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trb316-triaxial-cable---50-ohm-guarded-coax, trb316-triaxial-cable---50-ohm-guarded-coax, /triaxial-coaxial-cable
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Certifications: ISO/CE Certified Quality
Technical Advantage: Active Guarding Tech Eliminates Leakage
Material & Craft: Silver-Plated Copper & PTFE Construction
The TRB316 triaxial cable produced by Zhenjiang Worldpeak Communication Co., Ltd. is a high-precision 50 ohm guarded coaxial cable engineered for high-isolation, ultra-low-current test setups. Constructed with a concentric dual-shield layout, the TRB316 triaxial cable routes stray signals away from the center conductor while eliminating dielectric leakage. Featuring a robust 4.50 mm FEP jacket and high-purity PTFE dielectric insulation, this low noise measurement cable ensures continuous operational reliability across thermal extremes from -55°C to +200°C.
Designed for semiconductor parametric testing, high-impedance electrometers, and sensitive research instrumentation, the TRB316 guarded cable provides femtoamp-level signal integrity. Zhenjiang Worldpeak Communication Co., Ltd. delivers custom TRB316 triaxial cable configurations for demanding B2B OEM requirements globally.
The TRB316 triaxial cable offers high performance for measurement environments where standard coaxial cabling proves insufficient. Standard coaxial lines consist of a single conductor and one shield, making them vulnerable to dielectric leakage. In contrast, the TRB316 triaxial cable features a multi-layer design with two isolated silver-plated copper shields separated by high-grade PTFE dielectric layers.
At the center of the TRB316 guarded cable is a 7 x 0.10 mm silver-plated copper-clad steel (SPCCS) conductor, optimized to maintain a true 50 ohm characteristic impedance with strong mechanical durability. The inner PTFE dielectric layer insulates the signal conductor from the inner silver-plated copper shield braid. When driven by active guarding instrumentation, this inner shield maintains the same electrical potential as the center conductor.
Surrounding the inner guard braid is a secondary outer PTFE dielectric layer, covered by a dense outer silver-plated copper braid shield and a durable 4.50 mm FEP outer jacket. Because the inner shield and signal conductor share equal potential, the voltage drop across the primary dielectric drops to near zero. This design neutralizes internal leakage current paths, allowing test engineers to record stable low-current data without signal degradation or stray electrical interference.
Precision Dual-Shield Guarded Architecture: The TRB316 triaxial cable features a dual-braid concentric design that isolates the center conductor to prevent current leakage during high-sensitivity measurements.
Low Noise Measurement Performance: As a specialized low noise measurement cable, the TRB316 guarded cable reduces triboelectric charge generation caused by bending or mechanical vibration.
Thermal and Chemical Resilience: Outfitted with premium PTFE internal insulation and a chemically resistant 4.50 mm FEP outer jacket to preserve dielectric performance across -55°C to +200°C.
50 Ohm Impedance Matching: Designed for RF low-current test systems, Source-Measure Units (SMUs), electrometers, and precision laboratory instruments requiring a 50 ohm triaxial cable interface.
Universal Connector Interfacing: Compatible with industry-standard 3-Lug TRB connectors, 2-Lug Twinax systems, and BNC triax interfaces for seamless equipment integration.
Rugged Mechanical Construction: Built with an outer diameter of 4.50 mm and a minimum bend radius of 23 mm to ensure reliable cable handling without compromising internal shield spacing.
