Overview
High-temperature shielded cables are engineered for extreme environments where standard cables fail. Combining heat-resistant insulation (e.g., PTFE) with conductive shielding (typically braided metal), they prevent signal degradation from EMI while withstanding temperatures exceeding 200°C. These cables are critical in industries like aerospace, where engine compartment wiring demands both thermal endurance and noise immunity. Their construction often involves multiple layers: a high-temp inner insulator, a shielding braid, and an outer jacket for mechanical protection.
Structure and Working Principle
A typical shielded high-temp cable consists of a tinned copper conductor for oxidation resistance, wrapped in PTFE or silicone insulation. Over this, a woven metal shield (aluminum, copper, or stainless steel) reflects EMI, while an outer jacket resists abrasion and chemicals. The shielding works by creating a Faraday cage, diverting electromagnetic interference away from the core conductor. Heat resistance stems from inert materials like PTFE, which maintains dielectric properties even at 260°C. Some variants incorporate fiberglass sleeves for additional thermal protection in furnace applications.
Key Features
1. **Temperature Range**: Rated from -65°C to +500°C for specialized grades, far exceeding standard PVC cables (max 105°C). 2. **EMI/RFI Shielding**: Metal braiding or foil reduces signal noise by 90% or more, crucial for sensitive instrumentation. 3. **Durability**: Resists oils, acids, and mechanical wear, with flame-retardant options (UL VW-1 certified). 4. **Flexibility**: Despite robust materials, designs like spiral-wrapped shields allow bending without performance loss.
Application Areas
**Aerospace**: Engine sensors and avionics where weight savings and reliability are paramount. **Industrial**: Steel mills, glass factories, and power plants for motor leads and thermocouples. **Automotive**: Electric vehicle battery systems and exhaust gas sensors. **Military**: Harsh-environment communications equipment meeting MIL-DTL-16878 standards.
Maintenance and Precautions
Regularly inspect shielding integrity using continuity testers; damaged braids compromise EMI protection. Avoid sharp bends below the cable’s minimum bend radius (typically 5x diameter). Store coils away from UV exposure and moisture. For installations near moving parts, use abrasion-resistant jackets or conduits. Always verify that operating temperatures align with the cable’s rating—sustained overheating degrades insulation over time.
B2B Procurement Guide
1. **Specifications**: Define temperature range, voltage rating (e.g., 600V), and shielding effectiveness (dB attenuation). 2. **Certifications**: Look for UL 1423, MIL-SPEC, or RoHS compliance for quality assurance. 3. **Customization**: Suppliers often offer tailored lengths, connectors, or shielding types (spiral vs. braided). 4. **MOQs**: Industrial-grade cables may require bulk orders (100+ meters); sample testing is recommended. 5. **Suppliers**: Prefer manufacturers with ISO 9001 certification and aerospace/defense sector experience.
Related Manufacturers
- 主营：绝缘线、双绞线、软电线、耐火电缆、家装电线、平行电线、塑铝电线、铜芯电缆、电线电缆、双绞电线、一缆电缆、花线电线、低压电缆、电力电缆、防腐蚀线、光伏线缆、光伏电线、绝缘阻燃线、纯铜芯硬线、单芯塑铝线、家装布电线、耐腐蚀布电线、国标低压铝线、多股铝线电缆、家用铜芯
- 主营：绝缘电线、特种电缆、低压电缆、高压电缆、绝缘电缆、低压阻燃电缆、聚烯烃耐火
- 主营：特种电缆、屏蔽控制电缆、矿用橡套电缆、矿用通信电缆、矿用控制电缆、计算机屏蔽电缆、计算机电缆ZR-DJ、阻燃计算机电缆、KVVP屏蔽控制电缆、多芯计算机线缆、MY矿用橡套软电缆、矿用阻燃控制电缆、铠装控制电缆、矿用阻燃橡套电缆、矿用通讯拉力电缆、绝缘计算机电缆、煤矿井下矿用电缆、矿用屏蔽控制电缆、计算机信号电缆、DJYPV计算机电缆、矿用金属屏蔽橡套电缆、阻燃计算机屏蔽电缆、矿用铠装控制电缆、光缆、通信光缆
- 主营：电源电缆、航空导线、水密电缆、电子装备、编织防波套
- 主营：UL3767、UL10064、UL3302、射频同轴电缆、UL10368、UL3266、UL4413
- 主营：机器人、传感器、tpe外皮、电缆线、裸铜线、电源线、屏蔽线、信号线、tpe屏蔽、信号电缆、电源电缆、火牛电缆、pu护套1、聚氨酯、铁氟龙、tpe热塑、国标2芯、yspt水工、4芯双绞、耐磨2芯、profibus-pa、芯美规ul、20芯双绞、防油耐磨、水工检测
- 主营：玻璃纤、镀银耐、除霜加、高温线、电缆线、硅胶线、编织线、发热线、屏蔽线、加热线、飞扬线缆、补偿导线、温线电线、导线电线、镀锡铜线、高温电线、纯铜芯、加热带、化霜加、排水管、铁氟龙、冷库管道、排水化霜、云母绕包、镀锡铜丝
- 主营：电线电缆、补偿导线、耐高温补偿、高温线、硅橡胶电缆、铁氟龙高温线、高温高压线
- 主营：rs485电缆、计算机电缆、铠装电缆、控制电缆、矿用电力电缆、矿用通信电缆、矿用控制电缆、矿用铠装电缆、矿用电缆、矿用光缆等、欢迎致电咨询、矿用阻燃光缆
- 主营：铠装光缆、监控光缆、多股铜丝、电话线、视频线、监控线、双绞线、通讯线、数据线、信号电缆、监控电缆、总线电缆、防爆电缆、音频电缆、屏蔽电缆、控制电缆、射频电缆、漏泄电缆、电源电缆、同轴电缆、电话电缆、算机电缆、防爆光缆、阻燃光缆、铜芯铜网
- 主营：天津市电缆总厂橡塑电缆厂、廊坊生产各种特种电缆、通信电缆等、包括矿用、船用
- 主营：新能源汽车电缆、耐油电缆、防水电缆、卷筒电缆、行吊电缆、起重机电缆、弹簧电缆、扁电缆、机器人电缆、ROV零浮力电缆、PUR聚氨酯电缆、柔性拖链电缆、耐高/低温网线
- 主营：通讯电缆、矿用阻燃电缆、矿用网线、矿用橡套电缆、计算机电缆、控制电缆、矿用通讯电缆、防水电缆、RS485电缆、HSGWP22电缆、超五类网线、超六类网线、屏蔽电缆、铠装电缆、铠装屏蔽网线、矿用光缆、铠装光缆
- 主营：补偿导线、高温线、热电偶、贵金属
- 主营：卷筒电缆、扁电缆、水下零浮力电缆、拖链电缆、捕鱼灯电缆、防爆扁电缆、防冻电缆
- 主营：津达线缆、津达电缆、津达电线、阻燃电线电缆、耐火电线电缆、低烟无卤阻燃耐火电线电缆、矿物质绝缘防火电缆、光伏电缆、高压电缆、充电桩专用电缆、弹性体软电缆、家庭装修用阻燃电线、计算机电缆、消防电线电缆、控制屏蔽电线电缆、电力电缆、屏蔽通信电缆、屏蔽电缆、控制电缆、屏蔽信号电缆、RVVP通信屏蔽电缆、RVVP屏蔽电缆、屏蔽电线电缆、特种电线电缆、矿物质绝缘电缆
- 主营：通信电缆、屏蔽双绞线、计算机电缆、铁路信号电缆、矿用同轴电缆