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

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

Rev : G | Rev date : 15 Nov 2025

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

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

34.8mm (1.37in)

Inner Conductor Material

Corrugated Copper Tube

Dielectric Diameter

75.3mm (2.96in)

Dielectric Material

Helical Polyethylene Spacer

Outer Conductor Diameter

85.5mm (3.36in)

Outer Conductor Material

Corrugated Copper

Jacket Diameter

90.5mm (3.56in)

Jacket Material

Polyethylene, PE, Metalhydroxite Filling

Testing and Environmental

Fire Performance

Flame Retardant, LS0H

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)

Electrical Specifications

Impedance

50 +/- 0.5 Ω

Maximum 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

9700 Volts

Jacket Spark

8000 Volt RMS

Inner Conductor dc Resistance

0.43ohm/1000 m (0.13ohm/1000 ft)

Outer Conductor dc Resistance

0.13ohm/1000 m (0.04ohm/1000 ft)

Return Loss (VSWR) Performance

Standard

Phase Stabilized

Phase stabilized and phase matched cables and assemblies are available upon request.

Mechanical Specifications

Cable Weight

3.1kg/m (2.1lb/ft)

Minimum Bending Radius

380mm (15in)

Minimum Bending Radius

890mm (35in)

Bending Moment

215 (159)

Tensile Strength

1800N (405lb)

Recommended / Maximum Clamp Spacing

0.8 / 1.2 (2.75 / 4)

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

Frequency, MHz	dB per 100m	dB per 100ft	Power, kW
0.5	0.025	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