0.250" SF

0.250" semi flexible coaxial cable layers

Cable Group

Attenuation @ 1000 MHz

0.25 dB/m

Impedance

50 Ω

Inner Conductor

Silver Plated Copper

Dielectric Material

Outer Conductor

Tin Soaked Copper Braid

Overview

0.250" Semi-Flexible coaxial cable is a formable, microwave grade with mode free operation to 19 GHz. The tin-soaked copper braid provides near 100% RF shielding and the malleable nature of the outer jacket eliminates solder joint failures and allows bends immediately behind the fillet. Standard 0.250" SF cables do not have a jacket/sheath, but most manufacturers provide a jacketed variation identifiable by its bright blue jacket.

Semi-flex cables are dimensionally and electrically similar to their semi-rigid counterparts and have a tinned-copper-braid outer shielding that provides RF shielding greater than 100 dB. The hand-formable cable assemblies do not require special tooling to shape or reshape the assemblies and can be formed more than once without damaging the outer conductor.

Typical Electrical Specifications Typical Mechanical Specifications
Operating frequency range DC to 19 GHz Inner conductor (mm) 1.63
Capacitance (pF/m) 95 Dielectric (mm) 5.27
Velocity of propagation (%) 70 Outer conductor (mm) 6.20
Shielding effectiveness (dB) 100 Jacket (mm) -
Maximum operating voltage (KVrms) 3.5 Operating temperature -55 to +125 °C