D38999/26FF11SE | 11-Socket Series III Electroless Nickel Plug (Size 19, Key E)
The D38999/26FF11SE is a size 19 MIL-DTL-38999 Series III aluminum plug with 11 socket contacts. Features “F” electroless nickel finish and “E” polarization for mission-critical grids.
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D38999/26FF11SE Optimized Power Distribution in Mid-Size Electronic Grids
The D38999/26FF11SE is a precision-engineered interconnect solution designed for specialized electronic grids that require a balanced integration of power and signal density. Utilizing the size 19 aluminum alloy shell, this straight plug facilitates eleven independent conductive channels through its 19-11 insert arrangement. Unlike ultra-high-density signal connectors, the 19-11 layout employs Size 16 socket contacts, which are engineered to handle higher current loads with minimal heat dissipation. This makes the D38999/26FF11SE an essential component for localized power distribution units, actuator control systems, and high-fidelity sensor arrays where electrical stability is a primary operational requirement.
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 |
Electroless Nickel Finish and Superior EMI Suppression
The “F” class finish of the D38999/26FF11SE consists of high-purity electroless nickel plating applied over the aluminum housing, providing a clean, durable, and highly conductive surface. This finish is specifically selected for environments where electromagnetic compatibility (EMC) is a critical design factor. The electroless nickel provides a low-impedance ground path across the shell-to-shell interface, which, combined with the plug’s internal grounding fingers, ensures 360-degree shielding effectiveness. This protects the eleven internal conductive lines from RFI and EMI, ensuring that sensitive digital telemetry remains uncorrupted in the dense electromagnetic environments typical of modern aircraft and radar platforms.
Alternate E-Keying for Error-Proof System Architecture
The D38999/26FF11SE features the “E” polarization keyway, providing a unique physical indexing configuration that is distinct from the standard “N” or “A” positions. In complex system panels where multiple size 19 connectors are co-located, utilizing alternate keys like “E” is a critical safety strategy to prevent accidental cross-mating. This physical lockout mechanism ensures that only the specifically keyed plug can be mated with its corresponding receptacle, eliminating the risk of human error during rapid field assembly or equipment overhauls. Combined with the triple-start threaded coupling, the “E” keying ensures a verified and secure connection for high-stakes digital grids.
Precision Socket Fidelity and 19-11 Layout Integrity
Within the size 19 housing, the D38999/26FF11SE employs eleven Size 16 socket contacts, offering a robust and reliable female interface for critical power and signal channels. These sockets are precision-machined from high-conductivity copper alloy and finished with high-grade gold plating to prevent atmospheric oxidation and maintain low contact resistance throughout the equipment’s service life. The high-performance dielectric insert ensures that each of the eleven channels is electrically isolated, maintaining superior insulation resistance even under rapid pressure changes or high humidity. This ensures that the power grid remains free from electrical leakage and short circuits in unpressurized aerospace compartments.
Mechanical Integrity and Self-Locking Coupling Security
As a Series III straight plug, the D38999/26FF11SE features a triple-start threaded coupling mechanism with an integrated self-locking ratchet system. This design facilitates a rapid and secure connection with only one full 360-degree turn of the coupling nut, providing both tactile and audible confirmation of a verified mate. The internal anti-decoupling device ensures that the connector remains locked even under the severe harmonic vibrations and mechanical shocks common in jet engine compartments or high-performance military vehicle operations. This mechanical robustness ensures constant electrical continuity across the eleven-pin grid, preventing intermittent power loss during high-stress maneuvers.
FAQ
How many contacts are provided in the D38999/26FF11SE?
How many contacts are provided in the D38999/26FF11SE?
The 19-11 layout features eleven independent conductive channels using Size 16 socket contacts, optimized for medium-current power distribution and signal transmission.
What are the advantages of the Electroless Nickel (F) finish?
What are the advantages of the Electroless Nickel (F) finish?
The “F” finish offers excellent surface conductivity for superior EMI/RFI shielding and a durable, corrosion-resistant surface suitable for controlled aerospace and industrial environments.
What is the role of the alternate "E" keying position?
What is the role of the alternate "E" keying position?
The “E” keying provides a specific physical orientation that prevents the plug from mating with receptacles keyed to other positions, ensuring safety in multi-connector panels.
Is the D38999/26FF11SE compatible with standard Series III receptacles?
Is the D38999/26FF11SE compatible with standard Series III receptacles?
Yes, as long as the mating receptacle is size 19, has the 11 layout, and is also configured with the “E” polarization keyway, it will be fully intermateable.
Does this plug provide protection against vibration?
Does this plug provide protection against vibration?
Absolutely. It features a self-locking triple-start threaded coupling mechanism designed to maintain electrical continuity under extreme mechanical shock and harmonic vibration.
Certification
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