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GJB599 Series I plug and square-flange receptacle with contacts and backshell
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GJB 599 Series I marine-environment receptacle and plug

GJB599 Series I Bayonet Circular Connectors (38999 Series I Type)

38999 Series I type · bayonet coupling · 127 insert arrangements

GJB599 Series I is our 38999 Series I-type circular connector with fast bayonet coupling. It is built to GJB 599A Series I, with shell sizes 9 to 25, 127 insert arrangements, crimp, solder and PCB contacts, and hermetic receptacles.

Coupling
Bayonet
Shell sizes
9 to 25
Insert arrangements
127
Contact sizes
22D to 10 (5–33 A)
Temperature
−65 to +200 °C
Mating cycles
500

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Key features

  • Bayonet coupling for fast mating and unmating
  • Built to GJB 599A Series I, the Chinese counterpart of MIL-DTL-38999 Series I
  • Removable crimp contacts (except hermetic), plus solder-cup and PCB contacts
  • Receptacles for wall mounting, box mounting (front or rear), jam-nut and round-flange mounting
  • Hermetic receptacles and bulkhead feed-through receptacles, leak rate ≤ 1 × 10⁻⁸ Pa·m³/s
  • Interfacial seal and wire grommet; five key positions; accepts GJB 1784 backshells
  • Fluorosilicone (oil-resistant) seals and thermocouple contacts on request
  • Marine-environment (M) version in stainless steel or titanium for exposed marine locations

Specifications

Electrical
ParameterValueCondition
Dielectric withstanding voltage, service rating M1300 Vrms / 800 VrmsSea level / 21,336 m altitude, mated
Dielectric withstanding voltage, service rating N1000 Vrms / 600 VrmsSea level / 21,336 m altitude, mated
Dielectric withstanding voltage, service rating I1800 Vrms / 1000 VrmsSea level / 21,336 m altitude, mated
Dielectric withstanding voltage, service rating II2300 Vrms / 1000 VrmsSea level / 21,336 m altitude, mated
Insulation resistance≥ 5000 MΩRoom temperature
Insulation resistance≥ 1000 MΩ / ≥ 200 MΩHigh temperature, non-hermetic / hermetic
Insulation resistance≥ 100 MΩAfter humidity
Shell-to-shell conductivity1–50 mΩDepends on finish — see finish table
EMI shielding50 dB at 10 GHzAluminum shells
Mechanical
ParameterValueCondition
CouplingBayonet
Durability500 mating cycles
Shock300 g, half-sine, 3 ms
Environmental
ParameterValueCondition
Operating temperature−65 to +200 °C−65 to +175 °C for cadmium finish
Sine vibration10–2000 Hz, 30 g (100–2000 Hz), 3 × 4 h
Random vibration50–2000 Hz, 1 g²/Hz (100–2000 Hz)2 × 8 h non-hermetic; 2 × 4 h hermetic
Random vibration25–2000 Hz, 5 g²/Hz (100–300 Hz), 2 × 8 h
Damp heat, cyclic10 cycles × 24 hGJB 1217, method 1002, type II
Hermetic receptacle leak rate≤ 1 × 10⁻⁸ Pa·m³/s0.1 MPa pressure differential
Operating altitude≤ 30,480 m
Mould resistanceGrade 2, 28 daysGJB 150

GJB 599A Series I — Chinese specification for Series I bayonet circular connectors, the counterpart of MIL-DTL-38999 Series I.

Values not listed above — for example vibration level, leak rate or other environmental tests — can be tested to your requirements, including third-party testing. Specifications are subject to change; contact us for the current datasheet.

Versions

Series codeVersionNotes
JY27467TPlug-U suffix for the reverse-side plug used with feed-through receptacles
JY27466TWall-mount square-flange receptacle, front mounting
JY27656TWall-mount square-flange receptacle, rear mounting
JY27496EBox-mount square-flange receptacle, front mounting
JY27505EBox-mount square-flange receptacle, rear mounting
JY27468TJam-nut receptacle
JY27901TRound-flange adapter receptacle
JY27469Y / 27470Y / 27471YHermetic receptacles: wall mount / jam nut / solder mount
JY27468Y, JY27466Y …CHermetic bulkhead feed-through receptaclesMate with a standard plug on one side and a -U plug on the other
JY27…MMarine-environment version (M)Stainless (E) or titanium (TA) shells for exposed decks and harsh semi-sealed areas; rated for acid salt spray, acid atmosphere and mould. Example: JY27467T17MTA35PN.

