Shanghai Bing Wire & Cable Co., Ltd.
| Payment Terms | T/T,Western Union,Paypal |
| Supply Ability | 5000ft 7days |
| Delivery Time | 7-15 work days |
| Cable family | Semi-Rigid Cable |
| Center Conductor | Silver Plated Copper |
| Conductor Type | Solid |
| Dielectric | Solid PTFE |
| Outer Conductor | Silver Plated Copper Tube |
| Impedance | 50 Ohm |
| Capacitance | 29.0 pF/ft |
| Outer Diameter | 0.250'' (6.350mm) |
| Brand Name | Bing Wire & Cable |
| Model Number | SR-250C-SP |
| Certification | ISO, RoHS, SGS |
| Place of Origin | Shanghai, China |
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Product Specification
| Payment Terms | T/T,Western Union,Paypal | Supply Ability | 5000ft 7days |
| Delivery Time | 7-15 work days | Cable family | Semi-Rigid Cable |
| Center Conductor | Silver Plated Copper | Conductor Type | Solid |
| Dielectric | Solid PTFE | Outer Conductor | Silver Plated Copper Tube |
| Impedance | 50 Ohm | Capacitance | 29.0 pF/ft |
| Outer Diameter | 0.250'' (6.350mm) | Brand Name | Bing Wire & Cable |
| Model Number | SR-250C-SP | Certification | ISO, RoHS, SGS |
| Place of Origin | Shanghai, China |
SR-250C-SP stands apart as a high-capacity 0.250" (6.35mm) 50-ohm semi-rigid coaxial cable specifically engineered for long-haul, high-power RF transmission lines in non-magnetic environments, featuring silver-plated copper outer conductor that delivers exceptional skin effect performance with ultra-low attenuation (0.57 dB/m @ 5 GHz) and 653.3W CW power handling at 1 GHz for mission-critical backbone infrastructure. Unlike smaller 0.141" non-magnetic cables optimized for moderate runs or compact modules, SR-250C-SP targets primary RF trunks spanning equipment rooms, transmitter halls, and antenna vaults where maximum power throughput and minimum loss over 50+ foot distances determine system efficiency. The non-magnetic construction ensures zero interference with MRI magnets, particle accelerators, or precision scientific fields, while precision ±0.5Ω impedance control, PTFE dielectric (70% VOP), and 16.8kV RMS voltage rating support demanding broadcast, radar transmitter output stages, and industrial RF processing applications through 19 GHz continuous operation.
Non-magnetic silver-plated copper shield – Optimized for long-run backbone applications in magnetic fields
0.250" high-capacity geometry – 653.3W CW @ 1 GHz, 260.0W CW @ 5 GHz power handling
Ultra-low attenuation – 0.57 dB/m @ 5 GHz, 0.89 dB/m @ 10 GHz for 15+ meter runs
50-ohm ±0.5Ω precision – VSWR <1.15:1 DC-6.5 GHz, phase stable for reference lines
3.175mm minimum bend radius – 0.125" radius for planned infrastructure routing
16.8kV RMS voltage rating – High-power transmit chain and broadcast applications
PTFE dielectric – Extreme environment reliability, -55°C to +100°C operating temperature
Custom OEM assemblies – Low MOQ pre-formed backbone cables from engineering drawings
| Item | Material | Diameter (in) | Diameter (mm) |
|---|---|---|---|
| Centre Conductor | Silver Plated Copper | 0.0641 | 1.6281 |
| Dielectric | Solid PTFE | 0.209 | 5.309 |
| Outer Conductor | Silver Plated Copper Tube | 0.250 +0.002/- 0.001 | 6.350 +0.051/- 0.025 |
| Capacitance (pF/m) | 95.2 |
|---|---|
| Impedance (Ohms) | 50 +/- 0.5 |
| Velocity of Propagation (%) | 70.0 |
| Max. Frequency (GHz) | 19 |
| Max. Voltage @60Hz (V RMS) | 16800 |
| Min. Bend Radius (mm) | 3.175 |
|---|---|
| Weight (kg/100m) | 15.58 |
| Temperature Range (℃) | -55~+100 |
|---|---|
| RoHS | Compliant |
| Frequency (GHz) | Attenuation (dB/m) | Power (Watts cW@20℃) |
|---|---|---|
| 0.50 | 0.14 | 951.8 |
| 1.00 | 0.21 | 653.3 |
| 5.00 | 0.57 | 260.0 |
| 10.00 | 0.89 | 169.8 |
| 18.00 | 1.31 | 116.3 |
| 26.5 | ---- | ---- |
| 40.00 | ---- | ---- |
| 50.00 | ---- | ---- |
| 65.00 | ---- | ---- |
| 90.00 | ---- | ---- |
MRI infrastructure trunks – Primary RF cabling between transmitter rooms and magnet vaults
High-power broadcast – Main feeder lines from kW-class transmitters to antennas
Radar transmit chains – High-power output from magnetrons/TPAs to circulators
Particle accelerator RF – Long distribution lines to klystrons and cavity systems
Industrial RF plants – 50kW+ plasma systems, materials processing backbone
Test range cabling – Permanent high-power reference lines, dummy load feeds
Q: How does SR-250C-SP differ from smaller semi-rigid coaxial cables like 0.141C-SP?
A: SR-250C-SP is designed for 15+ meter backbone runs with 653.3W power handling and 0.21 dB/m loss at 1 GHz, while 0.141C-SP serves shorter module interconnects (<20 ft) with higher attenuation and lower power capacity.
Q: What makes this semi-rigid coaxial cable ideal for high-power transmitter output stages?
A: 16.8kV voltage rating, 653.3W CW handling, ultra-low 0.21 dB/m loss at 1 GHz, and ±0.5Ω impedance control ensure maximum power transfer from kW-class amplifiers to antennas or loads without thermal runaway or reflections.
Q: Can SR-250C-SP be field-formed or requires factory pre-forming?
A: Factory pre-forming recommended due to 0.125" minimum bend radius and infrastructure-scale dimensions. We manufacture from your infrastructure CAD files with precise routing for equipment racks, cable trays, and vault penetrations.
Q: What's the magnetic performance verification process?
A: Non-magnetic certification includes <0.1% attraction testing in 3T fields. Material analysis confirms no ferromagnetic alloys (NiFe, steel) in conductor, shield, or support structures.
Q: What production capabilities support large-scale deployments?
A: Low MOQ prototyping (5 pcs) through high-volume OEM production. 50+ assemblies: 3-4 weeks. Annual supply agreements with dedicated capacity for broadcast/radar infrastructure programs.
Company Details
Business Type:
Trading Company
Year Established:
2005
Total Annual:
12100000- 18600000
Employee Number:
11~50
Ecer Certification：
Verified Supplier
About Us—Shanghai Baiyin Cable Co., Ltd. Since 2005, Shanghai Baiyin Cable Co., Ltd. has specialized in designing and manufacturing high-performance cables for demanding environments. Headquartered in Shanghai, we serve global industries with tailored solutions engineered for reliability, prec... About Us—Shanghai Baiyin Cable Co., Ltd. Since 2005, Shanghai Baiyin Cable Co., Ltd. has specialized in designing and manufacturing high-performance cables for demanding environments. Headquartered in Shanghai, we serve global industries with tailored solutions engineered for reliability, prec...
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