MS3112E12-8P | 8-Pin MIL-DTL-26482 Series I Box Mount Receptacle (Size 12)
The MS3112E12-8P is a size 12 MIL-DTL-26482 Series I box mount receptacle with 8 pin contacts. Features “E” class environmental sealing and a rugged olive drab cadmium finish.
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MS3112E12-8P Efficiency of Box Mount Integration in Fixed Electronic Grids
The MS3112E12-8P is a high-precision interconnect solution specifically designed for specialized electronic grids that require a low-profile, permanent mounting interface on equipment chassis or junction boxes. Utilizing the size 12 aluminum alloy shell, this box mount receptacle facilitates eight independent conductive channels through its versatile 12-8 insert arrangement. Unlike cable-connecting plugs, the MS3112 series is designed to be bolted directly to a bulkhead, providing a stable and grounded connection point for external wire harnesses. This architecture is essential for localized control panels, power distribution boxes, and industrial automation interfaces where internal volume is limited and a flush-mounted profile is required.
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 Environmental Defense and E-Class Sealing
The “E” class designation of the MS3112E12-8P signifies an environmentally resistant construction that includes a high-performance interfacial seal and a rear wire-sealing grommet. This internal sealing grid is engineered to prevent the ingress of moisture, dust, and hydraulic fluids, ensuring the eight electrical circuits remain isolated from atmospheric contaminants. The aluminum housing is treated with olive drab cadmium plating over an electroless nickel underplate, providing a robust multi-layered defense certified to withstand harsh field conditions. This level of protection is vital for ground-based defense systems and maritime communication grids where long-term exposure to salt spray and high humidity is expected.
Rapid Bayonet Coupling and Mechanical Reliability
As a MIL-DTL-26482 Series I component, the MS3112E12-8P utilizes a three-point bayonet coupling system for rapid and secure mating. This design allows for a quick-disconnect interface that can be fully engaged with only a partial turn of the mating plug, providing both tactile and audible confirmation of a verified lock. The bayonet mechanism is inherently resistant to decoupling under high-vibration and mechanical shock, making it a superior choice for vehicle-mounted electronics and heavy-duty industrial machinery. This mechanical stability ensures constant electrical continuity for the eight conductive lines, even in environments subject to constant harmonic stress and physical movement.
Precision Pin Fidelity and 12-8 Layout Versatility
Within the size 12 housing, the MS3112E12-8P employs eight Size 20 pin contacts, offering a reliable interface for a variety of digital and analog signal sets. These pins are precision-machined from copper alloy and finished with high-grade gold plating to ensure low contact resistance and prevent oxidation throughout the equipment’s operational life. The Size 20 contact is highly valued in tactical grids for its ability to carry moderate current loads while maintaining high signal integrity. The high-performance dielectric insert provides exceptional insulation resistance between the eight channels, ensuring that the signal grid remains free from electrical crosstalk and leakage in mission-critical command and telemetry systems.
Mechanical Robustness and Shielding Effectiveness
The structural reliability of the MS3112E12-8P is supported by its rigid aluminum shell and the standardized four-hole square flange mounting pattern. This configuration provides a strong mechanical bond between the receptacle and the equipment panel, ensuring that the stresses of mating and unmating are not transferred to the internal electronics. Furthermore, the conductive nature of the cadmium-plated shell provides essential EMI and RFI shielding, protecting the eight signal lines from external electromagnetic interference. This combination of physical durability and electrical isolation makes the MS3112E12-8P a dependable choice for ruggedized digital environments where long-term reliability is the highest priority.
FAQ
What does the "E" class represent in the MS3112E12-8P?
What does the "E" class represent in the MS3112E12-8P?
The “E” class indicates environmental resistance, featuring high-quality seals and grommets to protect the internal electrical interface from moisture, dust, and chemical contaminants.
How many pins are provided in the 12-8 layout?
How many pins are provided in the 12-8 layout?
The 12-8 layout provides eight independent conductive channels using Size 20 pin contacts, making it suitable for a wide range of signal and low-power applications.
What mounting style does the MS3112 series use?
What mounting style does the MS3112 series use?
The MS3112 is a box mount receptacle featuring a square flange with four mounting holes for permanent attachment to a panel or chassis.
Is the MS3112E12-8P compatible with other Series I connectors?
Is the MS3112E12-8P compatible with other Series I connectors?
Yes, it is designed to mate with any MIL-DTL-26482 Series I plug of the same shell size (12) and layout (8), regardless of the manufacturer, as long as it uses bayonet coupling.
What finish is applied to the shell of this receptacle?
What finish is applied to the shell of this receptacle?
The shell is finished with olive drab cadmium plating over an electroless nickel base, providing excellent corrosion resistance and conductivity for EMI shielding.
Certification
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