINISHES Shell Platings Contacts Plating Insulator Grommet & Seals Aluminum alloy W - Olive drab chromate over cadmium over electroless nickel per QQ-P-416 F - Electroless Nickel per QQ-N-290 Copper alloy Gold plate, 50 microinches per MIL-G-45204 type II, grade C, class 1 Hard plastic wafer which contains metal retention tines for high reliability retention of crimp contacts Silicone based elastomer
Grounding Springs Beryllium copper (Grounded Plug Only)
ELECTRICAL DATA Contact Sizes 22D, 20, 16 and 12 Operating Voltage & Test Voltage (Unmated Condition)
Service Rating Test Voltages N M I II
Sea Level 100,000 feet
1000 200
1300 200
Wire Size
1800 200
22D 20
2300 200
16 12
D38999 - KJA MIL-C-38999 Series III
Current Rating by contact size and wire accommodation (Test Amps)
28 26 24 22 20 18 16 14 12
1.5 2.0 3.0 5.0 -
3.0 5.0 7.5 -
7.5 10.0 13.0 -
17.0 23.0
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Contact Resistance of mated contacts end to end
Contact Size Maximum Millivolt Drop
22D 20 16 12
40 35 25 25
Insulation Resistance
5,000 megohms minimum
MECHANICAL Operating Temperature Sealing Wire Sealing Range
Contact Size
W plating -65C to 175C (-85F to 347F) F plating -65C to 200C (-85F to 392F) Against sand, dust per MIL-STD-202 & ice resistance
Minimum inches
Maximum inches
Minimum mm
Maximum mm
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2
22D 20 16 12 8
.030 .040 .065 .097 .135
.054 .083 .109 .142 .155
0.76 1.02 1.65 2.46 3.43
1.37 2.11 2.77 3.61 3.74
Specifications subject to change.
For technical assistance, price or delivery info. call 1-800-523-0727 or visit www.pei-genesis.com
Technical Specifications
Insulation Strip Length
Contact Size
Strip Length inch (mm)
22D 20 16 12
.125 (3.18) .188 (4.77) .188 (4.77) .188 (4.77)
Mating Life Salt Spray
500 cycles minimum Finish W: 500 hour per MIL-STD-1344A method 1001 condition C Finish F: 48 hour per MIL-STD-1344A method 1001 condition B Temperature Durability Finish W 175C (347F), Finish F 200C (392F), mated, wired test period 1000 hours to MIL-STD-1344 Method 1005 Chemical Resistance Sine Vibration Random Vibration Shock EMI Shielding Effectiveness Contact Type Number of Circuits Contact Insertion Lubricating oils, hydraulic fluids, coolants, deicing fluids per MIL-STD-1344A Method 1016 condition a - l 60g at -65C to + 200C (-85F to +392F) ambient temperature with simulated accessory load 49.5 grms at ambient temperatures 300 grms 100 MHz to 10 GHz - minimum attenuation of 50 dB
D38999 - KJA MIL-C-38999 Series III
Crimp, fiber optic, coax, twinax, or printed circuit 3 to 128 Insertion from rear of connector with simple plastic or high quality metal hand tool. Extraction from rear with simple plastic or high quality metal hand tools Per MIL-C-38999 J tested to MIL-STD-1344A method 2007
Contact Axial load Newtons +/-10% Axial load Pounds +/-10%
Contact Retention
22D 20 16 12
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44 67 112 111
10 15 25 25
Polarization Approvals
Five keyways with optional minor keyways rotation (Note insert and main keyway remain fixed) MIL-C-38999
Cross Section
KJA 3
For technical assistance, price or delivery info. call 1-800-523-0727 or visit www.pei-genesis.com
Specifications subject to change.
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How to Order
STEP 1
Choose Shell Style
STEP 2
Choose Finish
F
= Electroless Nickel OR
D38999/20 KJA0T Flanged Receptacle
KJA0 and KJA7 mate with KJA6
W = Olive Drab Chromate over Cadmium over Electroless Nickel
D38999/26 KJA6T Cable Plug
Available with PC pins. Call for more details.
STEP 7
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Example: Military
D38999/20
F 2
Finish
A35 3
Layout
1
Shell Style
Example: KJA0T Commercial 1
Shell Style
9 3A
Layout 1st #
F 2
Plating
Note: To develop KJA part # Step 3 is divided into 3A and 3B. 3A (Shell size) precedes Step 2 (Plating Designation) followed by 3B, last part of layout # (Omit the dash)
Legend for charts: Dark Blue Type = Military Part number only Black Type/Light Blue Field = Commercial Part number only
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4
Order by numbers in blue, all other numbers are for assistance in selecting the proper part #.
