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Custom MIL-DTL-38999 Series I Electrical Connectors

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MIL-DTL-38999 Series I Electrical Connectors Manufacturers

Product introduction

● Comply with GJB599B (MIL-DTL-38999M) I series standards.

● Bayonet type quick connection, which has the advantages of small size, light weight and high contact couple density.

● EMI/RFI shielding.

● Five-key guide mechanism enables blind insertion and mis-insertion prevention.

● Sockets are available in box type, wall type, front-mounted, rear-mounted and nut-fastened installation, etc.
The contact piece is removable for crimping and is designed to prevent oblique insertion.

● 9 types of shell numbers, multiple hole contact arrangements.

● Resistant to high-intensity vibrations.

● The outer shell can be made of different materials and coatings to adapt to different environmental requirements.

● The mating surface and tail have a sealed structure and have excellent three-proof performance.

● Standard tail attachment in compliance with GJB1784.

Usage: The product is used for circuit signal connection.

Usage environment: The product is used in complex environments such as strong vibration, wind, sand and moisture.

Main technical performance

● Mechanical properties:

Material: Shell: aluminum alloy, stainless steel, titanium alloy

Insulator: Thermoset or Thermoplastic

Sealing body and sealing ring: silicone rubber

Coating: Type B: Cadmium plated military green

Class E: Stainless steel passivated

Category F: Electroless Nickel Plating

Class FT: Aluminum alloy satin cadmium plated

TA type: titanium alloy

Contact parts: copper alloy surface gold-plated, available in crimp type, welding type and printed version.

Mechanical life: ≥500 plug and unplug cycles

vibration:

Sinusoidal vibration frequency 10～2000Hz acceleration 294m/s²

Random vibration frequency 100 ~ 1000Hz power spectral density 1g²/Hz

Shock: 3ms half sine wave, acceleration peak 300g

 

● Electrical performance:

Contact resistance and rated current of contacts

Contact specifications

Working diamete mm

Contact resistance mΩ

Rated current A

22D

Ф0.76

≤12

5

20#

Ф1.00

≤5

7.5

16#

Ф1.60

≤2.5

13

12#

Ф2.40

≤1.5

23

10#

Ф3.15

≤1.0

40

Electromagnetic interference shielding: minimum attenuation is 85dB at 100MHz~1GHz

At 1GHz ~ 10GHz, the minimum attenuation is 50dB

 

Withstand voltage: V (Note: Different contact arrangements have different working levels. Please refer to the letters in the upper right corner of the contact arrangement diagram for specific working levels)

Working grade *

M

N

I

II

Sea ​​level

1300

1000

1800

2300

21000m

800

600

1000

1000

Insulation resistance: ≥5000MΩ under normal conditions, ≥100MΩ under humid conditions

 

Electrical continuity between enclosures:

Class B≤2.5mV

Class F, FT≤1.0mV

E, TA category ≤50mV

 

● Environmental performance:

Temperature range: Class B: -65 ˚C ~ +175 ˚C

Category E, F: -65 ˚C ~ +200 ˚C

Salt spray resistance: Category B: 500h

E, TA category: 1000h

Category F: 48h/96h

FT Class: 96h

Relative humidity: 98% at 40 ˚C

Working height: ≤30480m

 

● Other properties: The electrical connector also has good properties such as moisture resistance, salt spray resistance, mold resistance, sand and dust resistance, etc.

Contact arrangement (view of the insertion surface of the needle insulator)

Note:
1. 20 # hole can be replaced with 20 # fiber optic contact piece;
2. 16 # hole can be replaced with 16 # shielding and 16 # fiber optic contacts;
3. The 12 # hole can be replaced with 12 # shielding, 12 # coaxial, and 12 # fiber optic contacts;
4. The 8 # hole can be replaced with 8 # dual coaxial, 8 # single coaxial, and 8 # differential contacts.



ABOUT US

Power-efficient electrical connectors.

Taizhou Henglian Electric Co., Ltd. was founded in April 2011, is located in the "Ginkgo town" reputation of the riverside city - Taixing City, is specialized in electrical connector development, production, sales of high-tech enterprises.

We are China Custom MIL-DTL-38999 Series I Electrical Connectors Manufacturers and OEM/ODM MIL-DTL-38999 Series I Electrical Connectors Suppliers.

There are more than 150 employees, including more than 30 people with various professional and technical titles, fixed assets of 30 million yuan, with a variety of mechanical processing equipment and testing equipment.

In recent years, the company has been rated as "Top Ten enterprises in Zhangqiao Town", "Top Ten enterprises in Zhangqiao Town", and won the "Taixing Outstanding Contribution Award" and other titles.

