RF Cable Assembly Guide cinch.comElectrical Ratings Electrical ratings of a cable assembly are determined by the limiting connector type and cable size. Connector Frequency Dielectric Withstanding Working Voltage Connector Cable GHz Impedance (Ohms) Voltage (Vms) (Vms) MMCX RG-178 50 Ohms 6 GHz 500 Vms 170 Vms RG-316 50 Ohms 6 GHz 500 Vms 170 Vms MCX RG-178 50 Ohms 6 GHz 750 Vms 250 Vms RG-316 50 Ohms 6 GHz 1000 Vms 335 Vms RG-316 DS 50 Ohms 6 GHz 1000 Vms 335 Vms MCX 75 Ohm RG-179 75 Ohms 6 GHz 1000 Vms 335 Vms BELDEN 735A 75 Ohms 6 GHz 1000 Vms 335 Vms SMA RG-178 50 Ohms 12.4 GHz 500 Vms 170 Vms RG-316 50 Ohms 12.4 GHz 750 Vms 250 Vms RG-316 DS 50 Ohms 12.4 GHz 750 Vms 250 Vms RG-58 50 Ohms 12.4 GHz 1000 Vms 335 Vms RG-142 50 Ohms 12.4 GHz 1000 Vms 335 Vms Hand Formable .086 50 Ohms 26.5 GHz 1000 Vms 335 Vms Hand Formable .141 50 Ohms 26.5 GHz 1500 Vms 500 Vms SMB RG-178 50 Ohms 4 GHz 750 Vms 250 Vms RG-316 50 Ohms 4 GHz 1000 Vms 335 Vms SMB Mini 75 Ohm RG-179 75 Ohms 2 GHz 1000 Vms 335 Vms RG-179 DS 75 Ohms 2 GHz 1000 Vms 335 Vms BELDEN 735A 75 Ohms 2 GHz 1000 Vms 335 Vms BNC RG-58 50 Ohms 4 GHz 1500 Vms 500 Vms BELDEN 8218 50 Ohms 4 GHz 1500 Vms 500 Vms RG-59 50 Ohms 4 GHz 1500 Vms 500 Vms RG-59 PLENUM 50 Ohms 4 GHz 1500 Vms 500 Vms BNC True 75 Ohm BELDEN 8218 75 Ohms 3 GHz 1500 Vms 500 Vms RG-59 75 Ohms 3 GHz 1500 Vms 500 Vms BELDEN 8281 75 Ohms 3 GHz 1500 Vms 500 Vms COMM SCOPE 735 75 Ohms 3 GHz 1500 Vms 500 Vms BELDEN 735A 75 Ohms 3 GHz 1500 Vms 500 Vms BELDEN 734A 75 Ohms 3 GHz 1500 Vms 500 Vms BELDEN 1694A 75 Ohms 3 GHz 1500 Vms 500 Vms N Type RG-58 50 Ohms 11 GHz 1500 Vms 500 Vms RG-142 50 Ohms 11 GHz 1500 Vms 500 Vms RG-8 50 Ohms 11 GHz 1500 Vms 500 Vms RG-213 50 Ohms 11 GHz 1500 Vms 500 Vms Cable Length Tolerence Standard Cable Length Cable Tolerence Metric Cable Length Cable Tolerence 0.3 m +25 mm - 6 mm 1 ft +1 in - 0.25 in >0.3 m - 1.5 m +50 mm - 25 mm >1 ft - 5 ft +2 in - 1 in >1.5 m - 3 m +100 mm - 50 mm >5 ft - 10 ft +4 in - 2 in >3 m - 7.5 m +150 mm - 75 mm >10 ft - 25 ft +6 in - 3 in >7.5 m +2 % - 1 % >25 ft +2 % - 1 % 2 Metric assemblies available, highlighted in blue