Compact, Rugged Connector Platform Handles Demanding Environments

LEMO's latest connectors are engineered to meet the evolving needs of tactical communications, UAVs, avionics, and soldier-worn equipment.
Sept. 15, 2025
2 min read

Purpose-built for defense, aerospace, and mission-critical systems, the OPTIMA D Series, a compact and rugged connector platform from LEMO, can perform in the harshest environments. The connectors, which combine miniaturized form factors with military-grade reliability, are engineered to meet the evolving needs of tactical communications, UAVs, avionics, and soldier-worn equipment.

Features include IP68 sealing (20m/2h), even when unmated, along with MIL-STD-810H compliance for shock, vibration, and extreme environmental stress. Push-pull and break-away latching ensures secure, blind mating in high-pressure scenarios, with a modular design that has robust 5-way keying for rapid deployment and error-free connections. Multiple configuration options are available, such as high-speed (USB, Ethernet), multipole, and coaxial.

The OPTIMA D Series offers a compact, overmolded design that's 25% shorter than standard LEMO connectors, enabling space-constrained integration without compromising signal integrity or ruggedness. In addition, it has a uniform PCB height and flush-mounting options to streamline system architectures in compact, durable platforms.

Furthermore, LEMO  offers full cable assembly services, such as aiding in complex harness design, private labeling, and certified production: IPC-620, ISO 9001, AS9100, and MIL-STD-810.

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About the Author

Alix Paultre

Editor-at-Large, Microwaves & RF

Alix is Editor-at-Large for Microwaves & RF

An Army veteran, Alix Paultre was a signals intelligence soldier on the East/West German border in the early ‘80s, and eventually wound up helping launch and run a publication on consumer electronics for the U.S. military stationed in Europe. Alix first began in this industry in 1998 at Electronic Products magazine, and since then has worked for a variety of publications, most recently as Editor-in-Chief of Power Systems Design.

Alix currently lives in Wiesbaden, Germany.

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