Industrial-grade high-voltage winding wire products with exceptional thermal limits and dielectric properties.
In high-power industrial electrical engineering, selecting winding material with a 4.00 mm diameter represents a balance of structural rigidity, low resistance, and mechanical winding flexibility. As a premier enameled coated wire cable 4mm factory and exporter, Suzhou Daiming Electrical Materials Co., Ltd. addresses the evolving demands of motor manufacturers, transformer engineering operations, and heavy machinery markets. Enameled wire of this caliber utilizes an optimized core with advanced polymeric coatings designed to resist dielectric breakdowns, severe physical stresses, and extreme temperatures.
The 4mm wire thickness requires careful insulation formulation to avoid cracking during high-speed tensioned winding. Standard applications utilize single, heavy, or triple-layer varnish formulations, primarily composed of Polyesterimide (EIW), Polyurethane (UEW), or Polyamide-imide (AIW). These chemical films are cured in multi-zone vertical ovens to guarantee uniform thickness and concentricity, preventing partial discharges in high-frequency applications.
Unlike thinner magnet wires, 4mm enameled wires are structural conductors designed to handle higher current loads. They feature high mechanical strength and reliable springback resistance. The precision-engineered coat insulation ensures that even under tight bending radii, the coating does not rupture.
| Insulation Class Code | Polymer Composition Type | Thermal Class Rating (°C) | Target Applications & Environmental Strengths |
|---|---|---|---|
| Class 130 (B) | Polyurethane / Polyester base | 130°C | Standard domestic appliances, relays, small transformers with high solderability. |
| Class 155 (F) | Modified Polyurethane (UEW) | 155°C | High-efficiency industrial motors, switch-mode power supplies, solenoids. |
| Class 180 (H) | Polyesterimide (EIW) | 180°C | Power transformers, industrial automation sensors, and wind turbine generators. |
| Class 200 / 220 (K/R) | Polyesterimide + Polyamide-imide (AIW) | 200°C - 220°C | 800V EV traction motors, deep-well pump components, sub-sea oil/gas electronics. |
Suzhou Daiming Electrical Materials Co., Ltd. is located in Suzhou, China, a global hub for precision manufacturing. Spanning a 258,333.33 ft² advanced facility, our plant integrates all stages of production—from continuous copper rod casting and precision wire drawing to chemical coating formulation and packaging.
By running 30+ state-of-the-art production lines, we ensure high capacity and quick turnaround times. Vertical manufacturing allows us to secure raw materials at stable costs, insulating our global clients from supply shocks.
Consistently scaling up capacity to meet global energy, automotive, and grid infrastructure needs.
Our materials undergo strict testing to ensure they handle mechanical stress, high temperatures, and chemical exposure.
Each batch goes through continuous laser-micrometer testing, ensuring outer diameter consistency and high dielectric performance.
A dual-coat structure of polyesterimide and polyamide-imide handles mechanical friction during high-speed winding and dynamic operations.
We supply precise wire configurations from 0.08mm to 6.00mm, with options for customized base shapes (flat/round) and insulation layers.
Operating as an exporter requires adhering to international standards. At Suzhou Daiming, our products conform to IEC 60317, NEMA MW 1000, and JIS C 3203. This keeps our enameled aluminum wire, enameled copper wire, and copper-clad aluminum (CCA) options compatible with global manufacturing systems.
Our 4mm enameled wires provide electrical isolation and energy transfer across multiple industrial applications.
Provides robust winding solutions for power distribution units, dry-type transformers, and industrial generators.
Ideal for heavy-duty household air conditioning compressors, washing machine motors, and power supplies.
Supports robust magnetic fields in magnetic coils, lifting magnets, and automation sensor arrays.
Optimized for wind turbine generators, solar power inverters, and heavy-duty grid equipment.
Exploring advancements in high-voltage powertrains, material cost-efficiency, and global power grid upgrades.
Our custom Continuously Transposed Conductor (CTC) reels were exported to Turkey to support high-capacity transformer upgrades for the regional power grid.
As electric vehicle architectures transition to 800V systems, winding wires require higher partial discharge resistance and improved thermal dissipation.
Amid copper price volatility, our enameled copper-clad aluminum wire options provide a lightweight, cost-effective choice for various electrical applications.
Answers to common engineering questions regarding enameled coated wire specifications and design options.
Explore our full range of winding wires, from enameled copper-clad aluminum to self-adhesive transposed conductors.
