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Product

industrial data rf cable seriesMIL-DTL-24643/61 · Watertight100 Ω · Cat.5e 100 MHz · 4×2×24 AWGLSZH XLPO · Bulkhead Transit

LSC5OSW-4 MIL-DTL-24643 LSC5OSW-4 Watertight Shipboard Cat5e LANMIL-DTL-24643/61 · Watertight shipboard Cat5e SF/UTP LAN · 100 Ω · 2.4 bar · LSZH

US Navy watertight shipboard Category 5e SF/UTP LAN cable (LSC5OSW-4) per MIL-DTL-24643/61 with four 100 Ω 24 AWG pairs, longitudinal water-blocking compounds tested to 35 psi (2.4 bar), overall Al/PET tape plus ≥ 85 % tinned copper braid, and LSZH sheath.

Water-resistant
Approved
Flame-retardant
Low-EMC design
Order designation
M24643/61-01UO (LSC5OSW-4)
Outer Ø ≈
8.89 mm
Wall thickness
1.15 mm
Total weight ≈
96.0 kg/km
Min. bend R (fixed)
71 mm
All sizes (8)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Impedance
100 Ω ± 15 Ω
1 to 100 MHz Category 5e LAN
Watertight
MIL-DTL-24643 W
Longitudinal & radial hydrostatic
Pairs / gauge
4 × 2 × 24 AWG
Solid or 7-strand bare/tinned Cu
Shielding
Foil + Cu braid
100% Al/PET tape + Sn-Cu braid
Outer jacket
LSZH XLPO
Cross-linked polyolefin (-30…+105°C)
Data rate
1000BASE-T
1 Gbps Gigabit Ethernet + PoE+

Typical values for this cable type, based on MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN) — confirmed in the datasheet and quotation for your order.

Application fit

Is LSC5OSW-4 right for your machine?

Specify LSC5OSW-4 and LSC5OSWA-4 for shipboard LAN trunks that penetrate watertight decks and bulkheads, ensuring compartment flood containment alongside 1000BASE-T Gigabit data integrity.

Immersion & wet locations

Suitable

Longitudinal water-blocking fillers and swellable tapes pass MIL-DTL-24643 hydrostatic compartment flood-containment tests.

Offshore platform & shipboard deck trays

Suitable

Round, firm cross-linked polyolefin outer sheath seals reliably inside naval multi-cable transit (MCT) frames and stuffing tubes.

VFD inverter to AC motor screened feeder

Suitable

Overall 100 % aluminum/PET foil plus ≥ 85 % tinned copper braid shields 100 MHz Ethernet signals from shipboard radar and machinery EMI.

Energy chain / drag chain

Not suitable

Water-blocked shipboard trunk cable is designed for fixed bulkhead and tray installation, not continuous drag chains.

Use ETHERLINE ROBUST FR
Typical machinesUS Navy Surface Ship & Submarine BulkheadsShipboard Damage-Control & Propulsion LANsAmphibious & Auxiliary Naval VesselsOffshore Platform Safety Shutdown NetworksNaval Shipyard Multi-Cable Transits

Construction

Layer by layer

MIL-DTL-24643/61 watertight Cat.5e build: 4×2×24 AWG pairs, dry water-blocking fillers/tapes in core and braid interstices, overall Al/PET foil + Sn-Cu braid, and LSZH XLPO jacket.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
124 AWG solid or water-blocked 7-strand copper4 twisted pairs of 24 AWG annealed bare or tinned copper with water-blocked intersticesPrevents water wicking along conductor strands under hydrostatic head
2Low-permittivity polyolefin / fluoropolymer insulationColour-coded low-loss insulation tuned to compensate for water-blocking tapes (100 Ω ± 15 Ω)Meets full Cat.5e insertion loss (≤ 22 dB/100m @ 100 MHz) despite water-blocking media
3Water-swellable tape + 100 % Al/PET foil screenNon-conductive dry water-swellable tape + 100 % coverage aluminum/polyester tapeInstantly gels upon seawater contact to block axial flood propagation
4Water-blocked tinned copper wire braid screenASTM B33 tinned copper wire braid (≥ 85 % coverage) + drain wire + swellable yarnsMaintains shield continuity and blocks water flow inside the braid annulus
5Cross-linked low-smoke zero-halogen (LSZH XLPO) sheathHeavy-duty thermoset cross-linked polyolefin jacket (Ø 8.89 mm; armored Ø 10.54 mm on OSWA)Seals tightly in naval stuffing tubes and passes IEEE 1202 vertical flame testing

M24643/61-01UO (LSC5OSW-4)

Unarmored watertight 4-pair 24 AWG Cat.5e shipboard LAN cable (Ø 8.89 mm)

M24643/61-01AU (LSC5OSWA-4)

Braided aluminum wire armored watertight 4-pair 24 AWG Cat.5e LAN cable (Ø 10.54 mm)

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN). Values for your order are confirmed in the datasheet and quotation.

