HCA550-50J
5-1/2" HELIFLEX^® Air-Dielectric Coaxial Cable

Name: 5-1/2" HELIFLEX ® Air-Dielectric Coaxial Cable
SKU: HCA550-50J

Rev : G | Rev date : 15 Nov 2025

HELIFLEX® 5-1/2" 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

5-1/2

Jacket Option

Black

Inner Conductor Diameter

58mm (2.28in)

Inner Conductor Material

Corrugated Copper Tube

Dielectric Diameter

127mm (5in)

Dielectric Material

Helical Polyethylene Spacer

Outer Conductor Diameter

140.5mm (5.53in)

Outer Conductor Material

Corrugated Copper

Jacket Diameter

147.1mm (5.79in)

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

0.86 GHz

Velocity

96 %

Capacitance

70pF/m (21.3pF/ft)

Inductance

0.175µH/m (0.053µH/ft)

Peak Power Rating

2250 kW

RF Peak Voltage

15000 Volts

Jacket Spark

8000 Volt RMS

Inner Conductor dc Resistance

0.2ohm/1000 m (0.06ohm/1000 ft)

Outer Conductor dc Resistance

0.057ohm/1000 m (0.017ohm/1000 ft)

Return Loss (VSWR) Performance

Standard

Phase Stabilized

Phase matched cables and assemblies are available upon request.

Mechanical Specifications

Cable Weight

7.5kg/m (5lb/ft)

Minimum Bending Radius

800mm (31in)

Minimum Bending Radius

1500mm (59in)

Bending Moment

580 (428)

Tensile Strength

4000N (900lb)

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	0.015	0.005	1890
1	0.021	0.006	1330
1.5	0.026	0.008	1090
2	0.03	0.009	940
10	0.067	0.021	418
20	0.096	0.029	294
30	0.118	0.036	239
50	0.153	0.047	184
88	0.205	0.062	138
100	0.219	0.067	129
108	0.228	0.069	124
150	0.27	0.082	105
174	0.292	0.089	97.7
200	0.314	0.096	91.1
300	0.39	0.119	74
400	0.455	0.139	64
450	0.485	0.148	60.3
500	0.513	0.156	57.2
512	0.52	0.158	56.5
600	0.567	0.173	52.2
700	0.616	0.188	48.5
800	0.663	0.202	45.4
824	0.674	0.206	44.7
894	0.706	0.215	43