Polyester (Amide)(Imide) Overcoated with Polyamideimide Film-Insulated Round Copper Magnet Wire Thermal Class 220. The wire consists of a copper conductor coated with polyester insulation and a top layer of polyamideimide (PAI) film for enhanced performance, especially at elevated temperatures.
Double Insulation Layer
Polyester: Provides base-level insulation with good electrical and mechanical properties.
Polyamideimide (PAI) Overcoat: Enhances resistance to heat, chemicals, and abrasion. It also improves the wire’s performance in high-friction or tough environments.
Table 1 Specifications
| Insulation materials | Film – lnsulation Types Polyester Overcoated with Polyamideimide; Polyester (lmide) Overcoated with Polyamideimide; Polyester (Amide) Overcoated with Polyamideimide |
| Thermal Class | 220 |
| Dimensions | Single 14-44 AWG, Heavy 4-44 AWG, Triple 14-44 AWG |
| Insulation thickness | Single, Heavy, Triple |
| Certificate | MW 37-C |
Table 2 Periodic conformance tests
| Thermoplastic flow | Median not less than 325ºC |
| Solubility | Specimens immersed in xylene and 50/50 xylene/butyl Cellosolve shall not soften sufficiently to expose the bare conductor |
| Dielectric breakdown rated temperature | Average not less than 75% of the value required at room temperature |
| 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 Wire Size Range AWG 14-41 |
Table 3 Properties
| Adherence and flexibility | No cracks visible in the film coating |
| Elongation | Not less than the value 5-38 |
| Heat shock | No cracks visible in the film coating after conditioning at 240ºC |
| Springback | 14-30 AWG: not greater than the value in Maximum Degrees per Turn 42-66 4-13 AWG: not greater than 5º |
| Dielectric breakdown | 4-9.5 AWG: Single Build: 1870V Heavy Build ≥ 3400V-3700V 10-23.5 AWG: Single Build or Type 1 ≥ 2740V-3740V Heavy Build or Type 2 ≥ 4930V-6800V Triple Build or Type 3 ≥ 6590V-8450V 24-37 AWG: Single Build or Type 1 ≥ 1360V-2710V Heavy Build or Type 2 ≥ 2270V-4870V Triple Build or Type 3 ≥ 3100V-6500V 38-44 AWG: Single Build or Type 1 ≥ 300V-500V Heavy Build or Type 2 ≥ 600V-950V Triple Build or Type 3 ≥ 845V-1400V |
| Continuity | 14-44 AWG: max number of discontinuities Single Type 1: 350±5% – 1000±5% Heavy Type 2: 500±5% – 1500±5% Triple Type 3: 750±5% – 2000±5% Quad: 1000±5% – 2500±5% |