Shell materials and finishes

CodeShell materialFinishShell conductivityEMI shieldingTemperatureSalt spray
FAluminum alloyElectroless nickel1 mΩ50 dB at 10 GHz−65 to +200 °C48 h
BAluminum alloyOlive-drab cadmium2.5 mΩ50 dB at 10 GHz−65 to +175 °C500 h
E, K1Stainless steelPassivated50 mΩ—−65 to +200 °C500 h
NStainless steel (hermetic)Nickel1 mΩ—−65 to +200 °C48 h
TATitanium alloyNone (bare titanium)10 mΩ65 dB at 10 GHz−65 to +200 °CAcid salt spray rated (marine version)

Contact sizes and current ratings

Contact sizeEngaging diameterContact resistanceContact resistance (hermetic)Current ratingWire size
22D0.76 mm≤ 14.6 mΩ≤ 28 mΩ5 AAWG 22–26 (0.13–0.33 mm²)
220.76 mmTested to your requirements—5 AAWG 22–26
201.02 mm≤ 7.3 mΩ≤ 12.0 mΩ7.5 AAWG 20–24 (0.20–0.52 mm²)
161.58 mm≤ 3.7 mΩ≤ 8.5 mΩ13 AAWG 16–20 (0.52–1.31 mm²)
122.41 mm≤ 1.83 mΩ≤ 5 mΩ23 AAWG 12–14 (2.08–3.31 mm²)
103.20 mm≤ 1 mΩ—33 AAWG 10 (5.26 mm²)
8 twinax—Tested to your requirements—Signal (twinax)Twinax cable to your requirements

How to order

JY [type] [class] [shell] [finish] [arrangement] [contact] [key] [suffix]

Example: JY27505E15F35SN — Box-mount rear-mounting receptacle, no backshell thread, shell 15, aluminum with nickel, arrangement 15-35, crimp socket contacts, key N

Code segmentOptions
Type
  • 27467 Plug
  • 27466 / 27656 Wall-mount square-flange receptacle, front / rear mounting
  • 27496 / 27505 Box-mount square-flange receptacle, front / rear mounting
  • 27468 Jam-nut receptacle
  • 27901 Round-flange adapter receptacle
  • 27469 / 27470 / 27471 Hermetic receptacle: wall mount / jam nut / solder mount
Class
  • T Rear thread for backshells
  • E No rear thread (box-mount receptacles)
  • Y Hermetic
Shell
  • 09 – 25 9, 11, 13, 15, 17, 19, 21, 23, 25
Finish
  • F / B Aluminum — electroless nickel / olive-drab cadmium
  • E, K1 / W1 Stainless steel — passivated / cadmium
  • N / E Hermetic — nickel / electropolished
Arrangement
  • e.g. 35 See the insert arrangement table below
Contact
  • P / S Pin / socket
  • PC, PL / SC, SL PCB pin / socket, short or long tail
  • C Feed-through pin (hermetic feed-through)
Key
  • N Normal
  • A B C D Alternate (shell 9: N, A, D only)
Suffix
  • H Solder-cup contacts
  • V Fluorosilicone seals (oil resistant)
  • -U Reverse-side plug for feed-through receptacles
  • Rn n pairs of thermocouple contacts (chromel / alumel)

Hermetic receptacles do not use layouts with coax, shielded or twinax contacts.

Protective caps JY27501 (plug) and JY27502 (receptacle) are ordered separately.

Insert arrangements

127 standard layouts, viewed from the mating face of the pin insert. The arrangement number is written as shell size – layout (for example 25-35). The service rating sets the withstanding voltage (see specifications).

