D38999/20WD35PLA | 37-контактный разъем для печатной платы серии III (размер 15, ключ A)
The D38999/20WD35PLA is a size 15 MIL-DTL-38999 Series III receptacle with 37 pin PCB contacts. Features “W” olive drab cadmium finish and “A” polarization for high-density grids.
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D38999/20WD35PLA High-Density Signal Integration and Board-Level Efficiency
Он D38999/20WD35PLA is a specialized interconnect solution designed for advanced electronic grids where maximum signal density and streamlined assembly are paramount. Utilizing the size 15 shell, this receptacle facilitates thirty-seven independent signal channels through its 13-35 insert arrangement. The integration of fixed PC tail contacts allows the connector to be mounted directly onto a printed circuit board (PCB), eliminating the need for complex internal wire harnesses and manual crimp terminations. This board-level integration significantly reduces the total system weight and volume, making it a preferred choice for high-performance avionics and sophisticated ground-based sensor arrays.
Основные характеристики
Материал оболочки | Номинальное напряжение | Текущий рейтинг | Рабочая температура | Степень защиты от проникновения влаги и пыли | Циклы спаривания | Ключевая модуляция и поляризация | Соединение |
|---|---|---|---|---|---|---|---|
Алюминиевый сплав | ~1000 В переменного тока | ~23 А | от -65 °C до +200 °C | IP67 | 500 | A | резьбовая муфта |
Tactical Environmental Resilience and "W" Class Conductivity
The “W” finish of the D38999/20WD35PLA indicates a high-strength aluminum alloy shell treated with olive drab cadmium over an electroless nickel underplate. This multi-layered coating is 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. This conductivity is essential for maintaining effective EMI and RFI shielding, which protects the thirty-seven internal signal lines from electromagnetic noise in high-density electronic clusters and unpressurized aerospace compartments.
Специализированная поляризация А для обеспечения безопасности резервных систем
The “A” designation in the D38999/20WD35PLA part number indicates an alternate polarization keyway, providing a vital physical safeguard for complex electronic architectures. In mission-critical grids where multiple size 15 connectors are co-located on a single bulkhead, the “A” keying ensures that only a matching “A” key plug can be fully engaged. This mechanical lockout prevents the catastrophic risk of cross-mating different functional circuits—such as primary command signals and auxiliary sensor data. This standardized indexing logic streamlines both initial factory assembly and long-term field maintenance in high-pressure operational scenarios.
Precision Contact Fidelity and 15-35 Layout Integrity
Within the size 15 housing, the D38999/20WD35PLA employs the 15-35 high-density insert arrangement, providing thirty-seven 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. The gold plating ensures that the contacts remain protected against atmospheric oxidation throughout the equipment’s service life. Despite the dense proximity of the 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.
Структурная устойчивость и механическая прочность
The structural integrity of the D38999/20WD35PLA 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 design ensures that the thirty-seven delicate PCB pins are recessed deeply enough within the housing to prevent any damage if the mating plug is misaligned during the connection process, ensuring long-term field reliability for mission-critical grids.
Часто задаваемые вопросы
How many contacts are provided in the D38999/20WD35PLA?
How many contacts are provided in the D38999/20WD35PLA?
The 15-35 layout provides thirty-seven individual signal channels using high-density Size 22D pin contacts, offering excellent signal concentration for a size 15 shell.
What are the advantages of using PC tail contacts?
What are the advantages of using PC tail contacts?
Fixed PC tail contacts allow for direct soldering to a printed circuit board, which saves internal space, reduces system weight, and eliminates the complexity of internal wire management.
Why is the "A" keying important for this model?
Why is the "A" keying important for this model?
The “A” keying is an alternate polarization that provides a mechanical lockout to prevent cross-mating with nearby connectors of the same size, enhancing safety in complex panels.
Обеспечивает ли покрытие цвета «оливково-зеленый кадмий» экранирование от электромагнитных помех?
Обеспечивает ли покрытие цвета «оливково-зеленый кадмий» экранирование от электромагнитных помех?
Да, покрытие в форме буквы “W” обладает высокой проводимостью, обеспечивая надежный низкоимпедансный путь заземления между корпусом и шасси для превосходного подавления электромагнитных помех.
Сможет ли этот разъем выдерживать высокую вибрацию в аэрокосмической отрасли?
Сможет ли этот разъем выдерживать высокую вибрацию в аэрокосмической отрасли?
Безусловно. Самозатягивающаяся резьба с тройным заходом и четырехточечное квадратное фланцевое крепление специально разработаны для обеспечения электрической целостности при экстремальных уровнях вибрации современных тактических платформ.
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