Electrical

Characteristic impedance
100 Ω ± 15 Ω (1 to 100 MHz)
Max. conductor DC resistance
≤ 93.8 Ω/km at +20 °C
Mutual capacitance & VoP
≤ 56 pF/m · 68–70 % velocity of propagation
Attenuation @ 10 / 100 MHz
6.5 / 22.0 dB/100m max.
NEXT @ 10 / 100 MHz
≥ 50.3 dB / ≥ 35.3 dB

Thermal

Operating temperature
-30 °C to +105 °C
Voltage rating
300 V RMS · IEEE 802.3at PoE+ capable
Smoke & halogen content
MIL-DTL-24643 low-smoke zero-halogen (< 0.2 %)

Mechanical

Configuration
4 pairs × 24 AWG watertight SF/UTP
Nominal outer diameter
8.89 mm (LSC5OSW-4) · 10.54 mm (LSC5OSWA-4)
Min. bending radius
8 × OD (71 mm unarmored) · 10 × OD (armored)

Resistance

Watertightness test
MIL-DTL-24643 longitudinal hydrostatic water block
Flame propagation
MIL-DTL-24643 / IEEE 1202 vertical tray flame
Oil, fuel & weather
Resists marine diesel, lube oil, UV & salt fog

Reference standards

Military specification
MIL-DTL-24643/61 (M24643/61-01UO & -01AU)
LAN channel standard
ANSI/TIA-568.2-D & ISO/IEC 11801 Category 5e
RoHS & REACH
RoHS 3 & REACH SVHC compliant

Identification

Outer jacket colour
Black cross-linked polyolefin (LSZH XLPO)
Surface marking
M24643/61-01UO LSC5OSW-4 WATERTIGHT CAT5E LOW SMOKE
Customs tariff (HS)
8544.49

Sizes

8 standard configurations (LSC5OSW-4)

Engineering dimensions, impedance, propagation velocity, and electrical ratings for LSC5OSW-4 per MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN).

Dimensions & weights
Order designationImpedance / sizeConductor & dielectricWall ≈
mm		Outer Ø ≈
mm		Metal
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard LSC5OSW-4 configurations
M24643/61-01UO (LSC5OSW-4)4×2×24 AWG · WatertightSolid 24 AWG + Dry Block + OS1.158.8936.096.071
M24643/61-01AU (LSC5OSWA-4)4×2×24 AWG · WT ArmoredSolid 24 AWG + WT + Al Braid1.1510.5456.0138.0105
M24643/61-02UO (LSC5POSW-4)4×2×24 AWG · WT S/FTPPair Foil + Overall Braid WT1.209.4041.0108.075
M24643/61-02AU (LSC5POSWA-4)4×2×24 AWG · WT S/FTP Arm.Pair Foil + Overall + Al Braid1.2011.0562.0152.0111
M24643/61-03UO (Flex WT)4×2×24/7 AWG · WatertightStranded 24/7 Blocked + OS1.159.1437.0101.073
M24643/61-03AU (Flex WT Arm)4×2×24/7 AWG · WT ArmoredStranded 24/7 WT + Al Braid1.1510.8058.0144.0108
LSC5OSW-2 (2-Pair WT)2×2×24 AWG · Watertight2-Pair Watertight Cat.5e1.057.4024.068.059
LSC5OSW-4-22 (22 AWG WT)4×2×22 AWG · Long-Run WT22 AWG Extended Reach WT1.209.8048.0118.078
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal engineering values for LSC5OSW-4 subject to standard manufacturing tolerances per MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN).

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
Characteristic impedance, return loss (VSWR) & TDR sweep100 % frequency-domain return loss and TDR impedance verification per MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN)Every manufactured length
Dielectric spark & high-voltage withstand test100 % in-line spark and AC/DC dielectric withstand per MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN)Every spool or drum length
Sample tests
Insertion loss (attenuation), velocity & capacitance checkAttenuation (dB/100m), VoP (%), and capacitance within MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN) limitsPer production batch
Screening attenuation, transfer impedance & environmental qualificationQualified to MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN) EMC shielding, thermal, and flame/fluid criteriaType qualification

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

MIL-DTL-24643/61 & ANSI/TIA-568 Cat.5e (Watertight Shipboard LAN)CE (2014/35/EU) & RoHS 3 (2015/863/EU) CompliantREACH SVHC Compliance Verified

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX M24643/61-01UO LSC5OSW-4 WATERTIGHT CAT5E SHIPBOARD LOW SMOKE
Delivery form
Export wooden drums, flange reels or precision coils
Standard lengths
100 m · 305 m · 500 m · 1000 m (or custom cut lengths)
MOQ
100 m (stock sizes) · 300–500 m (custom build)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFLSC5OSW-4 MIL-DTL-24643 LSC5OSW-4 Watertight Shipboard Cat5e LAN – technical datasheet8 sizes · construction, technical data, approvalsXLSXLSC5OSW-4 spec data (Excel)All 8 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

Why is watertightness ('W') mandatory for shipboard LAN cables crossing naval bulkheads?
If a hull compartment floods after battle damage or collision, hydrostatic pressure can force seawater through the air spaces inside non-watertight cables into adjacent dry compartments and switchboards. LSC5OSW-4 uses dry water-swellable yarns and tapes to seal the cable core and shield interstices against longitudinal water flow.
How does LSC5OSW-4 achieve water blocking without increasing 100 MHz RF attenuation?
Conventional grease or gel filling raises dielectric permittivity and ruins high-frequency Ethernet return loss. LSC5OSW-4 uses dry super-absorbent swellable polymers paired with low-permittivity core insulation so insertion loss stays ≤ 22.0 dB/100m at 100 MHz.
When should I upgrade from LSC5OSW-4 (Cat.5e) to LSC6OSW-4 (Cat.6)?
Choose LSC5OSW-4 (/61) for 100 MHz 100BASE-TX and 1000BASE-T shipboard links; upgrade to LSC6OSW-4 (MIL-DTL-24643/65) when 250 MHz Category 6 headroom and tighter crosstalk margins are specified.
Does LSC5OSW-4 fit standard naval RJ45 and circular RJFTV connectors?
Yes. The 24 AWG conductors terminate into standard shielded RJ45 plugs and MIL-DTL-38999 Series III RJFTV bulkhead receptacles.

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LSC5OSW-4 MIL-DTL-24643 LSC5OSW-4 Watertight Shipboard Cat5e LAN

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