D38999/20FH35PCN | 100-Pin Series III PCB Mount Receptacle (Key N)
The D38999/20FH35PCN is a size 23 MIL-DTL-38999 Series III receptacle with 100 pin PCB contacts. Features “N” polarization and “F” electroless nickel finish for board-level integration.
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D38999/20FH35PCN Seamless Board-to-Cable Interface Architecture
The D38999/20FH35PCN is specifically engineered for specialized electronic grids that require a high-density, permanent transition between external cabling and internal printed circuit boards. By utilizing fixed PC tail contacts, this receptacle allows for direct soldering onto the PCB, which eliminates the need for internal wire harnesses and complex crimp terminations. This architectural choice significantly optimizes the internal spatial footprint of the enclosure and reduces the overall system weight. The Type 20 square flange housing provides a stable four-point mounting interface on the equipment chassis, ensuring that the mechanical stress from mating cycles is absorbed by the metal housing rather than the delicate solder joints on the circuit board.
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 |
High-Density 23-35 Layout for Signal Concentration
Within the robust size 23 aluminum alloy shell, the D38999/20FH35PCN facilitates one hundred independent signal channels through the 23-35 insert arrangement. These channels utilize Size 22D pin contacts, precision-machined and gold-plated to maintain a low-resistance electrical path and superior protection against atmospheric oxidation. This massive channel count allows engineers to consolidate extensive data streams into a single, high-reliability interface, simplifying the cabling complexity of modern avionics and tactical communication hubs. The dielectric insert ensures consistent insulation resistance across all 100 poles, maintaining signal purity even during high-bandwidth data transmission in aggressive electromagnetic environments.
Universal N-Keying and System Compatibility
The “N” designation indicates the use of the normal polarization keyway, which is the most widely adopted indexing configuration within the MIL-DTL-38999 Series III framework. This ensures that the D38999/20FH35PCN maintains maximum intermateability with standard-issue Series III plugs of the same size and layout. The triple-start threaded coupling mechanism provides a self-locking connection that is highly resistant to loosening under severe vibration or mechanical shock. This standardized indexing and locking logic provides an intuitive physical safeguard, ensuring that the D38999/20FH35PCN can be seamlessly integrated into existing global aerospace and defense supply chains with absolute reliability.
Environmental Hardening and "F" Class Shielding
As an “F” class component, the D38999/20FH35PCN is treated with electroless nickel plating, a finish highly valued for its dual-benefit of corrosion resistance and high electrical conductivity. This finish is essential for maintaining an effective Faraday cage around the 100-pole interface, providing superior EMI and RFI shielding to protect internal signals from external interference. To withstand aggressive field conditions, the connector is equipped with high-resilience fluorosilicone interfacial seals. These seals create a moisture-proof and dust-proof barrier, ensuring that the board-level electronics remain isolated from the effects of humidity, salt spray, and the rapid pressure changes typical of high-altitude flight.
Mechanical Security and Scoop-Proof Protection
The structural integrity of the D38999/20FH35PCN is further reinforced by its 100% scoop-proof shell design. This feature ensures that the one hundred pin contacts are recessed deeply enough within the housing to prevent any bending or damage if the mating plug is misaligned during the connection process. This mechanical safeguard is particularly critical for blind-mating scenarios in dense equipment racks where visibility and access are restricted. By combining the precision of PCB mounting with the mechanical security of the Series III interface, the D38999/20FH35PCN delivers a future-proof interconnect solution for the most demanding global industrial and mission-critical applications.
FAQ
What are the advantages of 100-pin PCB contacts in this model?
What are the advantages of 100-pin PCB contacts in this model?
They allow for a massive concentration of signal channels to be directly soldered to a board, saving significant space, reducing assembly time, and enhancing electrical reliability by removing extra wiring.
Is the "N" keying the best choice for general applications?
Is the "N" keying the best choice for general applications?
Yes, the “N” (Normal) keyway is the standard default configuration, offering the highest level of compatibility with the widest range of standard Series III plugs available on the market.
Does the "F" finish provide protection against EMI?
Does the "F" finish provide protection against EMI?
Absolutely. The electroless nickel (F) finish is highly conductive, providing an excellent ground path and effective shielding to protect the 100 signal channels from electromagnetic and radio frequency interference.
Can the D38999/20FH35PCN be used in high-vibration environments?
Can the D38999/20FH35PCN be used in high-vibration environments?
Yes, the triple-start threaded coupling and the four-point square flange mount are specifically designed to maintain mechanical and electrical integrity under the extreme vibration levels of aerospace platforms.
How many contacts are provided in the 23-35 arrangement?
How many contacts are provided in the 23-35 arrangement?
This arrangement provides one hundred individual signal channels using size 22D pin contacts, making it one of the highest density options in the size 23 shell.
Certification
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