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trb142-triaxial-cable---50-ohm-guarded-coax, trb142-triaxial-cable---50-ohm-guarded-coax, /triaxial-coaxial-cable
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Tech Advantage: 50Ω active guarding eliminates dielectric leakage.
Materials: Solid SPCCS core, double PTFE, durable FEP jacket (-55°C to +200°C).
Application & Users: Designed for engineers doing semiconductor parametric and electrometer testing.
The TRB142 triaxial cable manufactured by Zhenjiang Worldpeak Communication Co., Ltd. is a high-precision TRB142 guarded cable engineered for low-noise instrumentation and semiconductor parametric testing. Featuring a dual-shield design, this 50 ohm triaxial cable utilizes an inner guard shield driven at the same electrical potential as the center conductor, effectively eliminating dielectric leakage current. With a solid SPCCS center conductor, double PTFE insulation, and a 6.20 mm FEP outer jacket, the TRB142 triaxial cable ensures optimal signal isolation across operating temperatures from -55°C to +200°C. Ideal for SMU setups and electrometers, this guarded coaxial cable delivers femtoamp-level measurement accuracy for critical testing applications.
Precision testing environments require specialized transmission interconnects to prevent microscopic current leakage from degrading critical test data. The TRB142 triaxial cable produced by Zhenjiang Worldpeak Communication Co., Ltd. provides an advanced dual-shielded architecture designed specifically to address the demanding performance requirements of femtoamp-level measurements, electrometer instrumentation, and semiconductor characterization.
Standard single-shield coaxial cables allow signal leakage across their dielectric layers when measuring sub-nanoampere currents. In contrast, the TRB142 triaxial cable incorporates an inner silver-plated copper braid shield separated from the center conductor by high-purity 2.95 mm PTFE insulation. When this inner shield functions as a driven guard, the voltage potential across the inner dielectric drops to near zero, preventing leakage currents from interfering with signal acquisition.
The outer 4.50 mm PTFE dielectric layer isolates the inner guard shield from a second 5.30 mm silver-plated copper braid shield. This outer shield connects to system ground, forming a robust barrier against electromagnetic interference (EMI) while serving as a secure return path for guard currents. Encased in a durable 6.20 mm FEP jacket, the TRB142 triaxial cable withstands aggressive chemical environments, mechanical stress, and thermal fluctuations ranging from -55°C to +200°C. Zhenjiang Worldpeak Communication Co., Ltd. provides this low noise measurement cable to ensure stable signal integrity, ultra-low parasitic capacitance, and long-term reliability in sensitive laboratory and industrial environments.
Dual-Shield Construction: Features dual silver-plated copper braid shields separated by high-grade PTFE dielectric layers for active guarding and EMI shielding.
Effective Leakage Elimination: Designed so the inner shield can be driven at signal potential, eliminating voltage gradients and dielectric leakage current.
High Thermal Stability: Constructed with premium PTFE insulation and a durable FEP jacket to operate reliably from -55°C to +200°C.
Low Noise Performance: Optimized materials minimize dielectric absorption and mechanical noise, making it a dependable low noise measurement cable.
Precise 50 Ohm Impedance: Matches standard high-frequency test instrumentation, reducing reflection errors during dynamic testing.
Broad Connector Compatibility: Engineered for seamless termination with standard 3-lug TRB and 2-lug Twinax connector interfaces.
