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 | Copper Tube |
| Impedance | 50 Ohm |
| Capacitance | 95.2 pF/m |
| Outer Diameter | 0.250'' (6.350mm) |
| Brand Name | Bing Wire & Cable |
| Model Number | SR-250C |
| 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 | Copper Tube |
| Impedance | 50 Ohm | Capacitance | 95.2 pF/m |
| Outer Diameter | 0.250'' (6.350mm) | Brand Name | Bing Wire & Cable |
| Model Number | SR-250C | Certification | ISO, RoHS, SGS |
| Place of Origin | Shanghai, China |
SR‑250C semi‑rigid rf cable is a 0.250", 50‑ohm, non‑magnetic coax cable engineered for very high power and low loss applications over extended distances. Its large outer diameter, solid‑metal construction, and carefully controlled dielectric system minimize attenuation and VSWR, making it ideal for backbone RF feeds, high‑duty transmit paths, and mission‑critical links. By using non‑magnetic metals throughout, SR‑250C maintains a negligible magnetic signature, which is essential in MRI/NMR suites, scientific facilities, and environments with strong or carefully controlled magnetic fields. The cable’s semi‑rigid design supports precise forming, excellent shielding, and stable electrical performance even under thermal cycling and vibration, enabling robust installations in demanding industrial and defense systems.
0.250" 50‑ohm semi‑rigid rf cable for extremely low attenuation and high continuous‑wave power handling.
Non‑magnetic conductors and outer tube for use around strong magnets and magnetically sensitive instrumentation.
High‑performance dielectric optimized for low loss, low dispersion, and predictable phase over frequency.
Outstanding shielding effectiveness, supporting high isolation and low emissions in dense RF environments.
Excellent impedance control along the entire length to maintain low return loss at high frequencies.
Rugged, all‑metal construction for fixed installations exposed to shock, vibration, or harsh temperatures.
Suitable for precision pre‑forming, with repeatable routing through gantries, racks, and long cable trays.
Compatible with heavy‑duty connector interfaces designed for 0.250" semi‑rigid and high‑power terminations.
| Item | Material | Diameter (in) | Diameter (mm) |
|---|---|---|---|
| Centre Conductor | Silver Plated Copper | 0.0641 | 1.6281 |
| Dielectric | Solid PTFE | 0.209 | 5.309 |
| Outer Conductor | Copper Tube | 0.250 +/- 0.001 | 6.350 +/- 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 | 1780.0 |
| 1.00 | 0.21 | 914.8 |
| 5.00 | 0.57 | 364.5 |
| 10.00 | 0.89 | 238.3 |
| 18.00 | 1.31 | 163.2 |
| 26.5 | ---- | ---- |
| 40.00 | ---- | ---- |
| 50.00 | ---- | ---- |
| 65.00 | ---- | ---- |
| 90.00 | ---- | ---- |
High‑Power Transmit and Feed Networks – Use SR‑250C semi-rigid rf cable in transmitter output lines, combiners, and distribution networks where high RF power, low loss, and reliability are crucial.
MRI / NMR Infrastructure Cabling – Ideal for non‑magnetic RF trunks between equipment rooms, magnet rooms, and control consoles, preserving SNR and avoiding magnetic interference.
Broadcast and Communication Backbones – Suitable for main RF feeds in broadcast transmitters, high‑capacity repeaters, and fixed communication links that demand low insertion loss.
Radar and Electronic Warfare Systems – Deployed in radar feed chains, phased‑array manifolds, and EW equipment where long, high‑power runs must maintain amplitude and phase integrity.
Accelerator and Scientific Installations – Excellent for RF supply lines in particle accelerators, fusion projects, and large‑scale research labs with strict magnetic cleanliness requirements.
Metrology‑Grade Reference Lines – Used as stable reference paths in calibration labs and power‑standard setups, supporting accurate measurements over long cable lengths.
Engineered Pre‑Formed Cable Harnesses – Well‑suited for custom multi‑branch harnesses with defined routing, matched electrical lengths, and repeatable production line assembly.
A: Select SR‑250C when your design calls for very high power, very low insertion loss, or long cable runs where smaller diameters would introduce too much attenuation or heating. It is particularly beneficial as a trunk or backbone cable feeding multiple downstream nodes.
A: SR‑250C is constructed using non‑magnetic metal alloys and finishes, making it suitable for applications where ferromagnetic materials would distort fields or be attracted by strong magnets. This makes the semi-rigid rf cable a good fit for MRI, NMR, and specialized scientific equipment.
A: Due to the larger diameter and thicker wall, SR‑250C semi-rigid rf cable requires a larger minimum bend radius and more substantial forming tools than 0.086" or 0.120" cables. It is best used in planned, relatively gentle routing paths rather than tight, compact layouts.
A: Yes. The low‑loss, stable construction supports excellent phase repeatability, and you can specify matched‑length or phase‑matched assemblies for multi‑channel systems. For highly phase‑sensitive arrays, provide detailed electrical requirements at the design stage.
A: When sending an RFQ, include cable type (SR‑250C), required length or cut list, connector types and genders, target frequency range and maximum power, environmental conditions (temperature, vibration, indoor/outdoor, vacuum if applicable), and any pre‑forming drawings or 3D models. If you require phase matching or special testing, note these as well.
A: In many cases, yes, when paired with appropriate connectors, sealing, and mechanical protection. For outdoor routes, consider environmental sealing, strain relief, and mounting hardware to prevent moisture ingress and mechanical damage.
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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