127 layouts

ArrangementContactsContact sizesService rating
9-0333 × size 20I
9-3566 × size 22DM
9-4444 × size 22M
9-9833 × size 20I
11-0222 × size 16I
11-0444 × size 20I
11-0555 × size 20I
11-08a84 × size 20, 4 × size 22DM
11-351313 × size 22DM
11-9866 × size 20I
11-9977 × size 20I
13-0333 × size 16II
13-0444 × size 16I
13-0662 × size 12, 4 × size 20M
13-06A62 × size 16, 4 × size 20M
13-0888 × size 20I
13-08A84 × size 16, 4 × size 20M
13-12121 × size 12 coax, 11 × size 22DM
13-12A1212 × size 20N
13-16163 × size 16, 13 × size 22DN
13-352222 × size 22DM
13-981010 × size 20I
15-0332 × size 12, 1 × size 16I
15-04A44 × size 12M
15-4B44 × size 12 coaxN
15-0555 × size 16II
15-06A66 × size 16M
15-13134 × size 16, 2 × size 20, 7 × size 22DM
15-14146 × size 16, 8 × size 22DN
15-15151 × size 16, 14 × size 20I
15-181818 × size 20I
15-191919 × size 20I
15-23233 × size 16, 2 × size 20, 18 × size 22DM
15-32329 × size 20, 23 × size 22DM
15-353737 × size 22DM
15-97124 × size 16, 8 × size 20I
17-02391 × size 8 twinax, 38 × size 22DM
17-0666 × size 12I
17-06C64 × size 12, 2 × size 22I
17-0888 × size 16II
17-14142 × size 12, 4 × size 16, 8 × size 20M
17-15155 × size 12 coax, 10 × size 22DM
17-19194 × size 16, 11 × size 20, 4 × size 22DM
17-20204 × size 12, 16 × size 22DM
17-262626 × size 20I
17-28A283 × size 12, 25 × size 22DM
17-3063 × size 10, 3 × size 20N
17-355555 × size 22DM
17-424242 × size 22M
17-7522 × size 8 twinaxN
17-99232 × size 16, 21 × size 20I
19-06A63 × size 12 coax, 3 × size 16N
19-111111 × size 16II
19-13138 × size 12, 5 × size 20I
19-17172 × size 12, 15 × size 20M
19-18184 × size 8 twinax, 14 × size 22DM
19-18A184 × size 12 coax, 14 × size 22DM
19-20208 × size 16, 4 × size 20, 8 × size 22DM
19-22227 × size 12, 15 × size 22DM
19-28282 × size 16, 26 × size 20I
19-30301 × size 16, 29 × size 20I
19-323232 × size 20I
19-356666 × size 22DM
19-456767 × size 22DM
19-535353 × size 22M
19-8288 × size 12 coaxI
19-9699 × size 12I
21-10A1010 × size 12 coaxII
21-111111 × size 12I
21-13132 × size 10, 7 × size 12, 4 × size 20M
21-161616 × size 16II
21-242424 × size 20I
21-252525 × size 20I
21-272727 × size 20I
21-28283 × size 10, 25 × size 22DI
21-357979 × size 22DM
21-35A682 × size 12 coax, 66 × size 22DM
21-39392 × size 16, 37 × size 20I
21-39A392 × size 8 twinax, 4 × size 16, 33 × size 22DM
21-414141 × size 20I
21-61616 × size 16, 55 × size 22DM
21-7544 × size 8 twinaxN
21-75A44 × size 12I
23-028585 × size 22M
23-06H66 × size 10II
23-141414 × size 12I
23-212121 × size 16II
23-26268 × size 12, 18 × size 20M
23-323232 × size 20I
23-343434 × size 20I
23-34A344 × size 12, 16 × size 16, 14 × size 22DM
23-35100100 × size 22DM
23-363636 × size 20I
23-44a442 × size 10, 4 × size 12, 38 × size 22DM
23-535353 × size 20I
23-555555 × size 20I
23-707010 × size 20, 60 × size 22DM
23-72722 × size 8 twinax, 70 × size 22DM
23-868616 × size 20, 70 × size 22DM
23-971616 × size 16I
23-991111 × size 16II
25-02100100 × size 22M
25-04568 × size 16, 48 × size 20I
25-07992 × size 8 twinax, 97 × size 22DM
25-0888 × size 8 twinaxN
25-10106 × size 10, 4 × size 12N
25-11119 × size 10, 2 × size 20N
25-191919 × size 12I
25-20303 × size 8 twinax, 1 × size 12 coax, 3 × size 12 shielded, 13 × size 16, 10 × size 20N
25-242412 × size 12, 12 × size 16I
25-292929 × size 16I
25-31312 × size 8 twinax, 5 × size 10, 12 × size 16, 12 × size 20M
25-32326 × size 10, 10 × size 16, 16 × size 20M
25-35128128 × size 22DM
25-35A3511 × size 12 coax, 24 × size 20M
25-36362 × size 8 twinax, 4 × size 10, 8 × size 16, 22 × size 20N
25-39392 × size 12, 17 × size 16, 20 × size 20M
25-434320 × size 16, 23 × size 20I
25-45458 × size 12, 37 × size 20M
25-46462 × size 8 twinax, 4 × size 16, 40 × size 20I
25-616161 × size 20I
25-64a648 × size 16, 40 × size 20, 16 × size 22DM
25-696910 × size 16, 15 × size 20, 44 × size 22DM
25-92924 × size 20, 88 × size 22DM
25-931188 × size 16, 110 × size 22DM
25-94944 × size 12 coax, 8 × size 16, 82 × size 22DM
25-118G1188 × size 16, 110 × size 22DN

Typical applications

  • Rail and transit rolling stock
  • Industrial automation and robotics
  • Test and measurement systems
  • Energy and power equipment
  • Marine and offshore electronics

Frequently asked questions

What is the difference between 38999 Series I and Series III?

Series I uses bayonet coupling for fast mating; Series III uses a triple-start threaded coupling that is self-locking under heavy vibration. Both use the same style of insert arrangements numbered by shell size and layout, for example 25-35.

Can GJB599 Series I replace my MS27467 or D38999/26 Series I parts?

GJB599 Series I is built to GJB 599A Series I, the counterpart of MIL-DTL-38999 Series I. Send us your D38999 part number and we will propose the matching configuration and samples for your mating test.

Do you make hermetic Series I receptacles?

Yes — wall-mount, jam-nut and solder-mount hermetic receptacles, plus bulkhead feed-through receptacles, with leak rate ≤ 1 × 10⁻⁸ Pa·m³/s at 0.1 MPa.

Selection guides

From sample to production

  1. Send your requirement

    Part number, drawing, pin-out or a short description of your application.

  2. Configuration and quote

    Our engineers match the configuration and reply with a drawing and quotation.

  3. Samples

    Samples are made to your order. Third-party testing to your specification is available on request.

  4. Your approval

    You test the samples in your own equipment and approve them.

  5. Series production

    Production follows the approved sample configuration.

Need a quote or a drawing?

Send your part number, pin-out or drawing. An engineer will reply by email.

Request a quote

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