| Parameter | Specification | Engineering Details |
| Primary Keyword | TRB142 triaxial cable | Precision TRB142 guarded cable |
| Impedance | 50 Ohm | Characteristic impedance |
| Inner Conductor | 0.94 mm Solid SPCCS | Silver-plated copper-clad steel core |
| Inner Dielectric | 2.95 mm PTFE | Primary center conductor isolation |
| Inner Shield | 3.58 mm Silver-Plated Copper Braid | Active guard shield |
| Outer Dielectric | 4.50 mm PTFE | Isolation between guard and ground |
| Outer Shield | 5.30 mm Silver-Plated Copper Braid | Environmental EMI ground shield |
| Outer Jacket | 6.20 mm FEP | Protective mechanical jacket |
| Velocity of Propagation | 70% | Reference propagation velocity |
| Capacitance | 95 pF/m | Low parasitic capacitance |
| Attenuation @ 100 MHz | 22 dB/100m | Signal attenuation specification |
| Attenuation @ 400 MHz | 48 dB/100m | High-frequency loss factor |
| Operating Temperature | -55°C to +200°C | Extended thermal operating limit |
| Minimum Bend Radius | 32 mm | Mechanical flexibility threshold |
| Cable Weight | 0.065 kg/m | Bulk cable density |
| Connector Support | 3-Lug TRB, 2-Lug Twinax | Standard industry interfaces |
In low-current testing, the insulation resistance of standard cable dielectrics allows tiny leakage currents to flow from the signal conductor to ground. The TRB142 triaxial cable manufactured by Zhenjiang Worldpeak Communication Co., Ltd. eliminates this error mechanism using a driven guard setup. An instrumentation amplifier drives the inner guard shield to the exact electrical potential of the center conductor. Because the potential difference across the inner PTFE dielectric becomes zero, leakage current cannot flow out of the signal path. The outer shield of the 50 ohm triaxial cable remains grounded, redirecting external noise currents harmlessly to earth.
TRB142 Triaxial Cable vs. Standard Coaxial Cable: A coaxial cable features a single conductor and one braid shield, leaving it vulnerable to dielectric leakage currents when evaluating sub-picoamp signals. The guarded coaxial cable architecture of the TRB142 triaxial cable provides a secondary guard layer, reducing dielectric leakage by several orders of magnitude.
TRB142 Triaxial Cable vs. Twinaxial Cable: Twinax cables contain two internal conductors within a single shield to carry differential signals. The TRB142 triaxial cable utilizes a single center conductor surrounded by two concentric shields, making it specifically suited for guarded single-ended high-impedance testing rather than differential data transmission.
Semiconductor Parametric Testing: Provides high-isolation connections between source-measure units (SMUs) and wafer probe stations, preventing cable leakage during sub-picoamp characterization.
High-Impedance Voltage Measurements: Connects electrometers and high-input-impedance voltmeters, preventing dielectric leakage errors in sensitive material research.
Capacitance-Voltage (C-V) Characterization: Serves as a low-noise interconnect for measuring semiconductor junction capacitance, where stable cable parasitics are necessary for accurate readings.
Research Laboratory Instrumentation: Used in advanced physics, materials science, and bio-electronic research requiring maximum isolation between low-level signal lines and ground.
Partnering with Zhenjiang Worldpeak Communication Co., Ltd. delivers comprehensive technical advantages and commercial flexibility for B2B system integrators and equipment manufacturers:
Factory Assembly Services:Zhenjiang Worldpeak Communication Co., Ltd. supplies pre-terminated TRB142 triaxial cable assemblies fitted with 3-lug TRB connectors, BNC triax adapters, or custom interface options.
Rigorous Quality Verification: Every low noise measurement cable assembly produced by Zhenjiang Worldpeak Communication Co., Ltd. undergoes complete shield isolation testing to confirm high isolation resistance between the inner guard shield and outer ground shield.
OEM Customization Options:Zhenjiang Worldpeak Communication Co., Ltd. supports custom cable lengths, specialized reel packaging, jacket color coding, and sequential length marking for OEM volume orders.
A TRB142 guarded cable allows the inner shield to be driven at the same electrical potential as the center signal conductor. This eliminates the voltage gradient across the primary dielectric, stopping leakage currents from corrupting measurements below 1 nA.
The TRB142 triaxial cable manufactured by Zhenjiang Worldpeak Communication Co., Ltd. is fully compatible with standard 3-lug TRB connectors and 2-lug Twinax interfaces used in precision measurement systems.
Maintain a minimum bend radius of 32 mm during installation to protect the internal PTFE layers of the 50 ohm triaxial cable. Additionally, ensure the inner shield connects strictly to the instrument guard terminal rather than ground, while the outer shield terminates to instrument ground.
