LEMO
LEMO's OPTIMA compact and rugged connector platform.

Compact, Rugged Connector Platform Handles Demanding Environments

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

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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