Explore our high-performance conductors engineered for extreme heat tolerances, low dielectric losses, and optimal mechanical integrity.
Explore our systematically categorized product ranges, manufactured using high-purity conductor cores and high-grade insulation polymers.
Cost-efficient and lightweight magnet wire solutions featuring customized insulation materials suited for standard and high-frequency environments up to 220 Class.
High-conductivity copper wire coated with advanced polymers like polyurethane, polyesterimide, and polyamide-imide, ensuring optimal space factor and mechanical resilience.
Continuously Transposed Conductors (CTC) optimized for large power transformers. Significantly reduces eddy current losses and optimizes thermal dissipation inside transformer windings.
Class H Enamelled Copper Wire represents a cornerstone technology in contemporary electrical engineering, designed to maintain operational integrity at continuous temperatures of 180°C. The formulation of its insulation layer relies on high-stability synthetic polymers. Typically, the primary coat consists of Polyesterimide (PEI) or Modified Polyester, while the overcoat is applied using Polyamide-imide (PAI) (forming the double-layer EI/AIW system).
This dual-layer structure utilizes the thermal stability of polyesterimide alongside the superior mechanical toughness, scratch resistance, and moisture barrier properties of polyamide-imide. During high-voltage spikes, this overcoat effectively mitigates partial discharge and corona erosion, protecting the copper core from dielectric breakdown.
Furthermore, Class H enameled wires demonstrate outstanding performance against chemical solvents, refrigerants, and aggressive lubricating oils, which makes them highly appropriate for hermetic compressors and heavy industrial drives.
| Property Classification | Class H Magnet Wire Standards | Class F (Comparison) |
|---|---|---|
| Thermal Rating | 180°C (356°F) | 155°C (311°F) |
| Primary Insulation Coat | Polyesterimide (PEI) | Polyester / Polyurethane |
| Overcoat Polymer | Polyamide-imide (PAI) / None | Polyamide (Nylon) / None |
| Dielectric Strength | ≥ 1500V (depending on build) | ≥ 1200V |
| Thermal Shock (at 200°C) | No cracking (20% stretch) | No cracking (15% stretch) |
| Pinhole Count (per 6m) | 0 - 1 (Standard test) | ≤ 3 |
About Suzhou Daiming Electrical Materials Co., Ltd.
Suzhou Daiming Electrical Materials Co., Ltd. is a global leader in high-performance winding wire fabrication. Our sprawling, state-of-the-art facility occupies 258,333.33 ft² of production and testing space. Equipped with 30 high-capacity, automated manufacturing lines, we sustain a steady, high-volume production output to serve complex international supply chains.
We implement strict quality assurance parameters, monitoring everything from oxygen-free copper rods to final precision spooling. This rigorous inspection process ensures that our wire diameters remain precise and insulation thickness stays uniform. By controlling these factors, we deliver high-reliability products that meet demanding electrical insulation standards.
Providing custom solutions, stable supply networks, and excellent product durability for global high-power applications.
We use high-grade enamel formulation and advanced multi-pass baking cycles to produce consistent, bubble-free insulating coats with strong adhesion and scratch resistance.
Our Class H wires resist softening at elevated temperatures, maintaining high insulation strength and physical durability under thermal overloads and mechanical stresses.
We offer customized dimensions, including round wire gauges and flat/rectangular profiles, tailored to match the packing factors required for your specific winding designs.
Supported by our 30 automated production lines, we maintain high manufacturing efficiency. This operational scale allows us to fulfill large-scale orders on time for global industrial clients.
Our enameled wires comply with international RoHS and REACH directives, supporting the development of eco-friendly, high-efficiency motors and renewable energy systems.
Our enameled wire solutions are designed to meet strict operational requirements across various high-performance industries.
Engineered for heavy-duty electric motors, traction motors, and power distribution transformers. These wires provide reliable heat dissipation and high slot fill factors under high operating loads.
Optimized for high-frequency switch-mode power supplies, domestic appliances, and micro-motors. Delivers consistent dielectric reliability inside compact enclosures.
Designed for precise servomotors, industrial solenoids, and magnetic sensors. These wires provide stable performance during rapid duty cycles and under high mechanical stresses.
Suitable for wind turbine generators, hydro-generators, and grid substation equipment. Built to withstand high voltages and severe weather conditions.
As industrial automation demands higher reliability, Suzhou Daiming incorporates Factory 4.0 principles across its manufacturing systems. Our continuous copper drawing and annealing processes are fully integrated, ensuring consistent metal grains and uniform tensile strength. The enamel baking ovens feature real-time laser monitoring systems that measure wire diameter at high speeds, detecting deviations instantly.
This automated quality management loop reduces errors and maintains tight tolerances across production runs. Furthermore, our raw materials are sourced from premium, high-purity copper cathodes (≥99.99%), which ensures low electrical resistivity and high conductivity in the finished wire.
Additionally, we utilize green manufacturing processes. By using catalytic combustion recovery units inside our drying ovens, we capture and repurpose thermal energy from solvent evaporation. This lowers our carbon footprint and improves energy efficiency without compromising the structural quality of the insulating polymer coatings.
Keep up with technical announcements, logistics updates, and emerging trends in high-performance magnet wires.
With industrial demands shifting towards lightweight materials, we analyze the performance and cost dynamics of enameled aluminum wire in modern motor topologies.
Copper prices continue to fluctuate globally. This technical review evaluates the electrical performance and economic benefits of using copper-clad aluminum wire as an alternative material.
Highlighting our international supply capabilities, we recently shipped Continuously Transposed Conductors (CTC) to Turkey to support high-voltage grid upgrades.
Get answers to common technical queries about Class H magnet wires, compliance, and custom ordering processes.
The primary difference lies in the maximum continuous operating temperature. Class H enameled copper wire is rated for continuous use at 180°C, whereas Class F is limited to 155°C. Class H wires typically feature a high-performance Polyesterimide (PEI) basecoat topped with a Polyamide-imide (PAI) overcoat, providing enhanced protection against thermal stress and mechanical abrasion.
Quality testing follows international standards including IEC 60317, NEMA MW 1000, and JIS C 3202. Key tests include high-voltage continuity (pinhole detection), thermal shock validation at 200°C, springiness assessments, peel testing for coating adhesion, and breakdown voltage verification.
Yes. We manufacture flat (rectangular) enameled copper and aluminum wires designed to improve winding space factor in high-power transformers, EV traction motors, and compact generators. We accept custom specifications for width-to-thickness ratios, corner radii, and insulation layer thickness.
Our products are manufactured in compliance with international environmental regulations. They are fully certified under RoHS 2.0 (2011/65/EU) and REACH directives, ensuring they are free from harmful heavy metals and substances of very high concern (SVHCs).
Select from our range of high-efficiency magnet wires, continuously transposed conductors (CTC), and specialized enameled insulation classes.