Dark Blue Type/Light Blue Field = Military & Commercial Part number Grey Field = General information only
Specifications subject to change.
For technical assistance, price or delivery info. call 1-800-523-0727 or visit www.pei-genesis.com
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D38999/24 KJA7T Jam Nut Receptacle
Create Part # by using these 6 steps
P
N
4
Contact
5
Rotation
35 3B
Layout 2nd #
P
N
4
Contact
5
Rotation
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D38999 - KJA MIL-C-38999 Series III
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L/C
6
Modifier
L/C
6
Modifier
How to Order
STEP 3
Choose Layout
(Listed by Shell Size)
STEP 4
Choose Contact
D38999 Layout A35 A98 B35 B5 B98 C35 C8 C98 D15 D18 D19 D35 D5 D97 E26 E35 E6 E8 F11 F32 F35 G11 G16 G35 G39 G41 G75 H21 H35 H53 J19 J20 J24 J29 J35 J37 J4 J42 J43 J46 J61 J64 J66 J8
H55 23-55 www..com 25-19 25-20 25-24 25-29 25-35 25-37 25-4 25-42 25-43 25-46 25-61 25-64 25-66 25-8
Note: when ordering KJAs, see Commercial
example STEP 7
Step 3A Shell Size
*COAX
For technical assistance, price or delivery info. call 1-800-523-0727 or visit www.pei-genesis.com
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For listing by # of contacts, see page KJA 6.
Commercial
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Military
KJA Layout 9-35 9-98 11-35 11-5 11-98 13-35 13-8 13-98 15-15 15-18 15-19 15-35 15-5 15-97 17-26 17-35 17-6 17-8 19-11 19-32 19-35 21-11 21-16 21-35 21-39 21-41 21-75 23-21 23-35 23-53
Service Rating
See Chart on Page KJA2
Contacts
Total Number 6 3 13 5 6 22 8 10 15 18 19 37 5 12 26 55 6 8 11 32 66 11 16 79 39 41 4 21 100 53 55 19 30 24 29 128 37 56 42 43 46 61 64 66 8
P = Pin S = Socket
Note: See Step 6 if you are not ordering contacts with part.
22D 20 16 12 6 3 13 5 6 22 8 10 14 1 18 19 37 5 8 26 55 6 8 11 32 66 11 16 79 37 2 41 4
8
M I M I I M I I I I I M II I I M I II II I M M II M I I M II M I I I I*** I I M I I I I I I I I M***
A = Less Pin Contacts B = Less Socket Contacts
Use only for special contact types (PC Pin, Thermocouple, Fiberoptic).
STEP 5
Choose Rotation
Shell Size
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9
4**
N = Normal (Standard) A = Next Most popular B = Not popular, limited availability C= D= Check for availability E=
AR & AP Minor Key Locations BR & CR & DR & BP CP DP
D38999 - KJA MIL-C-38999 Series III
21 100 53 55 19 10 13 4* 3** 12 12 29 128 37 48 8 38 23 20 40 4 61 40 53 8 10 6 2 11 8*** 2* 4*
11 13 15
17 19
21 23 25
N A B C D E N A B C D E N A B C D E N A B C D E
105 102 80 35 64 91 95 113 90 53 119 51 80 135 49 66 62 79 80 135 49 66 62 79
140 132 118 140 155 131 141 156 145 156 146 141 142 170 169 140 145 153 142 170 169 140 145 153
215 248 230 205 234 197 208 182 195 220 176 184 196 200 200 200 180 197 196 200 200 200 180 197
265 320 312 275 304 240 236 292 252 255 298 242 293 310 244 257 280 272 293 310 244 257 280 272
Receptacle
Plug
STEP 6
Modifier
For other commercial modification, i.e., less tools, with PC contact or with endbell, call.
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9-35
Step 2 Step 3B Plating Layout Replaces Dash **Twinax ***COAX/Twinax Call for more information
Omit for standard contacts L/C = for use with standard contacts, but supplied without contacts, seal plugs or tools (P .O. must state Less Contacts)
Note: L/C is not marked on part
Specifications subject to change.
KJA 5
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