| Parameter | Specification | Functional Notes |
| Product Model | TRB316 Triaxial Cable | Zhenjiang Worldpeak Communication Co., Ltd. |
| Impedance | 50 Ohm | Characteristic System Impedance |
| Inner Conductor | 7 x 0.10 mm SPCCS | High-flexibility center signal wire |
| Inner Dielectric | 1.52 mm PTFE | Primary dielectric layer |
| Inner Shield | 1.95 mm Silver-Plated Copper Braid | Active driven guard shield braid |
| Outer Dielectric | 2.95 mm PTFE | Secondary isolation dielectric layer |
| Outer Shield | 3.60 mm Silver-Plated Copper Braid | External EMI grounding shield |
| Outer Jacket | 4.50 mm FEP | Protective mechanical jacket |
| Velocity of Propagation | 70% | Nominal propagation rate |
| Capacitance | 95 pF/m | Reference cable capacitance |
| Attenuation @ 100 MHz | 45 dB/100m | Low-frequency signal loss rating |
| Attenuation @ 400 MHz | 95 dB/100m | High-frequency signal loss rating |
| Operating Temperature | -55°C to +200°C | Extreme thermal stability rating |
| Minimum Bend Radius | 23 mm | Structural flexibility threshold |
| Nominal Cable Weight | 0.035 kg/m | Robust physical profile |
In standard coaxial cables, a voltage differential exists between the signal conductor and the grounded outer braid. This voltage difference causes tiny leakage currents to flow through the cable dielectric material. In sub-nanoamp applications, this leakage masks actual signal readings. The TRB316 triaxial cable eliminates this error through active guarding. By connecting the inner shield of the TRB316 guarded cable to a guard buffer at equal potential, zero voltage drop occurs across the primary PTFE layer, reducing leakage currents down to femtoamp levels.
Twinaxial cables feature two center conductors inside a single shield and are designed for differential signal processing. In contrast, the TRB316 triaxial cable features one center conductor surrounded by two isolated concentric shields. Twinax cables serve high-speed balanced signal applications, whereas the TRB316 triaxial cable is designed for guarded, single-ended low-current measurement setups.
Physical movement of test cables creates friction between internal insulation and shield braids, generating static charges known as triboelectric noise. As a low noise measurement cable, the TRB316 guarded cable utilizes stable PTFE interfaces and tight mechanical tolerances that reduce static charge buildup. This ensures clean signal delivery even when the cable flexes during manual probing or automated testing.
Semiconductor Parametric Testing: Links Source-Measure Units (SMUs) to wafer probe stations, enabling femtoamp-level current-voltage (I-V) testing without cable dielectric interference.
High-Impedance Electrometer Connections: Functions as a 50 ohm triaxial cable interconnect for electrometers and sub-picoammeters where input bias currents must be controlled.
Capacitance-Voltage (C-V) Characterization: Acts as a low noise measurement cable for C-V meters measuring semiconductor junction capacitance across high frequencies.
Research & Physics Laboratories: Provides guarded signal routing for physics, materials testing, and nanotechnology experiments requiring maximum shield isolation.
Zhenjiang Worldpeak Communication Co., Ltd. provides complete OEM manufacturing and technical support for instrument builders, B2B distributors, and system integrators worldwide:
Custom Assembly Configuration: Zhenjiang Worldpeak Communication Co., Ltd. manufactures complete factory-terminated assemblies with 3-Lug TRB, BNC triax, or customized connector types built to exact length specifications.
Comprehensive Quality Control: Every TRB316 triaxial cable assembly produced by Zhenjiang Worldpeak Communication Co., Ltd. undergoes isolation resistance testing between shield layers to verify guard integrity.
Industrial Packaging & Supply Chain: Zhenjiang Worldpeak Communication Co., Ltd. provides anti-static individual packaging, custom spooling options, and sequential meter markings to streamline volume integration.
A: The TRB316 triaxial cable features an additional inner shield layer that acts as an active guard. When driven at the same electrical potential as the center conductor, the TRB316 guarded cable eliminates dielectric leakage currents, making it essential for sub-nanoamp measurements.
A: The TRB316 triaxial cable works with standard 3-Lug TRB, 2-Lug Twinax, and BNC triax connectors designed for low-noise instrumentation.
A: Connect the inner shield of the TRB316 triaxial cable to the guard terminal of the instrument and the outer shield braid to chassis ground. Connecting the inner guard directly to ground disables the guarding function.
A: Yes, Zhenjiang Worldpeak Communication Co., Ltd. offers full OEM customization, including tailored lengths, custom jacket markings, anti-static packaging, and pre-tested connector combinations.
