Advanced Silk Coated Enameled Wire for Aviation Needs

• Customization: Available
• Insulation Level: C, H, F, B
• Certification: ISO9001, CE, CCC, RoHS, VDE, UL(Cert. No. E326617)IATF16949
• Model NO.: USTC
• Brand: Hongtong
• Application: Transformer, Instrument, Electrical Equipment, Motor
• Shape: Round Wire
• Conductor Material: Copper Wire
• Customizable: Yes
• Product Model: QA, Uew
• Thermal Class: B (130°c), F (155°c), H (180°c)
• Enamel Thickness Grade: Grade 1, Grade 2, Grade 3
• Delivery Time: 7-10 Days
• Enamel Type: Polyurethane
• Transport Package: Standard Export Package with Pallets
• Specification: Φ 0.035mm-Φ 6.00mm
• Trademark: Hongtong
• Origin: China
• HS Code: 8544110000
• Production Capacity: 20000 Tons/Year

Product Description

 

Product Description

 

Silk-covered wire refers to an electromagnetic wire formed by wrapping one or two layers of natural or synthetic fibers over an enameled stranded wire. Common types include polyester fiber-covered wire, nylon fiber-covered wire, and self-bonding fiber-covered wire (acetone-bonded or hot-air bonded).

Type	Silk Layer Material	Processing Method	Key Properties
USTC	Polyester, Polyamide	Single-layer silk wrapping	Heat resistance class 130
UDTC	Polyester, Polyamide	Double-layer silk wrapping (tight, nocopper exposure)	Heat resistance class 130
UDATC	Polyester + AcetateFiber	Double-layer silk wrapping (tight, nocopper exposure)	Heat resistance class 130, acetone solvent bonding, strong adhesion, rapid coil fomming
UDHTC	Polyester + PolyamideFiber	Double-layer silk wrapping (tight, nocopper exposure)	Heat resistance class 110, hot-air bonding (110-140C), strong adhesion, rapid coil forming.environmentally friendly

Features & Advantages:
1:Excellent high-frequency resistance.
2:Neat coil winding arrangement with high Q-factor.
3:Superior to enameled stranded wires: Silk protection minimizes wire damage during winding, ensuring enhanced electrical performance.
4:Self-bonding silk-covered wires offer high adhesion, rapid forming, and eco-friendliness (hot-air bonded type).
5:Excellent direct solderability with minimal residue.
6:Customizable production based on client requirements (wire diameter, structure, etc.).

Applications of Silk-Covered Wires:

• High-Frequency Electronics: RF inductors, high-frequency transformers, 5G communication modules.

• New Energy Systems: Solar inverters, EV charging coils, wind turbine generators.

• Consumer Electronics: Wireless chargers, drone motors, smart device coils.

• Industrial Equipment: Welding machine coils, motor windings, solenoid valves.

• Medical Devices: MRI system coils, electrosurgical tools, diagnostic equipment.

• Aerospace & Defense: Avionics wiring, satellite communication components, radar systems.

 

Key Advantages Highlighted:

• Optimized for high-frequency resistance and minimal skin effect loss.

• Widely adopted in extreme environments (high temperature/vibration).

• Compliant with automotive (AEC-Q200) and medical (ISO 10993) standards.

 
Representative specifications and parameters:  

Specification	AWG Gauge	Conductor Diameter (mm)	Conductor Diameter (inches)	Number of Strands	Stranding Type	Max. Overall Diameter (mm)	Max. Overall Diameter (inches)	Rated Voltage (V)	Max. DC Resistance (Ω/km) @20ºC
UDATC 2UEW 155 0.032*15	44	0.032	0.00126	15	15	0.24	0.00945	380	1605
UDATC 2UEW 155 0.400*60	26	0.400	0.0157	60	60	4.33	0.1705	2300	2.40
UDATC 2UEW 155 0.071*1700	41	0.071	0.0028	1700	68*5*5	4.31	0.1694	850	3.12
UDATC 2UEW 155 0.08*105	40	0.080	0.00315	105	21*5	1.19	0.0469	850	36.32
UDATC 2UEW 155 0.08*180	40	0.080	0.00315	180	36*5	1.65	0.0649	850	21.19
UDHTC 2UEW 155 0.060*200		0.060	0.00236	200	40*5	1.35	0.0531	750	33.61

 

 

Company Profile

Established in 2004, HANGZHOU HONGTONG WIRES CO.,LTD specializes in the R&D and manufacturing of high-performance enameled wires. With 20+ years of technical expertise, we deliver IEC-compliant solutions for global clients through our IATF 16949 certified production systems and UL-recognized (E326617) quality control.  

Our IATF 16949 certified manufacturing system ensures rigorous quality control throughout the production lifecycle:
 
1. Multi-Tiered Inspection 
 → Incoming copper rod: IEC 60468 conductivity testing  
 → In-process: 20+ parameter checks (film thickness, dielectric strength, flexibility)  
 →  Final QA: 100% batch traceability via barcode system  

2. Advanced Capabilities
   → Test equipment: Digital meggers, laser micrometers, torsion testers  
   → Compliance: Full adherence to IEC 60317 & UL 1441 standards  

 

 

Workshop&Equipment

With dual manufacturing hubs spanning 53,000m², our facilities deliver 20,000+ tonnes annual capacity of precision enameled wires:  

*Hangzhou Base (Est. 2004)  
 → 23,000m² in Western Hangzhou  
 → Core focus: R&D & multi-process production  
 →260+ machines including:  
   - High-speed wire drawing machines  
   - Litz wire assembly systems (bunching/taping)  
   - Flat wire production lines  

*Xuancheng Base (Anhui Economic Zone)  
 → 30,000m² automated facility  
 → 19 continuous enameling lines  
 → 118 heavy-capacity drawing machines  
 → Primary output center for bulk orders  

→ Integrated IoT monitoring across both sites  

Certifications

Our manufacturing process strictly complies with IEC standards while integrating custom quality requirements. All production is controlled under IATF 16949 and ISO 9001 certified systems, with end-product quality validated by UL (E326617), RoHS, and REACH certifications.  

FAQ

Q1: What temperature classes do your enameled wires support?

A: Our wires cover 130°C (Class B) to 240°C (Class C) thermal grades:  
| Class | Max Temp |            Typical Applications        |  
|    B    |     130°C    | Household appliances, small motors |  
|    F    |      155°C    | Industrial pumps, dry-type transformers |  
|    H   |      180°C    | EV traction motors, HVAC systems |  
|    C   |      240°C    | Aerospace controls, oil-filled transformers |  
*Custom formulations available for extreme environments.*  

Q2: What wire diameters can you provide?

A: Standard range: Φ0.035mm-1.000mm (AWG47-23).  
→ Non-standard sizes: Custom orders from 5kg batch.  
→ Precision tolerance: ±0.002mm (per IEC 60317).  

Q3: Are your products RoHS compliant?
A: Yes, all wires comply with:  
✓ RoHS Directive 2015/863 (Certificate E326617)  
✓ REACH SVHC <0.1%  
✓ UL ECOLOGO® standards  

Q4: How to optimize wire selection for high-frequency transformers?
|     Factor     |     Recommendation    |   Technical Benefit   |  
|   Skin Effect  | Litz wire constructions |   Reduces AC losses >85% @100kHz   |  
|  Dielectric Loss |   Polyesterimide coating   |   Minimizes capacitance drift   |  
| Process Efficiency|   Self-bonding wires    |   Eliminates varnish process   |  

*Contact us for application-specific simulation reports.*