MIL-DTL-38999 Series III Square Flange Receptacle Connector D38999/20WH35SN with 35 Positions and 300g Shock Resistance
Price:
10$-150$
MOQ:
100pcs
Delivery Time:
2-9weeks
Brand:
HIGH WOOD
Product Description
MIL-DTL-38999 Series III Connector Overview
The D38999/20WH35SN is a high-performance circular connector compliant with MIL-DTL-38999 Series III specifications, featuring triple-start threaded quick connection with anti-loose mechanism for reliable operation in demanding environments.
Key Features
- Compact design with small size and light weight
- High-density contact configuration with up to 35 positions
- Advanced EMI/RFI shielding with 85dB attenuation at 1GHz
- Removable crimp contacts for easy maintenance
- Anti-oblique mating protection
- Fireproof shell construction
- Multiple coating options for various environmental conditions
- Superior vibration performance: 60g sine, 44.1-49.5 grms random
- High shock resistance: 300g peak acceleration at 3ms
Environmental Durability
Designed to withstand harsh conditions including sandstorms, damp environments, and extreme temperatures with 500-cycle endurance rating.
Material Options
Shell materials available in aluminum alloy, naval brass, stainless steel, or composite materials to suit specific application requirements.
Ordering Information
D38999/ | 20 | W | B | 35 | P | N
20 = Square flange receptacle
W = Olive green cadmium plating
B = Shell size B (11)
35 = 35-position contact layout
P = Crimp pin contacts
N = Normal orientation
W = Olive green cadmium plating
B = Shell size B (11)
35 = 35-position contact layout
P = Crimp pin contacts
N = Normal orientation
Product Images
Shell Dimensions
| Shell No. | A (max) | B (max) | C (max) | D Thread | E | F | G | H | J | d1 (min) | d2 (min) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 09 | 20.90 | 10.60 | 2.50 | M12×1-6g | 23.80 | 18.26 | 15.09 | 3.25 | 5.49 | 16.66 | 13.11 |
| 11 | 20.90 | 10.60 | 2.50 | M15×1-6g | 26.20 | 20.62 | 18.26 | 3.25 | 4.93 | 20.22 | 15.88 |
| 13 | 20.90 | 10.60 | 2.50 | M18×1-6g | 28.60 | 23.01 | 20.62 | 3.25 | 4.93 | 23.42 | 19.05 |
| 15 | 20.90 | 10.60 | 2.50 | M22×1-6g | 31.00 | 24.61 | 23.01 | 3.25 | 4.39 | 26.59 | 23.01 |
| 17 | 20.90 | 10.60 | 2.50 | M25×1-6g | 33.30 | 26.97 | 24.61 | 3.25 | 4.93 | 30.96 | 25.81 |
| 19 | 20.90 | 10.60 | 2.50 | M28×1-6g | 36.50 | 29.36 | 26.97 | 3.25 | 4.93 | 32.94 | 28.98 |
| 21 | 20.10 | 11.40 | 3.20 | M31×1-6g | 39.70 | 31.75 | 29.36 | 3.25 | 4.93 | 36.12 | 32.16 |
| 23 | 20.10 | 11.40 | 3.20 | M34×1-6g | 42.90 | 34.93 | 31.75 | 3.91 | 6.15 | 39.29 | 34.93 |
| 25 | 20.10 | 11.40 | 3.20 | M37×1-6g | 46.00 | 38.10 | 34.93 | 3.91 | 6.15 | 42.47 | 37.69 |
Electrical Specifications
Contact Resistance and Current Rating
| Contact ID | Diameter (mm) | Resistance (mΩ) | Current (A) |
|---|---|---|---|
| 22D# | Φ 0.76 | ≤ 12.0 | 5.0 |
| 20# | Φ 1.00 | ≤ 5.0 | 7.5 |
| 16# | Φ 1.60 | ≤ 2.5 | 13.0 |
| 12# | Φ 2.40 | ≤ 1.5 | 23.0 |
| 10# | Φ 3.15 | ≤ 1.0 | 40.0 |
EMI Shielding Performance
At 1GHz: minimum attenuation 85dB (F and W finishes)
At 10GHz: minimum attenuation 65dB (F finish)
At 10GHz: minimum attenuation 50dB (W finish)
At 10GHz: minimum attenuation 65dB (F finish)
At 10GHz: minimum attenuation 50dB (W finish)
Withstanding Voltage
| Service Rating | M | I | II | N |
|---|---|---|---|---|
| Sea Level | 1300 | 1800 | 2300 | 1000 |
| 21000m | 800 | 1000 | 1000 | 600 |
Insulation Resistance
Normal conditions: ≥ 5000 MΩ
Damp heat conditions: ≥ 100 MΩ
Damp heat conditions: ≥ 100 MΩ
Electrical Continuity Between Shells
W class: ≤ 2.5 mΩ
F class: ≤ 1.0 mΩ
K class: ≤ 5.0 mΩ
F class: ≤ 1.0 mΩ
K class: ≤ 5.0 mΩ
Mechanical Specifications
- Shell materials: Aluminum alloy, stainless steel, or copper-alloy
- Insulator: Thermo-set plastic
- Grommet and seal: Silicon rubber
- Contact material: Copper alloy with gold plating
- Endurance rating: 500 mating cycles
- Vibration resistance: Sine 60g, Random 44.1-49.5 grms
- Shock resistance: 300g peak acceleration at 3ms half sinusoid
Contact Retention Force
22D#: 45N
20#: 67N
16#: 111N
12#: 111N
10#: 111N
8#: 111N
20#: 67N
16#: 111N
12#: 111N
10#: 111N
8#: 111N
Contact Layout Diagrams
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
High Wood Technology Development Co., Ltd
Location
No.5001,Dongji Building B, No.1 Dongji Avenue, Jiangning, Nanjing, China
Contact Person
Mike Huang