Home
HCA78-50JFN

HCA78-50JFN
7/8" HELIFLEX^® Air-Dielectric Coaxial Cable, flame retardant/ halogen free jacket

Name: 7/8" HELIFLEX ® Air-Dielectric Coaxial Cable, flame retardant/ halogen free jacket
SKU: HCA78-50JFN

Rev : B | Rev date : 15 Jan 2026

HELIFLEX® 7/8" low loss air dielectric cable

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.

Applications

Wireless Communication

TV & Radio

HF Defense

Mobile Radio

Cable Solutions

Structure

Cable Type

HCA

Size

7/8"

Jacket Option

Indoor

Inner Conductor Material

Copper Tube

Dielectric Material

Helical Polyethylene Spacer

Outer Conductor Material

Corrugated Copper

Jacket Material

Black Polyethylene, Metalhydroxite Filling

Mechanical Specifications

Inner Conductor Diameter

9mm (0.35in)

Dielectric Diameter

20.2mm (0.79in)

Outer Conductor Diameter

25.5mm (1in)

Jacket Diameter

28mm (1.103in)

Cable Weight

0.68kg/m (0.46lb/ft)

Min Bending Radius, Single Bend

100mm (4in)

Min. Bending Radius, Repeated Bends

250mm (10in)

Bending Moment

27 Nm (20 lbf*ft)

Tensile Strength

1,600N (360lb)

Air Volume

0.34l/m (0.0037ft³/ft)

Recommended / Maximum Clamp Spacing

0.5 / 0.9 m (1.8 / 3 ) ft

Electrical Specifications

Impedance

50 +/- 0.5 Ω

Max. Operating Frequency

3 GHz

Velocity

93 %

Capacitance

71pF/m (21.6pF/ft)

Inductance

0.178µH/m (0.054µH/ft)

Peak Power Rating

73 kW

RF Peak Voltage

2,700 V

Jacket Spark

8,000 V RMS

DC-Resistance Inner Conductor

1.1Ω/km (0.34Ω/kft)

DC-Resistance Outer Conductor

0.88Ω/km (0.27Ω/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 stabilized and phase matched cables and assemblies are available upon request.

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)

Attenuation and Power Rating

Frequency, MHz	dB per 100m	dB per 100ft	Power, kW
0.5	0.081	0.025	73
1	0.115	0.035	73
1.5	0.141	0.043	70.9
2	0.163	0.05	61.4
10	0.366	0.112	27.3
20	0.52	0.158	19.2
30	0.638	0.194	15.7
50	0.827	0.252	12.1
88	1.1	0.337	9.11
100	1.18	0.359	8.49
108	1.23	0.374	8.15
150	1.45	0.443	6.92
174	1.57	0.478	6.39
200	1.69	0.514	5.94
300	2.08	0.634	4.84
400	2.42	0.738	4.17
450	2.57	0.785	3.93
500	2.72	0.83	3.71
512	2.76	0.84	3.66
600	3	0.914	3.37
700	3.25	0.992	3.12
800	3.49	1.07	2.91
824	3.55	1.08	2.86
894	3.71	1.13	2.74
900	3.72	1.13	2.74
925	3.78	1.15	2.69
960	3.85	1.17	2.65
1000	3.94	1.2	2.59
1250	4.45	1.36	2.3
1500	4.91	1.5	2.1
1700	5.26	1.6	1.97
1800	5.43	1.65	1.91
2000	5.75	1.75	1.81
2200	6.07	1.85	1.72
2300	6.22	1.9	1.68
3000	7.22	2.2	1.47

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

Related Products

HCH-78-1C Cable hanger for HELIFLEX^® Air-dielectric coaxial cable

Request Quote

Add to my e-catalog

HCA78-50JFN7/8" HELIFLEX® Air-Dielectric Coaxial Cable, flame retardant/ halogen free jacket

Features / Benefits

Technical Features

PDF Datasheet

Related Products

HCA78-50JFN
7/8" HELIFLEX^® Air-Dielectric Coaxial Cable, flame retardant/ halogen free jacket