D38999/20FF11PCN | 11-Pin Series III PCB Mount Receptacle (Key N)
The D38999/20FF11PCN is a MIL-DTL-38999 Series III square flange receptacle with 11 pin PCB contacts. Features a size 19 shell, “F” electroless nickel finish, and standard “N” polarization.
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D38999/20FF11PCN Direct PCB Termination and Space Optimization
The D38999/20FF11PCN is specifically designed for specialized electronic grids that require a seamless transition from external cable harnesses to internal printed circuit boards. By utilizing fixed PC tail contacts, this receptacle can be soldered directly onto a board, effectively eliminating the need for internal wiring and crimp terminations. This streamlined approach not only reduces the overall weight of the electronic assembly but also minimizes the internal space required for cable management. The square flange (Type 20) ensures a rigid four-point attachment to the chassis, providing a stable foundation that protects the solder joints on the PCB from the mechanical stresses encountered during mating cycles.
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 | E | threaded coupling |
19-11 High-Performance Layout and N-Keying Standard
Within the size 19 aluminum alloy shell, the D38999/20FF11PCN features the 19-11 insert arrangement, which provides eleven independent conductive channels. These channels utilize Size 16 contacts, which offer a significantly higher current-carrying capacity and greater mechanical durability compared to standard high-density signal pins. The “N” designation indicates the use of the normal polarization keyway, the industry-standard indexing for Series III interconnects. This ensures maximum compatibility with standard-issue plugs, making the D38999/20FF11PCN a versatile and future-proof gateway for both power distribution and robust signal transmission in mission-critical environments.
Environmental Resilience and "F" Class Conductivity
The “F” finish signifies that the D38999/20FF11PCN is treated with electroless nickel plating, a coating prized in aerospace for its dual-functionality. This finish provides exceptional corrosion resistance while maintaining the high conductivity required for superior EMI and RFI shielding. To safeguard the board-level electronics, the connector is equipped with high-resilience fluorosilicone interfacial seals. These seals create a moisture-proof and dust-proof barrier, ensuring that the 11-pole interface remains operational despite rapid pressure changes, high humidity, or exposure to industrial fluids and maritime salt spray.
Mechanical Security and Scoop-Proof Architecture
The D38999/20FF11PCN incorporates the signature Series III triple-start threaded coupling mechanism, providing a self-locking connection that is highly resistant to extreme vibration and shock. A critical safety feature is its 100% scoop-proof shell design; the eleven pin contacts are recessed deeply enough to prevent them from being bent or damaged if the mating plug is misaligned during the connection process. This mechanical robustness, combined with the precision of PCB-mount contacts, makes the D38999/20FF11PCN an ideal choice for engineers developing ruggedized, high-performance electronic modules that must perform flawlessly in the most demanding global grids.
Scoop-Proof Architecture and Field Reliability
A vital feature of the D38999/20FF11PCN is its 100% scoop-proof shell design, which ensures that the eleven PCB pins are recessed deeply enough to prevent damage if the mating plug is misaligned. This protection is critical for blind-mating scenarios common in ruggedized military and aerospace modules. By combining the precision of board-level mounting with the mechanical security of the Series III threaded interface, the D38999/20FF11PCN offers a future-proof interconnect solution that simplifies maintenance and enhances the longevity of high-performance electronic systems.
FAQ
Why choose PCB contacts over crimp contacts for the D38999/20FF11PCN?
Why choose PCB contacts over crimp contacts for the D38999/20FF11PCN?
PCB contacts allow for a permanent, space-saving connection directly to the circuit board, eliminating internal wiring and reducing the total weight and footprint of the device.
Does the "N" keying limit compatibility?
Does the "N" keying limit compatibility?
On the contrary, “N” is the standard polarization, meaning the D38999/20FF11PCN will mate with the vast majority of standard Series III plugs of the same size and arrangement.
What is the current capacity of the 11-pin 19-11 layout?
What is the current capacity of the 11-pin 19-11 layout?
The Size 16 contacts in this layout typically support up to 13 Amps, making them suitable for both robust signal transmission and power-intensive circuits.
How does the "F" finish improve EMI shielding?
How does the "F" finish improve EMI shielding?
The electroless nickel plating is highly conductive, ensuring a continuous electrical path between the shell and the chassis to block electromagnetic interference.
Is the D38999/20FF11PCN resistant to moisture?
Is the D38999/20FF11PCN resistant to moisture?
Yes, the integrated fluorosilicone interfacial seals and gaskets provide a moisture-proof and dust-proof barrier once the connector is fully mated.
Certification
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