W - Underwater

High water pressure screw locking connectors designed for demanding marine and underwater applications
W - Underwater
Screw locking
High hydrostatic pressure environments (5 to 30 bar)
Keying system
Main Features
Screw locking
High hydrostatic pressure environments (5 to 30 bar)
Keying system
Reliable High quality and performance interconnect solutions
Modular and custom made complete solutions
Worldwide presence with local experts, stock management and cable assembly everywhere

Form & Material

Broad metallic high quality circular connector range for high hydrostatic pressure environments (e.g. underwater)
Latching system
Screw locking system enabling simple yet safe and reliable frequent connect and disconnect
Keying system
Keying system allowing for a high contact density, with multiple key options to prevent mismating
Field proven solid & compact construction resisting to extreme conditions (e.g. immersion into salt water)
Ergonomic design
Size and model
Various sizes and models including miniature and vaccumtight models

Electrical configurations

Insert configurations
Large selection of insert configurations including high-density low voltage, coaxial, triaxial, fibre optic, fluidic and thermocouple contacts as well as hybrid solutions
360° screening for full EMC shielding
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High Pressure - under water W series
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Solutions Selection Guide
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Product brief - High-speed data transfer
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75Ω/3GHz coaxial contact
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High-speed data transfer
Suitable applications
Specialities & Other
specialities other
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

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W - Underwater

W - Underwater

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Y - High Voltage Unipole

Y - High Voltage Unipole

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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 5 kV DC Test Voltage up to 5 kV DC Test Voltage up to 50 kV DC
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
W - Underwater

The W series is designed for high hydrostatic pressure environments, for example for underwater applications to approx. 300 metres (5 to 60 bars depending on socket size). The W series with screw locking is field-proven, and constructed for extreme conditions such as long immersion in saltwater. Multiple keys allow for high contact density and prevent mis-mating. W series connectors are suitable for test and measurement applications and the oil and gas, nuclear, chemical, marine and aerospace industries. This series offers a large selection of insert configurations, a variety of sizes and models, and electromagnetic (EMC) shielding. 


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Article • 06 August 2023

New multi coaxial model with High frequency performance

LEMO is thrilled to announce the expansion of its field-proven M Series with a new multi coaxial configuration, named LM.232, available in size LM with up to 12x coaxial contacts. These new plugs and fixed sockets have been specifically designed to satisfy the most stringent high frequency connection requirements under very demanding environmental conditions.This new insert configuration integrates 12x coaxial contacts type 0R (50 Ohm), allowing the transmission of high frequency data up to 26.5 GHz with a low Voltage Standing Wave Ratio (VSWR). The coaxial contact is easy to mount, thanks to its crimp contact and retaining clip. It is designed to be terminated with flexible low-loss communication cable LMR-100A or MULTIFLEX 86.Typical applications are wireless network 5G wireless networks, radar systems, battlefield communications and UAV anti-drone technology.Thanks to its expertise and cable assembly capabilities, LEMO is at your disposal to assist you in providing complete interconnect solutions.

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