D38999/20WA35PLN | Size 9 Series III PCB Receptacle (Normal Keying)
The D38999/20WA35PLN is a compact size 9 MIL-DTL-38999 Series III receptacle featuring 6 pin PCB contacts. Includes “W” olive drab cadmium finish and standard “N” polarization for tactical grids.
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D38999/20WA35PLN Miniaturization and Direct-to-Board Integration
The D38999/20WA35PLN is a high-performance interconnect solution designed for specialized electronic grids where physical space is at a significant premium. As a size 9 shell, it occupies the smallest footprint in the Series III circular connector family, making it an essential component for miniaturized aerospace modules and tactical handheld devices. The integration of fixed PC tail contacts allows the receptacle to be soldered directly onto a printed circuit board, removing the need for internal wire harnesses and manual crimp terminations. This architecture not only reduces the overall weight and volume of the equipment but also enhances signal reliability by eliminating extra wiring interfaces between the external cabling and the internal electronics.
Key Specifications
Shell Material | Voltage Rating | Current Rating | Operating Temp | Ingress Protection | Mating Cycles | Keying & Polarization | Coupling |
|---|---|---|---|---|---|---|---|
Aluminum alloy | ~1000 VAC | ~23 A | -65 °C to +200 °C | IP67 | 500 | N | threaded coupling |
Olive Drab Cadmium Finish and Environmental Shielding
The “W” class designation of the D38999/20WA35PLN indicates a high-strength aluminum alloy housing finished with olive drab cadmium plating. This finish is specifically engineered for aggressive operational environments, providing superior corrosion resistance that can withstand 500 hours of continuous salt spray exposure. Beyond environmental protection, the cadmium coating is highly conductive, ensuring excellent shell-to-shell grounding for effective EMI and RFI shielding. This is critical for preserving the integrity of low-voltage data signals in dense electronic grids. The matte green surface also provides a non-reflective finish, meeting the stealth and aesthetic requirements of modern tactical field gear.
Standard N-Keying and Universal Compatibility
The D38999/20WA35PLN utilizes the standard “N” (Normal) polarization keyway, which is the industry-default indexing configuration for Series III connectors. This ensures maximum intermateability with any standard-issue Series III plug of the same size and layout, facilitating easy integration into global supply chains and military logistics systems. The triple-start threaded coupling mechanism provides a self-locking connection that is inherently resistant to decoupling under severe vibration and shock. This standardized indexing logic provides technicians with a familiar and reliable mating experience, ensuring consistent performance across a wide range of aerospace and defense platforms.
High-Density 09-35 Layout and Contact Precision
Despite its small size 9 shell, the D38999/20WA35PLN features the 09-35 high-density insert arrangement, which facilitates six independent conductive paths. These channels use Size 22D pin contacts, which are precision-machined from copper alloy and finished with high-grade gold plating to maintain a low-resistance electrical path. The gold plating ensures the six pins remain protected against atmospheric oxidation and sulfurization over a long service life. The specialized dielectric material used in the insert provides high insulation resistance between the dense contacts, ensuring clear signal transmission even in high-humidity zones or unpressurized aerospace compartments.
Structural Durability and Square Flange Stability
The structural integrity of the D38999/20WA35PLN is supported by its Type 20 square flange design, which allows for a secure four-point mounting to the equipment chassis. This stable interface ensures that the mechanical forces encountered during the mating of the triple-start threads are absorbed by the metal housing rather than the internal PCB solder points. Furthermore, the 100% scoop-proof shell architecture ensures that the six delicate PCB pins are recessed deeply enough to prevent any damage if the mating plug is misaligned during the connection process. This combination of mechanical robustness and board-level precision makes the D38999/20WA35PLN a future-proof interconnect solution for ruggedized digital grids.
FAQ
What are the benefits of the PCB tails in the D38999/20WA35PLN?
What are the benefits of the PCB tails in the D38999/20WA35PLN?
Fixed PCB tails allow for a direct solder connection to the circuit board, which saves significant internal space, reduces system weight, and eliminates the complexity of internal wire management.
Why is the Olive Drab Cadmium (W) finish used?
Why is the Olive Drab Cadmium (W) finish used?
It provides the highest level of corrosion resistance (500-hour salt spray) and excellent electrical conductivity for grounding, while offering a non-reflective surface for tactical applications.
How many pins does the 09-35 arrangement provide?
How many pins does the 09-35 arrangement provide?
The 09-35 arrangement provides six individual signal channels using high-density Size 22D pin contacts within a compact size 9 shell.
Is the "N" keying compatible with other Series III plugs?
Is the "N" keying compatible with other Series III plugs?
Yes, the “N” keying is the standard universal polarization, meaning it will mate with any standard Series III size 9 plug that also uses the “N” keying and 09-35 layout.
Can this small connector handle high vibration?
Can this small connector handle high vibration?
Absolutely. The self-locking triple-start threads and the four-point square flange mount are specifically designed to maintain mechanical and electrical integrity under the extreme vibration levels of tactical and aerospace platforms.
Certification
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