MS3476B22-55SZ | 55-Socket MIL-DTL-26482 Series II Plug with Z-Key (Size 22) – Olive Drab Cadmium
The MS3476B22-55SZ is a size 22 MIL-DTL-26482 Series II straight plug with 55 socket contacts and Z orientation. Features an olive drab cadmium finish and rear-release crimp system.
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MS3476B22-55SZ Efficiency of Coded High-Density Connectivity in Series II Grids
The MS3476B22-55SZ is an advanced interconnect solution designed for specialized electronic grids that require massive signal consolidation within a mobile and error-proof interface. Utilizing the size 22 aluminum alloy shell, this Series II straight plug facilitates fifty-five independent conductive paths through its ultra-high-density 22-55 insert arrangement. The inclusion of the Z-keying position is a critical technical refinement, allowing engineers to differentiate between multiple identical size 22 connectors on a single command console. By utilizing this alternate rotational position, the MS3476B22-55SZ acts as a physical firewall, ensuring that sensitive telemetry and control signals are never cross-mated, even in high-pressure operational environments.
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 and W-Class Defense
The MS3476B22-55SZ features a high-performance olive drab cadmium plating over an electroless nickel underplate, providing a highly durable and conductive surface required for mission-critical hardware. 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 MS3476B22-55SZ 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 MS3476B22-55SZ 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 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 and repetitive deployment.
Precision Socket Fidelity and 22-55 Layout Performance
Within the size 22 housing, the MS3476B22-55SZ 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 sensitive grids.
Rapid Bayonet Coupling and Structural Robustness
The MS3476B22-55SZ 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 Z-keying, and rear-release maintenance capabilities makes the MS3476B22-55SZ a dependable choice for ruggedized mobile environments where signal integrity is the highest priority.
FAQ
What does the "Z" stand for in MS3476B22-55SZ?
What does the "Z" stand for in MS3476B22-55SZ?
The “Z” denotes a specific alternate rotational position for the insert, used to provide unique polarization and prevent accidental cross-mating with other nearby connectors of the same size and layout.
What are the benefits of the Series II crimp contact system?
What are the benefits of the Series II crimp contact system?
Series II contacts are rear-release and crimp-terminated, which allows for better vibration resistance and enables field technicians to replace individual damaged contacts without replacing the entire connector.
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 family.
Is the MS3476B22-55SZ intermateable with Series I receptacles?
Is the MS3476B22-55SZ 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, though the receptacle must also match the Z-keying position.
Why is olive drab cadmium used for the finish of this connector?
Why is olive drab cadmium used for the finish of this connector?
It is the industry standard for providing a combination of extreme corrosion resistance (up to 500 hours of salt spray) and excellent electrical conductivity for EMI/RFI shielding.
Certification
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