Lifetime Connectivity

HCA400-50JFN
4" HELIFLEX® Air-Dielectric Coaxial Cable, flame retardant/ halogen free jacket

Rev : G | Rev date : 15 Jan 2026

HELIFLEX® 4" low loss air dielectric cable; flame retardant/ halogen free jacket

Features / Benefits

  • Low Attenuation
    The low attenuation of HELIFLEX® coaxial cable results in highly efficient signal transfer in your RF system.
  • Complete Shielding
    The solid outer conductor of HELIFLEX® coaxial cable creates a continuous RFI/EMI shield that minimizes system interference.
  • Low VSWR
    Special low VSWR versions of HELIFLEX® coaxial cables contribute to low system noise.
  • Outstanding Intermodulation Performance
    HELIFLEX® coaxial cable's solid inner and outer conductors virtually eliminate intermods. Intermodulation performance is also confirmed with state-of-the-art equipment at the RFS factory.
  • High Power Rating
       Due to their low attenuation, outstanding heat transfer properties and temperature stabilized dielectric
    materials, HELIFLEX® cable provides safe long term operating life at high transmit power levels.
  • Wide Range of Application
    Typical areas of application are: feedlines for broadcast and terrestrial microwave antennas, wireless cellular, PCS and ESMR base stations, cabling of antenna arrays, and radio equipment interconnects.
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Applications
Applications TV & Radio HF Defense Cable Solutions
Structure
Cable Type HCA
Size 4"
Jacket Option Indoor
Inner Conductor Material Corrugated Copper Tube
Dielectric Material Helical Polyethylene Spacer
Outer Conductor Material Corrugated Copper
Jacket Material Black Polyethylene, Metalhydroxite Filling
Mechanical Specifications
Inner Conductor Diameter 34.8mm (1.37in)
Dielectric Diameter 75.3mm (2.96in)
Outer Conductor Diameter 85.5mm (3.36in)
Jacket Diameter 90.5mm (3.56in)
Cable Weight 3.1kg/m (2.1lb/ft)
Min Bending Radius, Single Bend 380mm (15in)
Min. Bending Radius, Repeated Bends 890mm (35in)
Bending Moment 215 Nm (159 lbf*ft)
Tensile Strength 1,800N (405lb)
Air Volume 5l/m (0.0538ft³/ft)
Recommended / Maximum Clamp Spacing 0.8 / 1.2 m (2.75 / 4 ) ft
Electrical Specifications
Impedance 50 +/- 0.5 Ω
Max. Operating Frequency 1.66 GHz
Velocity 96 %
Capacitance 70pF/m (21.3pF/ft)
Inductance 0.175µH/m (0.053µH/ft)
Peak Power Rating 940 kW
RF Peak Voltage 9,700 V
Jacket Spark 8,000 V RMS
DC-Resistance Inner Conductor 0.43Ω/km (0.13Ω/kft)
DC-Resistance Outer Conductor 0.13Ω/km (0.04Ω/kft)
Return Loss (VSWR) Performance Standard
Min. Return Loss (Max. VSWR) Typical 20.8dBdB (1.2 VSWR or better within the operation bands of most global frequency ranges. Premium also available. Contact factory for options in your specific frequency band.VSWR)
Testing and Environmental
Fire Performance Flame Retardant, Halogen Free, Low Smoke
Compliance

RoHS 2011/65/EU
China RoHS SJ/T 11364-2006
IEC 60754-1/-2 Halogen Acid Gases
REACH (EC 1907/2006)
IEC 60332-1 Single-Cable Flame Test
IEC 61034-1, -2 Smoke Density Measurement
EN 50575:2014 + A1:2016 Construction Products Regulation

Phase Stabilized Phase matched cables and assemblies are available upon request.
Installation Temperature -25°C to 60°C (-13°F to 140°F)
Storage Temperature -70°C to 85°C (-94°F to 185°F)
Operation Temperature -50°C to 85°C (-58°F to 185°F)
Attenuation and Power Rating
Frequency, MHz dB per 100m dB per 100ft Power, kW
0.5 0.025 0.008 792
1 0.035 0.011 561
1.5 0.043 0.013 457
2 0.049 0.015 395
10 0.111 0.034 175
20 0.158 0.048 123
30 0.194 0.059 100
50 0.252 0.077 77.4
88 0.338 0.103 57.9
100 0.362 0.11 54.1
108 0.377 0.115 52
150 0.448 0.136 44
174 0.484 0.148 40.8
200 0.521 0.159 38
300 0.648 0.198 30.9
400 0.757 0.231 26.7
450 0.808 0.246 25.1
500 0.856 0.261 23.8
512 0.867 0.264 23.6
600 0.946 0.288 21.8
700 1.03 0.314 20.2
800 1.11 0.339 18.9
824 1.13 0.344 18.6
894 1.18 0.36 18
900 1.19 0.362 17.8
925 1.21 0.367 17.6
960 1.23 0.375 17.3
1000 1.26 0.384 17
Note Standard Conditions:
For attenuation: VSWR 1.0, cable temperature 20°C (68°F).
For average power: VSWR 1.0, ambient temperature 40°C (104°F), inner conductor temperature 115°C (239°F). No solar loading.

External Document Links

Notes

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