Class 155 Polyester Film-Insulated Round Copper Magnet Wire is a kind of magnet wire with good insulation performance and heat resistance. It is coated with a layer of insulating varnish composed of modified polyester resin on the surface of the copper conductor.
Table 1 – Dimensions
| Insulation materials | Polyester Film |
| Thermal Class | 155 |
| Dimensions | 25-50 AWG |
| Insulation thickness | Single and Heavy |
Table 2 – Properties
| Adherence and flexibility | No cracks visible in the film coating |
| Minimum Percent Elongation | Not less than the value 7% -28% |
| Heat shock | No cracks visible in the film coating after conditioning at 175°C |
| Springback | 25-30 AWG: not greater than 64-80 according to size, Mandrel Diameter and Tension |
| Dielectric breakdown | 25-37 AWG: Single Build or Type 1：≥ 2040V-2640V Heavy Build or Type 2: ：≥ 2270V-4740V 38-50 AWG: Single Build or Type 1：≥150V-500V Heavy Build or Type 2：≥300V-950V |
| Continuity | 25-44 AWG: max number of discontinuities Single Type 1: 350±5% – 750±5% Heavy Type 2: 500±5% – 1000±5% Quad: 1000±5% – 2000±5% 45-50 AWG: max number of discontinuities Single Type 1: 25±5% Heavy Type 2: 10±5% |
Table 3 – Periodic conformance tests
| Thermoplastic flow | Median not less than 250°C |
| Solubility | Specimens immersed in xylene shall not soften sufficiently to expose the bare conductor |
| Dielectric breakdown rated temperature | Average not less than 75% of the value in table 2 |
| Scrape resistance | Lowest grams-to-fail load for any one of three tests, and the average of the three tests shall not be less than the values in Helical Coil Preparation and Bond Retention table |
Characteristics
Excellent solvent resistance
Scratch resistance
Better heat resistance than ordinary polyester enameled wire
Its hydrolysis resistance is relatively poor
Suitable for a variety of high-temperature working environments.
Application
Coils for electronic communication lighting, sealed submersible motors, micro generators, heat-resistant transformers, contactors and solenoid valves.
It is also suitable for manufacturing soft composite materials for electrical use, solar cell backplanes and electrical pressure-sensitive adhesive tape substrates, and is widely used in various types of motors, dry-type transformers, electronic appliances, power switches, power capacitors, solar cell modules and LED light source products.