•High/Low pressure
• Radiation & corrosion
• High Voltage
• Regulated environments
Your extreme solution

LEMO’s Extreme Requirements connector series provides highly specialised solutions targeted at extreme environment use. LEMO’s focus on the highest levels of quality and durability, combined with its very wide-ranging expertise and technical know-how, has resulted in engineered interconnect solutions designed to tackle all the most extreme potential hazards, each, in turn, representing a huge technological challenge. This includes additional stresses related to extreme conditions in terms of temperature and the elements, atmospheric pressure, vacuum, radiation, corrosion, shock and vibration. 

Unparalleled modularity and flexibility 

Most of LEMO’s connectors are based around LEMO’s renowned proprietary Push-Pull self-latching system, with its compact design, ease of use and excellent ergonomics. Based on the specificities of the target environment, interconnect solutions include shell plating, air/gas-resistant hermetic sealing and Ingress Protection (IP) ratings up to IP68.  
This is without counting on the unparalleled modularity and flexibility of the LEMO range which offers different specifications in terms of size and weight. 

Designed for the most regulated markets 

Thanks to its superior quality and ruggedness, the LEMO Group’s Extreme Requirements range is extensively recognised as the ‘go-to’ solution in numerous market segments across industrial, telecom, datacom, medical, energy, transportation, instrumentation and consumer applications. Most products come certification-ready so that they can operate in heavily regulated environments. Our customer support can provide custom design, engineering, and production solutions for any specific environment, based on LEMO’s extensive expertise and high-quality research data.  

Use the table to compare the 3 main series within the SUPREME connector family and to identify the connector(s) best adapted to your specific requirements.
N - Nuclear Stainless Steel

N - Nuclear Stainless Steel

See more details
W - Underwater

W - Underwater

See more details
Y - High Voltage Unipole

Y - High Voltage Unipole

See more details
Description Description Flawless performances in highly regulated environments such as nuclear hot cells Description High water pressure screw locking connectors designed for demanding marine and underwater applications Description Single contact high voltage connectors in high grade materials
Locking Locking Push-Pull telemanipulator Locking Screw locking Locking Push-Pull
Size Size 4 sizes from ø 22.0 to ø 45.0 mm (plugs) Size 6 sizes from Ø 17.2 to 50.0 mm (plugs) Size 3 sizes from Ø 13.0 to 47.0 mm (plugs)
Keying Keying 2 keyway Keying 4 keyway Keying No keyway (unipole)
Shell Types Shell Types Special shell design​ Shell Types Over 9 shell styles Shell Types Over 19 shell styles
Shell Material Shell Material Stainless steel Shell Material Stainless steel or Brass Shell Material Brass
Plating Plating - Plating Chrome on brass version Plating Chrome
Cable Diameter Cable Diameter 6.1 to 30.0 mm Cable Diameter 1 to 23.5 mm Cable Diameter 1.2 to 31.3 mm
NB of contact NB of contact 2 to 64 NB of contact 1 to 64 NB of contact 1
AWG AWG 8 to 32 AWG 8 to 32 AWG 2 to 21
Contact types Contact types Multipole • Coax Contact types Multipole • Coax • Fibre • Fluidic Contact types High Voltage
Contact Termination Contact Termination Solder / Crimp Contact Termination Solder / Crimp / Print (PCB) Contact Termination Solder
Test Voltage Test Voltage up to 3.6 kV (rms) Test Voltage up to 3.6 kV (rms) Test Voltage up to 70 kV (rms)
Sealing Level Sealing Level IP66 Sealing Level IP68, 30 bars Sealing Level IP50
Temperature Range Temperature Range -40°C to 160°C Temperature Range -20°C to 200°C Temperature Range -55°C to 230°C
Mating Cycles Mating Cycles > 5000 Mating Cycles > 1000 Mating Cycles > 1000
Product Finder
product finder

Discover your

perfect match

Explore LEMO's extensive product line and find the perfect product to suit your needs with our Product Finder tool. Our seamless search experience makes it easy to find exactly what you're looking for.

Find the ideal solution


icon pdf
High Pressure - under water W series
icon pdf
High voltage single contact connectors (Y, S, E and 05 series)
icon pdf
Solutions Selection Guide
icon pdf
Telemanipulator connectors N series
icon pdf
Product brief - High-speed data transfer
Other documents
Contact us
t Contact-us-1576x512.jpgt

Do you
have a 

No matter how harsh the environment may be, LEMO has a solution ready for you to implement today.

If not, we promise to relentlessly innovate and develop one for you. 
Please take a moment to reach out and describe your project, technical specifications and deadlines. We are standing by and looking forward to hearing from you - and adding your business to our thousands of longstanding satisfied customers, partners and employees - very soon.