35422-75
Heat Treated FSJ1RK-50B, HELIAX® Superflexible Foam Coaxial
Cable, corrugated copper, 1/4 in, black non-halogenated, fire retardant
polyolefin jacket
Product Classification
Product Type Coaxial wireless cable
Product Brand HELIAX®
Product Series FSJ1-50B
General Specifications
Flexibility Superflexible
Jacket Color Black
Dimensions
Diameter Over Dielectric 4.826 mm | 0.19 in
Diameter Over Jacket 7.62 mm | 0.3 in
Inner Conductor OD 1.905 mm | 0.075 in
Outer Conductor OD 6.35 mm | 0.25 in
Nominal Size 1/4 in
Electrical Specifications
Cable Impedance 50 ohm ±1 ohm
Capacitance 79.4 pF/m | 24.201 pF/ft
dc Resistance, Inner Conductor 9.843 ohms/km | 3 ohms/kft
dc Resistance, Outer Conductor 6.562 ohms/km | 2 ohms/kft
dc Test Voltage 1600 V
Inductance 0.2 µH/m | 0.061 µH/ft
Insulation Resistance 100000 MOhms-km
Jacket Spark Test Voltage (rms) 4000 V
1 – 18000 MHz Page 1 of 5
©2021 CommScope, Inc. All rights reserved. All trademarks identified by ® or ™ are registered trademarks,
respectively, of CommScope. All specifications are subject to change without notice. See www.commscope.com for the
most current information. Revised: December 8, 2020
35422-75
Operating Frequency Band 1 – 18000 MHz
Peak Power 6.4 kW
Velocity 82 %
VSWR/Return Loss
Frequency Band VSWR Return Loss (dB)
680–960 MHz 1.21 20.8
1700–2200 MHz 1.21 20.8
2200–2700 MHz 1.44 15
Attenuation
Frequency (MHz) Attenuation (dB/100 m) Attenuation (dB/100 ft) Average Power (kW)
1.0 0.577 0.176 6.4
1.5 0.707 0.215 6.4
2.0 0.816 0.249 6.4
10.0 1.833 0.559 3.99
20.0 2.6 0.792 2.81
30.0 3.192 0.973 2.29
50.0 4.136 1.261 1.77
85.0 5.419 1.652 1.35
88.0 5.516 1.681 1.33
100.0 5.889 1.795 1.24
108.0 6.125 1.867 1.19
150.0 7.25 2.21 1.01
174.0 7.825 2.385 0.93
200.0 8.408 2.563 0.87
204.0 8.495 2.589 0.86
300.0 10.373 3.162 0.71
400.0 12.051 3.673 0.61
450.0 12.817 3.906 0.57
460.0 12.965 3.952 0.56
500.0 13.545 4.128 0.54
512.0 13.715 4.18 0.53
600.0 14.909 4.544 0.49
700.0 16.175 4.93 0.45
17.362 5.292 0.42 Page 2 of 5
©2021 CommScope, Inc. All rights reserved. All trademarks identified by ® or ™ are registered trademarks,
respectively, of CommScope. All specifications are subject to change without notice. See www.commscope.com for the
most current information. Revised: December 8, 2020
35422-75
800.0 17.362 5.292 0.42
824.0 17.637 5.376 0.41
894.0 18.42 5.614 0.4
960.0 19.134 5.832 0.38
1000.0 19.556 5.96 0.37
1218.0 21.738 6.626 0.34
1250.0 22.044 6.719 0.33
1500.0 24.326 7.414 0.3
1700.0 26.038 7.936 0.28
1794.0 26.813 8.172 0.27
1800.0 26.862 8.187 0.27
2000.0 28.455 8.673 0.26
2100.0 29.227 8.908 0.25
2200.0 29.984 9.139 0.24
2300.0 30.727 9.365 0.24
2500.0 32.174 9.806 0.23
2700.0 33.576 10.233 0.22
3000.0 35.602 10.851 0.21
3400.0 38.183 11.638 0.19
3600.0 39.428 12.017 0.19
3700.0 40.041 12.204 0.18
3800.0 40.647 12.389 0.18
3900.0 41.247 12.571 0.18
4000.0 41.841 12.753 0.17
4100.0 42.429 12.932 0.17
4200.0 43.012 13.11 0.17
4300.0 43.59 13.286 0.17
4400.0 44.163 13.46 0.17
4500.0 44.73 13.633 0.16
4600.0 45.293 13.805 0.16
4700.0 45.852 13.975 0.16
4800.0 46.405 14.144 0.16
4900.0 46.955 14.311 0.16
5000.0 47.5 14.477 0.15
6000.0 52.747 16.077 0.14
62.37 19.01 0.12 Page 3 of 5
©2021 CommScope, Inc. All rights reserved. All trademarks identified by ® or ™ are registered trademarks,
respectively, of CommScope. All specifications are subject to change without notice. See www.commscope.com for the
most current information. Revised: December 8, 2020
35422-75
8000.0 62.37 19.01 0.12
8800.0 65.974 20.108 0.11
10000.0 71.173 21.693 0.1
12000.0 79.393 24.198 0.09
14000.0 87.172 26.569 0.08
15800.0 93.872 28.611 0.08
16000.0 94.601 28.833 0.08
18000.0 101.745 31.01 0.07
Material Specifications
Dielectric Material Foam PE
Jacket Material Non-halogenated, fire retardant polyolefin
Inner Conductor Material Copper-clad aluminum wire
Outer Conductor Material Corrugated copper
Mechanical Specifications
Minimum Bend Radius, multiple Bends 25.4 mm | 1 in
Minimum Bend Radius, single Bend 25.4 mm | 1 in
Number of Bends, minimum 15
Number of Bends, typical 20
Tensile Strength 68 kg | 149.914 lb
Bending Moment 1.1 N-m | 9.736 in lb
Flat Plate Crush Strength 1.8 kg/mm | 100.795 lb/in
Environmental Specifications
Installation temperature -40 °C to +60 °C (-40 °F to +140 °F)
Operating Temperature -40 °C to +60 °C (-40 °F to +140 °F)
Storage Temperature -40 °C to +60 °C (-40 °F to +140 °F)
Attenuation, Ambient Temperature 68 °F | 20 °C
Average Power, Ambient Temperature 104 °F | 40 °C
Average Power, Inner Conductor Temperature 212 °F | 100 °C
Fire Retardancy Test Method UL 1666/CATVR/CMR
Smoke Index Test Method IEC 61034
Toxicity Index Test Method IEC 60754-1 | IEC 60754-2
Page 4 of 5
©2021 CommScope, Inc. All rights reserved. All trademarks identified by ® or ™ are registered trademarks,
respectively, of CommScope. All specifications are subject to change without notice. See www.commscope.com for the
most current information. Revised: December 8, 2020
35422-75
Packaging and Weights
Cable weight 0.07 kg/m | 0.047 lb/ft
Regulatory Compliance/Certifications
Agency Classification
ISO 9001:2015 Designed, manufactured and/or distributed under this quality management system
UL/ETL Certification Compliant
Page 5 of 5
©2021 CommScope, Inc. All rights reserved. All trademarks identified by ® or ™ are registered trademarks,
respectively, of CommScope. All specifications are subject to change without notice. See www.commscope.com for the
most current information. Revised: December 8, 2020
