SeaTex 7 HF – technical specifications and applications
Halogen-free 50 Ω coaxial cable for marine antenna and RF connections. The low-smoke SHF2 jacket resists oils, saltwater and UV radiation and is suitable for cabling on ships, offshore installations and wind turbines.
Foamed polyethylene insulation reduces transmission losses. Copper foil and copper braid provide double shielding to reduce the effect of external interference on the signal. Halogen-free, low-smoke and UV-resistant SHF2 jacket.
Construction and dimensions
- Outer diameter: Ø 7.3 ± 0.2 mm
- Inner conductor: Ø 1.9 mm; stranded copper (OFC), 19 × 0.38 mm (14 AWG)
- Dielectric: foamed PE with skin, Ø 5.0 mm
- Shielding: overlapping copper foil, 100% coverage; copper braid, 85% coverage
- Outer conductor diameter: Ø 5.7 mm
- Jacket: SHF2 / LSZH, black
- Weight: 73 g/m (73 kg/km)
- Supply: sold by the metre; standard reel 505 m (K505)
Electrical properties
Values at +20 °C unless otherwise stated.
- Impedance: 50 ± 2 Ω
- Maximum operating frequency: 6 GHz
- Capacitance: 78 pF/m (1 kHz)
- Velocity factor: 0.85
- Shielding attenuation: ≥ 90 dB at 1 GHz
- DC resistance: inner conductor ≤ 9 Ω/km; outer conductor 8.7 Ω/km
- Insulation resistance: ≥ 10 GΩ·km
- Test voltage: 10 kV DC (inner conductor–shield)
- Maximum voltage: 8 kV
Attenuation by frequency
Typical attenuation in dB / 100 m at +20 °C.
All 20 attenuation values (5–6000 MHz)
Example: the calculated attenuation of a 25-metre cable at 1 GHz is approximately 5.38 dB. Connector losses are additional.
Power handling
Maximum power in watts at +40 °C, as specified by the manufacturer.
Installation and operating conditions
- Minimum bend radius: 4 × outer diameter for a single bend; 8 × outer diameter for repeated bending
- Temperature, transport and fixed installation: −55…+85 °C
- Temperature, mobile use: −40…+85 °C
- Maximum tensile force: 300 N
- Installation: indoor and outdoor use; UV-resistant jacket
Select 50 Ω connectors sized for SeaTex 7 HF cable and follow the connector manufacturer’s stripping and assembly instructions. Protect outdoor connections against moisture and avoid crushing the cable.
Approvals and documents
- Jacket: SHF2, IEC 60092-360; halogen-free and low-smoke; CPR Fca (EN 50575)
- Flame propagation: IEC 60332-3-22, category A; IEC 60332-1-2
- Oil resistance: EN 60811-2-1, 24 h / 100 °C
- Marine applications: manufacturer-declared DNV certificate TAE00001JX
Manufacturer’s technical data: SSB SeaTex 7 HF . The product-specific data sheet and Declaration of Performance (DoP) are also available on the Documents tab.