At present, the company's leading products are conforming to the military standard Y11, Y17, Y27, Y50, YGD, YLH, YM, YW, J599I, J599II, J599III, XC series circular electrical connectors, and J7, J14, J20J, J29A, J30J, J63A series rectangular electrical connectors. It is in line with the national standard Y2, Y4, YP, LYP, YD, and other series of circular electric connectors. The products cover the general staff, final assembly, sea installation, Second Artillery, weapons, aerospace and other military varieties nuclear energy, railway, national power grid, oil earth geophysical exploration, and other fields. The company has a technical center, and quality inspection center, with sophisticated production equipment, modern inspection facilities, and inspection and testing means. The products have the characteristics of three-defense function, high density, high reliability, electronic compatibility, etc., and can develop and produce various kinds of special electrical connectors for various users to meet customer needs.

The company is a qualified supplier of military electronic components, Marine equipment and aerospace of the Communications Department of the General Staff and the Ministry of Information Industry, and has passed the GJB9001C-2017 weapons and equipment quality management system certification and the second-level secret certification of weapons and equipment production and research units.

The company always adhere to the "integrity-based, unity and hard work, realistic innovation, the pursuit of excellence" spirit of enterprise, adhere to the concept of "brand create value", dedicated to customer service, so that Henglian quickly become the leader in the peer.

Taizhou Henglian Electric Co., Ltd. sincerely welcome domestic and foreign customers to visit and negotiate business!

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MIL-DTL-38999 Series I Connector: Structure and Design Features Analysis

Overview

MIL-DTL-38999 Series I connectors are high-performance circular electrical connectors widely used in military and aerospace applications, known for their high density, reliability, and excellent environmental adaptability. Taizhou Henglian Electric Co., Ltd., founded in 2011, specializes in high-end electrical connector development, production, and sales, with extensive experience and advanced manufacturing equipment, capable of producing connectors that meet MIL-DTL-38999 Series I standards.

1. Structural Features

1.1 Plug and Receptacle Design

Series I connectors use a military-standard circular plug and receptacle design with a robust shell featuring three-defense capabilities against dust, water, and corrosion. Taizhou Henglian Electric Co., Ltd. offers aluminum, aluminum-copper alloy, and stainless steel shell options to suit different environments.

1.2 Contact Layout

Supports multiple contact arrangements, with pins and sockets made of high-conductivity alloys, ensuring low contact resistance and high reliability. The high-density design accommodates more circuits in the same size, meeting the needs of aerospace and military equipment for multi-signal and high-power transmission.

1.3 Locking Mechanism

Uses threaded or bayonet locking mechanisms to ensure secure connections and prevent vibration-induced disconnection. Taizhou Henglian Electric Co., Ltd. provides various locking options for ease of operation and safety.

1.4 Sealing and Environmental Adaptability

Equipped with multi-level seals to achieve IP67 or higher protection ratings. Can operate reliably under high temperature, low temperature, salt fog, and humid conditions, meeting the demanding requirements of naval and aerospace applications.

2. Design Features

Feature MIL-DTL-38999 Series I Standard Taizhou Henglian Electric Co., Ltd. Product Advantage
Electrical Performance High current carrying capacity, low contact resistance Customizable current rating up to 23A/pin, supporting both signal and power transmission
Environmental Protection IP67 protection, corrosion-resistant Three-defense function, tested for maritime, desert, and extreme cold environments
Reliability >500 mating cycles 500-1000 mating cycles, meeting military and aerospace standards
Density Design High-density pin arrangement Up to 128 pins per connector possible
EMC Compatibility Designed to resist electromagnetic interference Products pass EMC testing, suitable for nuclear, communication, and aerospace applications
Special Customization Supports multiple configurations Can develop non-standard connectors based on customer requirements

3. Advantages of Taizhou Henglian Electric Co., Ltd.

  • Over 150 employees, including more than 30 technical experts, providing strong technical capability.
  • Equipped with modern machining and inspection equipment, complete technical and quality inspection centers.
  • Main product series include circular connectors Y11, Y17, Y27, Y50, YGD, YLH, YM, YW, J599 series, and rectangular connectors J7, J14, J20J, J29A, J30J, J63A.
  • Products widely used in aerospace, military, nuclear energy, railway, oil field exploration, and other high-demand fields.
  • Certified with GJB9001C-2017 weapons and equipment quality management system and level-2 confidentiality certification, qualified as a military-grade supplier.
  • Products feature high reliability, high density, good electronic compatibility, and can be customized for special connectors according to customer needs.

4. Conclusion

MIL-DTL-38999 Series I connectors are chosen for military, aerospace, and high-end industrial applications due to their high density, reliability, and environmental adaptability. Taizhou Henglian Electric Co., Ltd., with advanced technology and comprehensive production and testing systems, can provide both standard and customized connectors, fully meeting the requirements of complex operating environments.

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