38999 Series III-Type Fiber-Optic and Hybrid Connectors
Fiber + power + coax + data in one 38999 shell · ≤ 0.6 dB
J599A8 38999 Series III-Type Multi-Fiber Optical Connectors
2 to 32 fibers · ≤ 0.6 dB multimode · ≤ 0.8 dB single-mode
J599A8 carries 2 to 32 optical fibers in a 38999 Series III-type shell with triple-start threaded coupling. Removable crimp termini with ceramic ferrules and alignment sleeves follow ARINC 801, for multimode or single-mode fiber, and the shells are made for marine environments in aluminum, stainless steel or titanium.
- Fibers
- 2 to 32
- Insertion loss
- ≤ 0.6 dB MM / ≤ 0.8 dB SM
- Fiber types
- 9/125, 50/125, 62.5/125, OM3
- Coupling
- Triple-start thread
- Temperature
- −55 to +125 °C
- Mating cycles
- 500
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Key features
- 2, 4, 6, 8, 12, 16, 24 or 32 fiber channels in shell sizes 11 to 25
- Ceramic ferrules and alignment sleeves for precise optical alignment; termini to ARINC 801
- Removable crimp termini; pin termini protected against damage during mating
- Triple-start threaded coupling with anti-decoupling; five key positions, blind mating
- Aluminum, stainless-steel or titanium shells for marine environments
- VAB adjustable-angle backshell: straight, 45° or 90° cable exit with cable clamp
- High channel count in a small, light shell, immune to electromagnetic interference
Specifications
| Parameter | Value | Condition |
|---|---|---|
| Insertion loss, multimode | ≤ 0.6 dB | 62.5/125 µm |
| Insertion loss, single-mode | ≤ 0.8 dB | 9/125 µm |
| Fiber types | Multimode 62.5/125, 50/125, OM3 50/125; single-mode 9/125 | |
| Termini | Ceramic ferrule with alignment sleeve, removable crimp |
| Parameter | Value | Condition |
|---|---|---|
| Coupling | Triple-start thread with anti-decoupling device | |
| Durability | 500 mating cycles | |
| Shock | 490 m/s² | |
| Vibration | 10–2000 Hz, 0.1 g²/Hz |
| Parameter | Value | Condition |
|---|---|---|
| Operating temperature | −55 to +125 °C | |
| Marine environment | Stainless-steel and titanium shells for exposed locations |
GJB 599A Series III (interface) — Shell and coupling to the GJB 599A Series III interface, the Chinese counterpart of MIL-DTL-38999 Series III. ARINC 801 — Fiber-optic termini.
Parameters not listed above — for example vibration level, leak rate or other environmental tests — can be tested to your requirements, including third-party testing.
Fiber count by shell size
| Shell | Code | Fibers | Plug Ø A max (mm) |
|---|---|---|---|
| 11 | B | 2 | 24.9 |
| 13 | C | 4 | 29.3 |
| 15 | D | 6 | 32.3 |
| 17 | E | 8 | 35.6 |
| 19 | F | 12 | 38.4 |
| 21 | G | 16 | 41.5 |
| 23 | H | 24 | 44.8 |
| 25 | J | 32 | 48.2 |
J599A8/20 receptacle dimensions
| Shell | Code | Thread D | E (mm) | F (mm) | G (mm) | H (mm) |
|---|---|---|---|---|---|---|
| 11 | B | M15 × 1-6g | 26.2 | 20.62 | 18.26 | 3.25 |
| 13 | C | M18 × 1-6g | 28.6 | 23.01 | 20.62 | 3.25 |
| 15 | D | M22 × 1-6g | 31 | 24.61 | 23.01 | 3.25 |
| 17 | E | M25 × 1-6g | 33.3 | 26.97 | 24.61 | 3.25 |
| 19 | F | M28 × 1-6g | 36.5 | 29.36 | 26.97 | 3.25 |
| 21 | G | M31 × 1-6g | 39.7 | 31.75 | 29.36 | 3.25 |
| 23 | H | M34 × 1-6g | 42.9 | 34.93 | 31.75 | 3.91 |
| 25 | J | M37 × 1-6g | 46 | 38.1 | 34.93 | 3.91 |
Versions
| Series code | Version | Notes |
|---|---|---|
| J599A8/20 | Square-flange receptacle | |
| J599A8/26 | Plug | |
| VAB | Adjustable-angle backshell | Straight, 45° or 90° exit, anti-rotation, cable clamp |
Shell materials and finishes
| Code | Shell material | Finish | Shell conductivity | EMI shielding | Temperature | Salt spray |
|---|---|---|---|---|---|---|
| W | Aluminum alloy | Olive-drab cadmium | — | — | −55 to +125 °C | For enclosed areas |
| K | Stainless steel | Passivated | — | — | −55 to +125 °C | For exposed areas |
| TA | Titanium alloy | None | — | — | −55 to +125 °C | For exposed areas |
How to order
J599A8/[type] M [finish][shell][fibers][key]-[fiber type]
Example: J599A8/20MKD06N-S — Square-flange receptacle, marine environment, stainless steel, shell 15, 6 fibers, key N, single-mode 9/125
| Code segment | Options |
|---|---|
| Type | |
| Class | |
| Finish | |
| Shell | |
| Fibers | |
| Key | |
| Fiber type |
Termini are not included with the connector and are ordered separately.
Cadmium finish W is not RoHS compliant and is supplied on request.
Typical applications
- Offshore platforms and ships
- Rail communication and video
- Industrial networks in harsh sites
- Rugged test and measurement systems
Frequently asked questions
Are the termini included?
No — termini are ordered separately, so you can choose single-mode or multimode for each connector. Tell us the fiber type and we will list the matching termini.
J599A8 or expanded-beam J599E8?
J599A8 uses physical-contact ceramic ferrules for low insertion loss. J599E8 uses expanded-beam optics that tolerate dirt and are easier to clean in the field. Send your loss budget and environment and we will recommend one.
Related series
J599 Series III Circular Connectors (38999 Series III Type)
38999 Series III type · shell sizes 9–25 · 184 insert arrangements
J599E8 Expanded-Beam Fiber-Optic Connectors (38999 Type)
Expanded beam · ≤ 0.6 dB · 2000 cycles · 38999 shell
From sample to production
Send your requirements
Part number, drawing, pin-out or a short description of your application.
Configuration and quote
Our engineers match the configuration and reply with a drawing and quotation.
Samples
Samples are built to order. The minimum order quantity is 10 pieces, and samples and production orders each take 4–8 weeks. Third-party testing to your specification is available on request.
Your approval
You test the samples in your own equipment and approve them.
Series production
Production follows the approved sample configuration, with machining, molding, plating and assembly in our own Shenyang factory.
Need a quote or a drawing?
Send your part number, pin-out or drawing. Every inquiry is acknowledged by email within 1 business day, and an engineer follows up with a matched configuration, drawing or quotation.
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