D38999/20WH35PLN | 100-Pin Series III PCB Receptacle (Size 23)
The D38999/20WH35PLN is a size 23 MIL-DTL-38999 Series III receptacle with 100 pin PCB contacts. Features “W” olive drab cadmium finish and “N” polarization for ultra-dense grids.
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D38999/20WH35PLN Ultra-High Density Integration for Complex Electronic Grids
The D38999/20WH35PLN represents one of the most capable interconnect solutions for specialized electronic grids requiring massive data consolidation. Utilizing the large size 23 aluminum alloy shell, this receptacle facilitates one hundred independent conductive channels through its 23-35 insert arrangement. The integration of fixed PC tail contacts allows this hundred-pin interface to be mounted and soldered directly onto a multi-layer printed circuit board (PCB). This architecture is critical for centralized mission computers and high-capacity flight data recorders where managing one hundred individual internal wires would be physically impossible or prohibitively heavy. By transitioning directly to the board, the D38999/20WH35PLN streamlines internal cabinet architecture while maximizing signal throughput.
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 |
Tactical Environmental Shielding and Shell Conductivity
The “W” class finish of the D38999/20WH35PLN indicates a high-strength aluminum housing treated with olive drab cadmium plating over an electroless nickel underplate. This multi-layered defense system is specifically engineered for the most aggressive field environments, providing a certified 500-hour salt spray rating. Beyond its superior corrosion resistance, the cadmium finish is highly conductive, ensuring an excellent low-impedance ground path between the shell and the equipment chassis. This conductivity is essential for maintaining effective EMI and RFI shielding, which protects the one hundred internal signal lines from electromagnetic noise in high-density electronic clusters and unpressurized aerospace compartments.
Standard N-Keying and Global System Compatibility
The D38999/20WH35PLN 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 shell size and layout, facilitating easy integration into global aerospace and defense supply chains. The triple-start threaded coupling mechanism provides a self-locking connection that is inherently resistant to loosening under severe harmonic vibration. This standardized indexing logic ensures that the D38999/20WH35PLN delivers a familiar and reliable mating experience for technicians during rapid field maintenance and initial assembly cycles.
Precision Contact Fidelity and 23-35 Layout Integrity
Within the size 23 housing, the D38999/20WH35PLN employs the 23-35 high-density insert arrangement, providing one hundred signal channels using Size 22D pin contacts. These PC tail contacts are precision-machined from copper alloy and finished with high-grade gold plating to maintain a low-resistance interface throughout the equipment’s service life. The gold plating ensures that the contact surfaces remain protected against atmospheric oxidation and sulfurization. Despite the extreme density of the one hundred pins, the high-performance dielectric insert provides superior insulation resistance, ensuring signal purity and preventing crosstalk even in environments subject to rapid pressure changes and high humidity.
Structural Stability and Heavy-Duty Mounting
The structural integrity of the D38999/20WH35PLN is reinforced by its Type 20 square flange design, which allows for a secure and permanent four-point mounting on equipment panels. This stable mounting interface ensures that the mechanical forces encountered during the mating of the triple-start threaded coupling are absorbed by the chassis rather than the delicate PCB solder joints. Furthermore, the 100% scoop-proof shell architecture ensures that the one hundred delicate PCB pins are recessed deeply enough within the housing 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 D38999/20WH35PLN a future-proof interconnect solution for ruggedized digital grids.
FAQ
How many contacts does the D38999/20WH35PLN support?
How many contacts does the D38999/20WH35PLN support?
The 23-35 layout supports one hundred independent signal channels using high-density Size 22D pin contacts, making it ideal for massive data transmission requirements.
What are the benefits of using PC tail contacts in a 100-pin connector?
What are the benefits of using PC tail contacts in a 100-pin connector?
They eliminate the need for 100 individual internal wires, drastically reducing cabinet clutter, assembly time, and total system weight while improving signal consistency.
Does the Olive Drab Cadmium finish provide EMI shielding?
Does the Olive Drab Cadmium finish provide EMI shielding?
Yes, the “W” finish is highly conductive, ensuring a reliable low-impedance ground path between the shell and the chassis for superior electromagnetic interference suppression.
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 for Series III, meaning it will mate with any size 23, 35-layout plug that also uses the standard “N” configuration.
Can this connector handle high-vibration aerospace use?
Can this connector handle high-vibration aerospace use?
Absolutely. The self-locking triple-start threads and the four-point square flange mount are specifically engineered to maintain electrical and mechanical integrity under extreme vibration levels.
Certification
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