High-Performance MIL-DTL-26482 Series Environmentally Sealed Circular Connector
The MS3110E22-21SN to for mission-critical applications, this connector delivers exceptional environmental sealing, mechanical robustness, and reliable electrical performance in the with legacy systems while providing modern reliability enhancements for next-generation platforms.
This connector series is engineered for defense and industrial systems requiring uncompromising reliability:
| Parameter | Specification | Shell Material | Aluminum alloy, cadmium plated | | Contact Plating | Gold over nickel | | Insert Material | Thermoplastic, chemical-resistant | | Temperature Range | -| Mating Cycles | 500 minimum | | Sealing Performance | IP68 (submersible to 10m depth) |
The product delivers:
| Parameter | Specification |
|---|---|
| Series | MIL-DTL-26482 Series I, Revision G |
| Shell material | Aluminum alloy, cadmium plated |
| Plating standard | MIL-STD-171 |
| Contact plating | Gold over nickel |
| Insert material | Thermoplastic, chemical-resistant |
| Temperature range | -65 °C to +175 °C |
| Sealing | IP68, submersible to 10 m |
| Mating cycles | 500 minimum |
| Current rating | Up to 5 A per contact |
| Voltage rating | Up to 500 V |
| Shielding | EMI/RFI performance to MIL-STD-461 |
| Restricted substances | RoHS/REACH-compliant versions available |
The Series I standard fixes the interface, so this receptacle mates with the corresponding plug of the same shell size, insert arrangement and key position, which is a separate line item on the order. A keyed, polarized coupling means the pair can only be assembled one way, and that is what stops a forced connection from bending contacts in a cramped bay. Because the interface comes from the standard rather than from one workshop, a receptacle from one military grade connector supplier intermates with a plug from another, and a like-for-like replacement leaves the existing wiring undisturbed. Spares bought years apart still fit the same plug, which is the practical value of buying to a standard rather than to a shape.
Treat the two series as separate standards rather than a straight swap. MIL-DTL-26482 Series I and Series II parts belong to the same connector family, but the interface details are not automatically identical, so a substitution should be checked part number by part number. Send us the original number and the equipment it is fitted to, and you will get a straight answer on what will actually mate before you commit to a build.
Both are fixed by the part number. The shell-size and insert-arrangement digits identify the insert, and the letter after them tells you whether the contacts are sockets or pins. The simplest cross-check is your mating half, because a receptacle carrying sockets pairs with a plug carrying pins. Give us the mating part number and we will confirm the count and gender for that arrangement before anything is built.
Yes, once the pair is correctly mated. That is when the interface seal does its job, and it is the reason a harsh environment connector of this type is rated for submersion rather than only for splashes. An unmated receptacle is a different story, so keep the protective cap fitted and the contact area clean until the plug goes on, and check that the coupling is fully engaged before the equipment returns to service.
Rinse salt deposits off the shell with fresh water and dry it rather than letting them sit through the next deployment. Keep the protective cap on any unmated half, and inspect the coupling and the contact area at each maintenance interval. A receptacle whose plating has been scraped back to bare metal should be replaced rather than patched, because that is where corrosion starts.
Every unit is screened before packing. As a circular connector manufacturer we run in-house environmental sealing checks and high-vibration testing on production units, so a poor seal or a loose contact is caught here rather than at your bench. If your program needs test data or an inspection record with the shipment, tell us when you order and it can be arranged.
Keep them in their original packaging in a dry, ventilated store, with the protective caps in place until the moment of fitting. Handle the shell rather than the contact faces, and avoid solvents or abrasives on the plated surfaces. A receptacle that has sat on a shelf for years is normally still serviceable, but inspect the contact area and the sealing faces before it goes onto live equipment.
