CHINGCUNG® Special Enameled Wire Expert

Premium Grade 1 – Polyurethane Enameled Copper Wire

QA-1/155 Enameled Copper Round Wire
Polyurethane Base | Thermal Class 155 | Grade 1 Insulation Film

Ideal for high-frequency coils, transformers, motors & precision windings — optimized insulation thickness for compact designs

Why QA-1/155 Grade 1?

Grade 1 provides minimum insulation film thickness, allowing smaller outer diameters and higher winding density. Perfect for applications where space factor is critical. Combines excellent solderability (direct solder without stripping) and thermal endurance up to 155°C.

Technical Specifications (Grade 1 Focus)

Dimensional Characteristics — Grade 1 (Minimum Film Increase)

Compared to Grade 2, QA-1/155 offers thinner insulation build, maximizing copper fill factor. Below table shows typical conductor diameters with min. film thickness & max. outer diameter for Grade 1 (Grade 2 shown for reference only).

Note: Grade 1 provides approx. 20-30% thinner outer diameter vs Grade 2, enabling compact coil designs and reduced copper loss. Data based on IEC 60317-20 standard. For ultra-fine sizes (0.02-0.04mm) contact our engineers.

Product Overview & Core Features

CHINGCUNG QA-1/155 enameled copper wire is manufactured under strict process control, combining high-purity copper conductor with a uniform polyurethane insulating film. The Grade 1 build is specifically designed for engineers who prioritize compact winding windows, high slot fill factor, and efficient heat dissipation. Unlike conventional Grade 2 wires, our QA-1/155 minimizes insulation build-up while maintaining excellent dielectric strength and thermal stability.

✦ Key engineering advantages: Direct solderability eliminates pre-stripping, reducing assembly costs. The polyurethane varnish provides outstanding moisture resistance and chemical stability. QA-1/155 also exhibits superior adherence and flexibility, passing mandatory mandrel wrap tests without insulation cracking. From small solenoids to intricate automotive sensors, this wire ensures consistent performance.

✦ Quality commitment: Each production lot undergoes pin-hole testing, continuity checking, and breakdown voltage verification. Our lab is equipped with automated testers ensuring every spool matches IEC/NEMA standards. And as a specialized enameled wire supplier, we provide full traceability from raw copper rod to finished wire.

Electrical & General Information

Performance Parameters (Typical Values)

Why Choose CHINGCUNG for QA Series?

✅ With dedicated factory base in Jiangsu & Zhejiang, CHINGCUNG has been supplying reliable enameled wires to transformer manufacturers, motor rewinding workshops, and electronics OEMs globally. Our quality system ensures zero defect policy and on-time delivery. Choose QA-1/155 for projects that demand tight winding space without compromising electrical safety.

Product Resources

Frequently Asked Questions (QA-1/155)

• Q1: What is the main difference between QA-1/155 Grade 1 and Grade 2?
  A: Grade 1 features thinner insulation build (minimum film increase), resulting in smaller outer diameter. This allows more turns in the same winding area, ideal for compact motors. Grade 2 offers extra insulation thickness for higher voltage applications.
• Q2: Can QA-1/155 be soldered directly without removing the insulation?
  A: Yes, polyurethane coating is designed to be solderable at temperatures around 380-420°C, the film decomposes and leaves a clean joint.
• Q3: Is QA-1/155 suitable for high frequency transformers?
  A: Absolutely. The polyurethane base offers excellent high-frequency characteristics, low dielectric loss, widely used in switching power supplies and RF coils.
• Q4: Do you provide samples for QA-1/155 in small diameters?
  A: Yes, sample spools (1~5Kg) are available for engineering evaluation, lead time 3-5 days.
• Q5: Does the wire comply with RoHS & REACH?
  A: Yes, full environmental compliance with EU standards. Test reports can be provided.

Shanghai Husu M&E Technology Co., Ltd

CHINGCUNG Brand – Professional Enameled Wire Manufacturer

Address: Room 402, Building 13, NO. 518 Xinzhuan Road, Songjiang District, Shanghai, China (201612)

Tel/WhatsApp: +86 13621982708 ️ Email: leon.xu@chingcung.com

Web: https://chingcung.com | Inquiry for QA-1/155 Grade 1 wire now

*All data based on standard test methods, continuous improvement policy applies. Contact our engineers for custom diameters, thermal class or bonding requirements.

CHINGCUNG® QA-1/155 Polyurethane Enameled Copper Wire | Grade 1 Focused | Low space factor | Reliable for global OEMs