Compact and miniature connector for extreme conditions
LEMO’s latest innovation—the OPTIMA D Series—combines high-performance engineering with a compact, lightweight design built for the toughest environments. Developed for defence, aerospace, and mission-critical systems, it delivers IP68 protection even when unmated, robust 5-spur keying for secure blind mating, and a modular design for seamless integration. Rigorously tested to MIL-STD-810H, the OPTIMA D Series offers rugged reliability and design flexibility—all in a space-saving form factor.
Advanced design. Military-grade performance.
- Compact & Miniature Design
- Overmolded plug is 25% shorter than standard LEMO Series
- Small plug diameters optimize tight-space integration
- High contact density – up to 32 contacts in a compact form
Rugged & Reliable Performance
- MIL-STD-810H tested for shock, vibration, and environmental resistance
- IP68 sealing (20m/2h) even when unmated
- EMI/RFI shielding ensures clean, uninterrupted signal transmission
Modular Design for Maximum Flexibility
- Choice of push-pull or break-away latching systems
- Robust 5-spur keying enables safe and accurate blind mating
- Available in five sizes with multiple configurations:
. High-speed (USB, Ethernet)
. Multipole power/signal
. Coaxial solutions
Easy mechanical integration:
. Flush mounting on the enclosure
. Uniform PCB height across all sizes
Three socket models for streamlined system adaptation
Key features
- Compact size and miniature design
- Rugged design withstanding harsh conditions
- High pin density with a broad variety of combinations
- Sealing performance ensuring reliability in wet, dusty or submersible environments
- Dark and non-reflecting surface treatment with high corrosion resistance
- Secure locking mechanism even in high vibration environment
- Compliant with MIL-STD-810H, ensuring performance in the toughest military applications
Technical characteristics
- Endurance > 5000 matings
- Ingress Protection Index (mated): IP68 (20m/2h) unmated
- Housing material: Nickel plated brass
- Min. & Max. operating temperature:
. -55°C/+150°C (socket)
. -40°C/+90°C (plug & free socket)
- Salt fog : 1000 hours
- Vibration: 37.8g max, 8 hours
- Shielding effectiveness
. > 75 dB up to 10 MHz
. > 40 dB up to 1 GHz