MS3476B22-55SN | 55-Socket MIL-DTL-26482 Series II Plug (Size 22) – Olive Drab Cadmium
The MS3476B22-55SN is a size 22 MIL-DTL-26482 Series II straight plug with 55 socket contacts. Features an olive drab cadmium finish for superior corrosion resistance and EMI shielding.
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MS3476B22-55SN Efficiency of Massive Signal Consolidation in Series II Grids
The MS3476B22-55SN is an advanced interconnect solution designed for specialized electronic grids that require the highest possible signal density within a mobile, standardized interface. Utilizing the size 22 aluminum alloy shell, this Series II straight plug facilitates fifty-five independent conductive paths through its 22-55 insert arrangement. This configuration is a critical asset for modern mission computers and large-scale data acquisition systems where fifty-five Size 20 socket contacts provide the necessary capacity for immense telemetry throughput. As a Series II component, it offers improved performance characteristics over earlier designs, ensuring a streamlined yet powerful mechanical interface for complex digital and analog command networks.
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 | quick bayonet coupling |
Tactical Advantages of Olive Drab Cadmium Protection
The MS3476B22-55SN features a high-performance olive drab cadmium plating over an electroless nickel underplate, which provides a highly durable and conductive surface. This specific treatment ensures excellent shell-to-shell conductivity, which is essential for maintaining effective EMI and RFI shielding integrity across the entire connection. Beyond its electrical properties, the olive drab coating offers world-class resistance to salt spray and atmospheric corrosion, protecting the aluminum housing in the most aggressive maritime and field conditions. This finish makes the MS3476B22-55SN a preferred choice for external aerospace panels and ground-based tactical systems where environmental survival is a primary requirement.
Rear-Release Crimp System and Maintenance Reliability
A defining technical feature of the MS3476B22-55SN is its adherence to the MIL-DTL-26482 Series II standard, which utilizes a rear-release crimp contact system. Unlike solder-type connectors, the contacts in this plug are secured by internal metal retaining clips and can be inserted or removed from the rear using specialized plastic or metal tools. This design significantly simplifies field maintenance and repair, as individual damaged wires can be replaced without replacing the entire connector assembly. This mechanical reliability is a vital factor for high-uptime environments such as automated factory floors and mobile communication arrays, ensuring that the fifty-five conductive lines remain secure even under constant mechanical vibration.
Precision Socket Fidelity and 22-55 Layout Performance
Within the size 22 housing, the MS3476B22-55SN employs fifty-five Size 20 socket contacts, offering a high-fidelity female interface for a vast array of digital signal sets and low-level power feeds. These sockets are precision-machined from copper alloy and finished with high-grade gold plating to maintain an ultra-low-resistance electrical path throughout the equipment’s lifespan. The socket design provides inherent electrical safety, as the conductive elements are recessed within the dielectric insert, preventing accidental short-circuits during the mating process. The high-performance dielectric insert provides exceptional insulation resistance between the fifty-five channels, preventing electrical crosstalk and signal leakage in mission-critical grids.
Rapid Bayonet Coupling and Structural Robustness
The MS3476B22-55SN utilizes a three-point bayonet coupling system, allowing for rapid and secure mating with a simple partial turn of the coupling nut. This mechanical interface provides tactile and audible confirmation that the connection is fully locked, which is essential for rapid assembly in high-stress or low-visibility field conditions. The structural robustness of the size 22 aluminum shell ensures that the physical stresses of frequent mating cycles are managed without compromising the internal electronics. This combination of high-density connectivity, specialized conductive finish, and rear-release maintenance capabilities makes the MS3476B22-55SN a dependable choice for ruggedized mobile environments where signal integrity is the highest priority.
FAQ
Why is the olive drab cadmium finish important for the MS3476B22-55SN?
Why is the olive drab cadmium finish important for the MS3476B22-55SN?
This finish provides a unique combination of extreme corrosion resistance (up to 500 hours of salt spray) and high electrical conductivity, which is necessary for effective EMI/RFI shielding.
What are the benefits of the Series II crimp contacts?
What are the benefits of the Series II crimp contacts?
Series II contacts are rear-release and crimp-terminated, allowing for easier assembly, better vibration resistance, and the ability to replace individual pins or sockets in the field without desoldering.
How many signal paths does the 22-55 layout provide?
How many signal paths does the 22-55 layout provide?
The 22-55 layout features fifty-five independent Size 20 contact positions, offering the highest signal density for a size 22 shell in this connector series.
Is the MS3476B22-55SN intermateable with Series I receptacles?
Is the MS3476B22-55SN intermateable with Series I receptacles?
Yes, MIL-DTL-26482 Series II plugs are designed to be intermateable with Series I receptacles of the same shell size and layout, ensuring compatibility with a wide range of existing equipment.
What type of maintenance tools are required for this connector?
What type of maintenance tools are required for this connector?
A standard rear-release insertion and removal tool is required to install or extract the crimp contacts from the rear of the connector grommet.
Certification
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