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trc-75-2-triaxial-cable---75-ohm-guarded-coax, trc-75-2-triaxial-cable---75-ohm-guarded-coax, /triaxial-coaxial-cable
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Certification & Quality: Manufactured by Zhenjiang Worldpeak to international precision standards.
Tech & Material: 75-ohm dual-shielded design with high-purity copper core and premium PE/PVC insulation.
Effect & Application: Eliminates leakage currents for femtoamp-level accuracy; ideal for semiconductor testing, lab research, and engineers.
The TRC-75-2 triaxial cable engineered by Zhenjiang Worldpeak Communication Co., Ltd. is a high-precision, guarded coaxial cable designed specifically for low-noise and high-isolation measurement environments. Featuring a dual-shielded architecture with an inner and outer tinned copper braid, this 75 ohm triaxial cable isolates sensitive signals from parasitic interference and insulation leakage. By enabling a driven guard setup, the TRC-75-2 guarded cable routes unwanted stray currents away from the center conductor, making it a critical low noise measurement cable for semiconductor characterization, electrometer testing, and advanced lab instrumentation demanding femtoamp-level accuracy.
Precision electrical testing requires interconnects that safeguard minute signals from environmental noise and dielectric leakage. The TRC-75-2 triaxial cable meets this challenge through an advanced dual-shielded design. Unlike conventional coaxial options, this 75 ohm triaxial cable incorporates an inner conductor, a primary PE dielectric layer, an inner guard shield, an outer PE dielectric layer, an outer ground shield, and a durable 8.50 mm PVC protective jacket.
In high-impedance setups, standard coax experiences subtle current loss across its insulation. The TRC-75-2 guarded cable eliminates this error mechanism. When connected to precision instrumentation, the inner shield of this guarded coaxial cable is driven to the exact voltage potential of the center conductor. Because the voltage differential across the inner dielectric drops to virtually zero, leakage current is practically eliminated. The outer shield remains at chassis ground, shunting external electromagnetic interference (EMI) away from the measurement loop. Zhenjiang Worldpeak Communication Co., Ltd. manufactures this low noise measurement cable to maintain high signal integrity across delicate test benches.
Dual-Shield Architecture: Built with two independent tinned copper braids to separate active guard signals from external system ground.
75 Ohm Impedance Control: Optimized for stable high-frequency transmission and low reflection in 75 ohm test systems.
Precision Center Conductor: Features a 0.64 mm solid bare copper core for uniform signal propagation and consistent conductivity.
High-Isolation PE Dielectrics: Dual polyethylene insulation layers deliver exceptional dielectric resistance and physical stability across operating temperatures from -25°C to +75°C.
Robust PVC Outer Jacket: An 8.50 mm outer sheath guards internal layers against mechanical wear, chemical exposure, and physical pinching.
| Parameter | Specification | Technical Notes |
| Product Model | TRC-75-2 | Precision TRC-75-2 triaxial cable |
| Impedance | 75 ohm | Nominal characteristic impedance |
| Inner Conductor | 0.64 mm Solid BC | High-purity bare copper core |
| Inner Dielectric | 3.70 mm PE | Primary isolation layer |
| Inner Shield | 4.30 mm Tinned Copper Braid | Active driven guard layer |
| Outer Dielectric | 6.50 mm PE | Secondary layer for shield-to-shield isolation |
| Outer Shield | 7.40 mm Tinned Copper Braid | Ground shield for EMI defense |
| Outer Jacket | 8.50 mm PVC | Flexible protective outer sheath |
| Velocity of Propagation | 66% | Nominal signal propagation speed |
| Capacitance | 67 pF/m | Low-capacitance design |
| Attenuation @ 100 MHz | 22 dB/100m | Reference loss performance |
| Attenuation @ 400 MHz | 48 dB/100m | Reference loss performance |
| Operating Temperature | -25°C to +75°C | Thermal operating envelope |
| Min Bend Radius | 40 mm | Preserves internal dielectric geometry |
| Weight | 0.075 kg/m | Cable mass per meter |
| Connector Compatibility | 3-Lug TRB, BNC Triax | Industry standard triaxial interfaces |
A standard coaxial cable features a single conductor and shield. When measuring micro-ampere or femto-ampere currents, the insulation resistance between the core and shield allows leakage current to bypass the load. The TRC-75-2 triaxial cable addresses this limitation by using a driven inner shield. Because no voltage potential exists between the inner conductor and inner shield, leakage current across the primary PE dielectric drops to zero. Zhenjiang Worldpeak Communication Co., Ltd. supplies this TRC-75-2 guarded cable to achieve accurate low-current readings that standard coaxial cables cannot support.
Twinaxial cables employ two balanced inner conductors inside a single shield, making them ideal for differential digital signals. Conversely, the TRC-75-2 triaxial cable uses a single center conductor surrounded by two concentric shields. This architecture makes this low noise measurement cable superior for single-ended high-impedance sensing, where controlling parasitic leakage is more critical than differential signal balancing.
Semiconductor Parametric Testing: Connects source-measure units (SMUs) to wafer probe stations, eliminating stray currents during femtoamp-level device characterization.
High-Impedance Voltage Measurements: Links electrometers and high-impedance voltmeters where input bias currents through standard cable dielectrics would introduce measurement errors.
Capacitance-Voltage (C-V) Characterization: Provides low-noise interconnects for measuring semiconductor junction capacitance at high frequencies while controlling cable parasitics.
Research & Laboratory Instrumentation: Serves as a versatile guarded coaxial cable for physics experiments, material degradation tests, and high-voltage guarded configurations requiring isolation from noise.
Integrating the TRC-75-2 triaxial cable manufactured by Zhenjiang Worldpeak Communication Co., Ltd. offers compelling operational and financial benefits for original equipment manufacturers (OEMs), test system integrators, and industrial laboratories:
Minimized Measurement Downtime: Premium PE dielectric materials and dual tinned copper braids ensure stable signal integrity, reducing false test failures and re-testing cycles.
Enhanced Wafer Yield Protection: In semiconductor characterization, precise femtoamp measurement resolution prevents misclassifying functional dies, directly boosting production yield.
OEM Customization & Scalability: Zhenjiang Worldpeak Communication Co., Ltd. offers tailored cable assembly services, including custom pre-terminated lengths with 3-lug TRB or BNC Triax connectors, custom jacket labeling, and anti-static packaging options.
Direct Factory Cost Efficiency: Sourcing directly from Zhenjiang Worldpeak Communication Co., Ltd. optimizes supply chain expenses while securing consistent quality compliant with international standards.
A: The TRC-75-2 guarded cable allows the inner shield to be driven at the exact signal potential as the center conductor. This removes the voltage drop across the primary dielectric, eliminating leakage current. For measurements below 1 nA, dielectric leakage in standard coaxial cables creates significant error, making this guarded coaxial cable essential for accurate low-current testing.
A: The TRC-75-2 triaxial cable connects with industry-standard 3-lug TRB connectors and BNC Triax connectors. Zhenjiang Worldpeak Communication Co., Ltd. offers custom pre-terminated assemblies tested for shield isolation between the inner and outer braid layers.
A: Ensure that the inner guard shield is connected directly to the instrument guard terminal rather than chassis ground. The outer shield should be attached to ground for EMI protection. Maintain a minimum bend radius of 40 mm during installation to protect internal PE dielectric layers from physical deformation.
A: Zhenjiang Worldpeak Communication Co., Ltd. provides comprehensive OEM services, including custom cable assembly length, specialized connector termination, anti-static individual packaging, and custom sequential jacket printing for bulk orders.
