SUNKEAN Silicone Cables: The Reliable Choice for High-Temperature Applications

HIGH-TEMPERATURE CABLE · SILICONE INSULATION · AI / EV / INDUSTRIAL

When people mention "high-temperature-resistant cables," most think first of thick insulation layers and a relatively stiff feel. In reality, however, in high-temperature scenarios such as AI servers, new energy vehicles, and industrial equipment, there is a type of cable known for its flexibility that has long served a critical insulation role — this is silicone (silicone rubber) cable.

Especially as AI continues to advance, power density in data center servers keeps climbing, and server cabinets operate under sustained high temperatures over the long term. With their high temperature-resistance rating and soft, conformable performance, silicone cables provide data centers with reliable 24/7 uninterrupted operation assurance.

01 Why High-Temperature Scenarios Choose Silicone

To answer this question, we first need to understand silicone's "origin" — it follows a completely different technical path from thermoplastic materials such as PVC and PE.

Thermoset Material: Vulcanization Means "Form Is Set"

Silicone is a thermoset material. Once vulcanization and cross-linking are complete, its molecular structure is permanently set. Even with sustained temperature increases, it will not soften or deform the way thermoplastic materials do.

This inherent characteristic directly determines silicone cable's stable performance in high-temperature environments: standard temperature ratings start at 125°C, and with higher-performance formulations, can reach 200°C. Even under prolonged high-temperature operating conditions, it still maintains stable physical form and electrical performance.

It is precisely because of this heat-resistant performance that silicone cables handle current load more easily. They are less prone to insulation degradation caused by excessive temperature rise, and they can maintain stable current-carrying capacity under sustained high-temperature loads — thereby providing reliable assurance for the overall project's safe operation and long service life.

Light, Soft, Cost-Effective: Visible Value for Money

Under comparable flame-retardant performance, the differences between silicone and XLPE in cost control and feel are clearly visible. From an economic standpoint, silicone has a significantly lower specific gravity than XLPE, allowing more length to be extruded for the same weight. Combined with its inherent raw-material price advantage, silicone cable demonstrates more outstanding competitiveness in unit cost compared with similar high-temperature materials — making it particularly friendly to projects that must balance high-temperature performance with budget control.

As for user experience, XLPE insulation materials commonly have a hardness between 89–95A, while standard silicone can be controlled at 70A or below, making it more flexible overall. Compared at the same cross-section, silicone cable offers a smaller bending radius and smoother routing — whether pulled through conduit or wired inside equipment, it delivers a lighter, more labor-saving installation experience.

Heat-Resistant + Flexible: A Versatile Choice Across Scenarios

The reason high-temperature silicone cables are widely used in real-world scenarios is that they offer two key characteristics at once: one is the ability to withstand high temperatures, and the other is being sufficiently flexible.

Take AI servers as an example. The continuous operating temperature inside server cabinets often exceeds 80°C or even higher. Cables must be laid out for extended periods in close proximity to motherboards, power modules, and high-frequency backplanes, without occupying too much space.

In new energy vehicles, the entire system — from the high-voltage connections inside the power battery pack, to the motor windings in the e-drive system, to the vehicle's high-voltage harness and fast-charging interface — must cope with the high-temperature environment near the motor and electronic control units, while also routing through the narrow body structure. Both flexibility and heat resistance are indispensable.

In the industrial sector, equipment such as metallurgical electric furnaces, glass kilns, welding robots, and plastic extrusion lines operates year-round under heavy 200°C loads, where silicone cable continues to perform stably. It is safe to say that wherever the temperature runs high and flexible routing is required, high-temperature silicone cable finds its place.

02 SUNKEAN Authoritative Certifications

SUNKEAN silicone cable products have obtained UL certification, meeting North American market access requirements, and also comply with RoHS environmental standards, in line with the global trend toward green sourcing.

Bound by multiple international standards, the cable's core specifications — including bending radius, rated temperature, and flame-retardant performance — are clearly defined. Among these, the flame-retardant rating has passed the authoritative VW-1 / FT1 / FT2 tests, simulating real-world cable performance when exposed to open flame during vertical or horizontal installation, reducing project fire risk at the source.