MIL-DTL-26482 Series I circular connector | Vibration resistant | Salt spray resistant | High temperature resistant | Waterproof | Shockproof military circular connector，Aerospace Plug&Socket, MS3116F12-4S

Specifications

Wide-Temperature Performance

Temperature is the defining question for this model. High temperature electrical connectors are judged at both ends of the working range: in the cold, seals stiffen and contacts can shrink away from their seating; in the heat, inserts soften and resistance creeps up. The construction here is chosen to keep both effects in check, so the connector holds its electrical and sealing performance through repeated thermal cycling and not only at a steady bench temperature. That matters for equipment that is cold-soaked overnight and then run hard — an airframe waiting on a winter flight line, a vehicle started after a frost, electronics in an uninsulated bay. If your duty cycle includes rapid temperature change, tell us the extremes and how often they occur, and we will confirm this model against them.

Applications

• Airborne and avionics wiring bundles — Flight-control and avionics runs are bundled tightly and serviced on the aircraft, so the connector is mated and checked where there is little room to work, with the wiring bundle left in place around it.
• Ground vehicle and engine-bay electronics — High temperature electrical connectors in this position are judged after shutdown, when the bay soaks at its hottest and the contacts still have to stay seated through the vibration of the next run.
• Shipboard deck equipment and washdown areas — Deck junction boxes and weather-deck runs are where a harsh environment connector is tested hardest: salt-laden air, hose-down cleaning and constant hull vibration.
• Undersea sensor arrays and communication buoys — Sealed runs to sensors that spend their service life wet, mated once at build and left alone for long intervals between service visits.
• Rugged industrial automation — Oil and gas, mining and heavy machinery wiring bundles, where a commercial circular connector often gives up on fluid exposure and vibration long before its contacts wear out.

Ordering & Confirmation

1. Match the number first — quote it exactly as it appears on your drawing or on the marking of the part you are replacing, because shell size, insert arrangement and contact gender are all encoded in that number.
2. Confirm the mating half — tell us what is already on the existing cable assembly so we can check that both halves agree on shell size, insert arrangement and key position.
3. State the quantity and any spares — say whether this is a single repair or a production run, and how many units you want set aside for the maintenance kit.
4. Ask for what goes with it — the mating half and the cable-entry parts can go on the same enquiry, so the assembly work is not held up for a missing piece.
5. Send the drawing if you have one — as a military connector manufacturer we keep the Series I range available and can review the interface, flag anything that will not mate, and quote the full set together.

FAQ