HCA495-50J
5" HELIFLEX^® Air-Dielectric Coaxial Cable

Name: 5" HELIFLEX ® Air-Dielectric Coaxial Cable
SKU: HCA495-50J

Rev : G | Rev date : 15 Nov 2025

HELIFLEX® 5" low loss air dielectric cable

Feature / 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.

Applications

TV & Radio

HF Defense

Cable Solutions

Structure

Cable Type

Air-Dielectric, Corrugated

Size

Jacket Option

Black

Inner Conductor Diameter

45mm (1.77in)

Inner Conductor Material

Corrugated Copper Tube

Dielectric Diameter

98.1mm (3.86in)

Dielectric Material

Helical Polyethylene Spacer

Outer Conductor Diameter

109.3mm (4.3in)

Outer Conductor Material

Corrugated Copper

Jacket Diameter

115.1mm (4.53in)

Jacket Material

Polyethylene, PE

Testing and Environmental

Fire Performance

Halogene Free

Flame Retardant Jacket Specifications

Meets the requirements according to: IEC60754-1, IEC60754-2

Installation Temperature

-40°C to 60°C (-40°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)

Electrical Specifications

Impedance

50 +/- 0.5 Ω

Maximum Frequency

1 GHz

Velocity

97 %

Capacitance

68pF/m (20.7pF/ft)

Inductance

0.17µH/m (0.052µH/ft)

Peak Power Rating

1560 kW

RF Peak Voltage

12500 Volts

Jacket Spark

8000 Volt RMS

Inner Conductor dc Resistance

0.31ohm/1000 m (0.095ohm/1000 ft)

Outer Conductor dc Resistance

0.094ohm/1000 m (0.029ohm/1000 ft)

Return Loss (VSWR) Performance

Standard

Phase Stabilized

Phase matched cables and assemblies are available upon request.

Mechanical Specifications

Cable Weight

4.5kg/m (3lb/ft)

Minimum Bending Radius

500mm (20in)

Minimum Bending Radius

1200mm (47in)

Bending Moment

335 (247)

Tensile Strength

3000N (674lb)

Recommended / Maximum Clamp Spacing

1 / 2 (3.3 / 6.6)

Attenuation @ 20°C (68°F) and Power Rating @ 40°C (104°F)

Frequency, MHz	dB per 100m	dB per 100ft	Power, kW
0.5	0.02	0.006	1200
1	0.028	0.008	848
1.5	0.034	0.01	692
2	0.039	0.012	599
10	0.088	0.027	266
20	0.125	0.038	187
30	0.153	0.047	153
50	0.199	0.061	118
88	0.266	0.081	88.3
100	0.284	0.087	82.7
108	0.295	0.09	79.7
150	0.35	0.107	67.3
174	0.378	0.115	62.4
200	0.406	0.124	58.1
300	0.503	0.153	47.1
400	0.585	0.178	40.7
450	0.623	0.19	38.3
500	0.659	0.201	36.3
512	0.667	0.203	35.9
600	0.726	0.221	33.1
700	0.789	0.24	30.5
800	0.848	0.258	28.5
824	0.861	0.263	28.1
894	0.9	0.274	27
900	0.904	0.275	26.9
925	0.917	0.28	26.5
960	0.936	0.285	26
1000	0.957	0.292	25.5