Product Description

UL3640 Silicone Rubber Insulated Wire is a high-performance hook-up wire designed for internal wiring in electrical and electronic equipment operating under elevated temperature conditions. Featuring premium silicone rubber insulation and stranded tinned copper conductors, this wire ensures excellent thermal stability, flexibility, and electrical reliability.

Rated at 150°C and 1100V AC, UL3640 wire complies with UL758, UL1581, and CSA standards, making it suitable for global applications requiring strict safety and environmental compliance. It also meets RoHS and REACH requirements, ensuring eco-friendly performance.

Its superior resistance to heat, aging, and flame (VW-1 / FT1) allows it to perform reliably in demanding environments such as power systems, appliances, and industrial equipment.

   Product Construction

• Conductor: Stranded tinned copper (optional bare copper)

• Insulation: Silicone rubber (SR insulation)

• Available Sizes: Typically from 2/0 AWG to 16 AWG

• Color Options: Customizable upon request

   Technical Data

• Rated Temperature: 150°C

• Rated Voltage: 1100V AC

• Reference Standards: UL758, UL1581, CSA C22.2 No.210.2

• Flame Test: UL VW-1 & CSA FT1 vertical flame test compliant

• Environmental Compliance: RoHS & REACH

• Conductor Resistance: Based on AWG size (see datasheet)

   Key Features (5–8 Selling Points)

1. Excellent heat resistance up to 150°C

2. High voltage rating (1100V) for demanding applications

3. Superior flexibility for tight installation spaces

4. Flame-retardant (VW-1 / FT1 certified)

5. Excellent aging and weather resistance

6. Easy stripping and processing

7. Eco-friendly (RoHS & REACH compliant)

8. Stable electrical performance under thermal stress

   Applications

UL3640 silicone wire is widely used in industries requiring high-temperature and flexible wiring solutions:

• Internal wiring of household appliances (ovens, heaters, air conditioners)

• Power supply systems and control cabinets

• Energy storage systems (BESS)

• Industrial automation equipment

• Electric heating devices

• Lighting systems and LED drivers

• Automotive and EV internal wiring (non-exposed areas)

• Electronic equipment and control modul