Cable Datasheets


Semi-rigid (with solid dielectric) Cable
Cable Type 54 (421-252-3)
Cut-off Frequency: 19.00 GHz
General
Cable Model No.421-252-3
Cable Code for Cable Assemblies54
Cable MIL-C17 No.M17/129-00001
Cut-off Frequency (GHz)19.00
Electrical
Impedance
(Ohms @ sea level and +25°C)
50 ± 0.5
Velocity of Propagation
(in %, ±2 %)
69.50
Capacitance (in pF/m)95.10
Dielectric Strength
(KVrms @ 60 Hz)
7.00
Max. Operating Voltage
(KVrms @ 60 Hz and sea level)
3.00
Mechanical
Semi-rigid Type
(Dia. in inches)
0.250
Outer Conductor
(Dia. in mm)
6.35
Outer Conductor Materialcopper
Outer Conductor Finishtin-plated
Dielectric
(Dia. in mm)
5.31
Dielectric Materialsolid PTFE
Dielectric Constant~2.0
Center Conductor Materialcopper
Center Conductor Finishsilver-plated
Center Conductor
(Dia. in mm)
1.63
Weight
(grams/m)
156.00
Minimum Bend Radius,
Inside, Static (mm)
9.50
Environmental
Operating Temperature Range
(°C)
-40 to +90
Characteristics:
Additional Information:

Comparison of regular PTFE and low-density PTFE:
  Regular
PTFE Dielectric
Low-density
Dielectric
Mechanical Stability
vs.
Temperature
Poor

Good

Lower coefficient of thermal expansion results in improved dimensional stability from -100°C to +250°C.

Phase Stability
vs.
Temperature
Poor

Good

Lower coefficient of thermal expansion results in lower Phase Shift vs. Temperature.

Change in Propagation Time
vs.
Temperature
Poor

Improved

The change in propagation time 70 - 80% less than when using solid PTFE.

Attenuation Higher

Lower

Lower dissipation factor of the dielectric, lower dielectric constant, larger center conductor result in lower attenuation.

Power Handling Lower

Higher

Good temperature stability allows higher operating temperature, and therefore higher power.

Weight Higher

Lower

Low density dielectric results in lower weight.

Attenuation & Power Graph:
Attenuation & Power Grapg for Semi-rigid Cables

Spectrum Elektrotechnik GmbH | Olschewskibogen 1 | 80935 Munich, Germany
www.spectrum-et.com | sales@spectrum-et.com | +49 (0)89 / 354 804-0 | +49 (0)89 / 354 804-90
Specifications are subject to change without notice.
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