0.047" Semi-Rigid Test Probe 50 Ohm Non-Magnetic UT-047C Alternative RF Test Cable

This SR-047C 0.047 inch (1.19mm) non-magnetic semi-rigid test probe serves as a direct UT-047C alternative coaxial cable, featuring seamless copper tube construction with zero ferrous content throughout. Unlike standard semi-rigid cables that use copper-clad steel center conductors, this UT-047C replacement utilizes a silver-plated copper center conductor verified non-magnetic, ensuring no magnetic interference in sensitive applications such as MRI systems, quantum computing cryostats, and precision metrology equipment . The PTFE dielectric delivers 70% velocity of propagation with capacitance of 95.2 pF/m, while the copper tube provides 100% RF shielding with effectiveness exceeding 120 dB. Operating frequency extends to 90 GHz with insertion loss of 8.0 dB/m at 40 GHz and 12.8 dB/m at 90 GHz, and voltage rating of 3000V RMS supports high power applications. This non-magnetic hardline cable is RoHS compliant and suitable for cryogenic test fixtures, quantum device characterization, and MRI-compatible electronics where magnetic purity is essential.

• UT-047C alternative – form-fit-function equivalent with identical 0.047" (1.19mm) outer diameter and 50 Ohm impedance, compatible with all standard UT-047C connector tooling
• 100% non-magnetic construction – silver-plated copper center conductor (no steel), copper tube outer conductor, and PTFE dielectric, verified zero ferrous content for MRI and quantum applications
• Seamless copper tube – provides 100% RF shielding, eliminating signal leakage in multi-channel arrays
• 90 GHz frequency capability – specified through 90 GHz with usable performance for millimeter wave applications
• 3000V RMS voltage rating – withstands 3000V at 60Hz, suitable for high power device characterization
• 70% velocity of propagation – low-density PTFE dielectric with 95.2 pF/m capacitance for reduced attenuation
• Silver-plated copper center conductor – 0.287mm diameter with high-purity copper, verified non-magnetic while maintaining excellent conductivity
• 0.125 inch (3.175mm) bend radius – formable for tight routing in test fixtures and compact cryostat layouts
• Cryogenic compatible – maintains performance at 4K temperatures, suitable for quantum computing dilution refrigerators
• -55°C to +150°C temperature range – withstands extreme environments from deep cryogenic to high-temperature processing
• Custom lengths – cut to exact specifications for prototype through production quantities
• Connector options – bare ends for direct PCB solder, SMA through 26 GHz, 2.92mm through 40 GHz, SMP for blind-mate applications
• 10 meter minimum order – low MOQ for research institutions and test fixture development

• Quantum computing cryostats – Non-magnetic construction for qubit control and readout lines in dilution refrigerator systems at millikelvin temperatures
• MRI receive coil arrays – Zero ferrous content eliminates image artifacts in high-field 7T and above MRI systems where magnetic materials distort field homogeneity
• Cryogenic device test fixtures – Internal wiring for semiconductor characterization at 4K temperatures with reduced thermal conductivity options
• VNA test fixtures – Signal paths within custom test enclosures requiring non-magnetic materials for accurate device characterization up to 90 GHz
• Quantum sensing instrumentation – RF delivery to vapor cells and ion traps where Zeeman shifts would degrade measurement precision
• Semiconductor parametric testers – Low-temperature device characterization for quantum computing and advanced node research
• Medical linear accelerators – RF monitoring ports where magnetic materials would distort primary beam and affect treatment delivery accuracy
• Spaceborne magnetometers – Internal RF interconnects near sensor heads requiring absolutely zero magnetic interference
• Metrology and calibration – Reference standards and calibration fixtures for primary magnetic field measurements
• High reliability defense electronics – Non-magnetic cable for systems requiring immunity to magnetic interference in sensitive environments

A: The critical difference is the center conductor material. Standard 0.047" semi-rigid coaxial cables use copper-clad steel (SCCS) for mechanical strength, which introduces magnetic susceptibility. SR-047C uses a silver-plated copper center conductor with no ferrous content, verified non-magnetic for MRI, quantum research, and precision instrumentation applications.

A: SR-047C specified through 90 GHz with usable performance across the entire millimeter wave spectrum. At 40 GHz, insertion loss is 8.0 dB/m; at 65 GHz, approximately 10.6 dB/m, suitable for short internal fixture paths under 100mm.

A: Maximum operating voltage is 3000V RMS at 60 Hz, supporting high power device characterization and breakdown voltage measurements.

A: Standard operating temperature is -55°C to +250°C. For quantum computing applications at millikelvin temperatures, the all-copper construction performs reliably, with optional cupronickel or beryllium copper conductor materials available for reduced thermal conductivity.

A: Minimum static bend radius is 0.125 inches (3.175 mm). For consistent results in cryostat integration or test fixture layouts, use radiused forming tools matched to the desired bend radius. For complex shapes, we recommend ordering pre-formed cables to your mechanical drawing.

A: Yes. The all-metal construction with PTFE dielectric is compatible with UHV applications down to 10⁻¹¹ torr. The materials have low outgassing rates and can be baked to 150°C for vacuum conditioning. We offer cleaned and vacuum-baked versions for cryostat integration.

A: 10 meters minimum order. This low MOQ supports quantum research, medical device prototyping, and test fixture development where non-magnetic is required but volume is limited.