Zhejiang IRONFLON Wire & Cable Co., Ltd. is one of the most professional manufacturers and suppliers of high frequency cable in China, also supports customized service. Please feel free to buy high quality high frequency cable for sale here from our factory. Also, free sample is available.
Core parameters of UL3321 high frequency cable
| parameter category | Specifications |
| Product Model | UL3321 XLPE insulated wire high temperature |
| Conductor specifications | 30 - 4/0 AWG single or stranded conductor, made of bare copper or tin plated copper, commonly available in stranded structures such as 7 strands, 19 strands, 41 strands, etc. |
| Insulation material | Radiation cross-linked polyethylene (XLPE) is treated with a special irradiation process to form a stable network structure |
| Rated temperature | Continuous working temperature of 150 ℃, able to withstand temperature fluctuations from -55 ℃ to 150 ℃ in the environment |
| Rated voltage | 600V |
| Combustion performance | Passed UL VW-1 and CSA FT1 vertical flame resistance tests, and passed the horizontal combustion test |
| Eco-Certification | Compliant with the EU RoHS environmental directive, free from harmful substances such as lead and cadmium |
| Standard packaging | 610 meters/roll, 305 meters/roll, 152 meters/roll, with waterproof and moisture-proof packaging |
The above are common specifications. Our company provides customized services and can provide comprehensive customization services according to customer needs, such as wire diameter specifications; Conductor material ; Wire color; Insulation materials ; Shielding methods, etc.If you have any questions, please feel free to contact us at any time( luna@ironflon.com )!


Performance advantages of UL3321 High Frequency Cable
1. Strong Environmental Adaptability, Stable And Reliable
The insulation layer is made of irradiated cross-linked polyethylene material, which forms a three-dimensional network molecular structure compared to ordinary PVC insulation. It can maintain stable insulation performance at a high temperature of 150 ℃ without softening deformation. At the same time, it has excellent low-temperature resistance and maintains good flexibility even in low temperature environments of -55 ℃. It can adapt to harsh working conditions with alternating high and low temperatures, such as outdoor lighting fixtures, industrial ovens, and other scenarios.
2. Excellent chemical resistance and extended service life
The product has undergone special processing and possesses characteristics such as acid and alkali resistance, oil resistance, and mold resistance. It can be used for a long time in environments containing oil and slight chemical corrosion, such as transformers, motor leads, circuit board wire, and other parts. The insulation layer has no oil leakage, so there is no need to worry about contaminating other components of the equipment, effectively extending the overall service life of the equipment.
3. Excellent electrical performance and guaranteed safety
Using high-purity bare copper or tin plated copper conductors, with excellent conductivity and low current transmission loss. The insulation layer has low dielectric loss and high insulation resistance, which can effectively prevent safety hazards such as leakage and short circuit. It has passed UL authoritative certification, making it more reassuring to use.
4. Easy To Process And Install, Improve Efficiency
The insulation layer has a uniform thickness and is easy to cut, which can greatly improve the production and assembly efficiency of customers. Suitable for wiring requirements in narrow spaces such as circuit board wires, robot cable, and internal connection wires of electronic devices. The core wire has rich and vivid colors, including more than 20 standard colors such as red, yellow, blue, and black, which are convenient for wiring and reduce installation errors.
Applicable scenarios of UL3321 High Frequency Cable

- In the field of industrial high-temperature equipment , it is suitable for internal wiring and signal transmission of industrial ovens, hot air circulation furnaces, and welding equipment, and can withstand continuous high temperatures of 150 ℃ during equipment operation; Suitable for high-temperature sensor connection wires in the metallurgical industry and heating device leads in the petrochemical industry, it can resist oil pollution and mild chemical corrosion environments.
- In the field of household appliances : used for wiring in high-temperature working areas of kitchen appliances such as microwave ovens, electric ovens, coffee machines, etc., such as heating tube leads circuit board wire, Temperature controller connection wire; Suitable for bathroom and disinfection equipment such as bathroom heaters and high-temperature disinfection cabinets, it can withstand alternating cold and hot environments, and the insulation layer does not release harmful substances.
- In the field of medical equipment , it is suitable for the internal wiring of high-temperature sterilized medical devices, such as the control circuit of high-pressure steam sterilizers and dry heat sterilization cabinets. It can maintain stable performance even in high-temperature and high humidity environments where sterilization is repeated, and meets the high safety standards of medical equipment.
Why choose our company?
1. Strong corporate strength, cornerstone of quality
Our company was founded in 2004 and has 21 years of rich experience in manufacturing high-temperature cables/wires.The company has a modern production base equipped with imported production equipment and a complete set of precision testing instruments, including wire thickness testers, insulation resistance testers, flame resistance testing devices, etc. It has established a full process quality inspection system from raw material procurement to finished product delivery.The company has accumulated 22 patented technologies, multiple qualification certifications (UL, CUL, VDE, RoHS, ISO9001 and SGS), and 3 software copyrights, with product quality reaching the international advanced level.


2. Comprehensive service advantages, worry free throughout the entire process
Our company has established a "one-on-one" exclusive customer manager system to provide customers with a full process service from product consultation, solution design to after-sales tracking. For technical issues, a professional technical support team is equipped to provide free technical consultation and optimization suggestions for wiring solutions.
3. Professional packaging and transportation to ensure delivery
The product adopts a three-layer packaging scheme of "waterproof film+hard cardboard box+pallet wrapping film", effectively preventing moisture and compression damage during transportation. Long term cooperation has been established with well-known logistics companies such as SF Express and Deppon, providing services such as regular transportation and expedited transportation according to customer needs. For large quantities of orders, we can provide full vehicle direct service and assign dedicated personnel to track the logistics status throughout the process to ensure safe and timely delivery of goods.




Obtained Certificate

We've got a lot of certificates.
Awarded " WSF World Standard Certificate ".
Awarded " Growth oriented Technology Enterprise of YueQing ".
Awarded " Science and Technology Innovation Enterprise Certificate of YueQing ".
Awarded " Certificate of sci-tech enterprises in Zhejiang Province ".
Awarded " Integrity Business Enterprise Certificate ".
Awarded " National High-tech Enterprise",
Awarded " Yueqing Patent Demonstration Enterprise"
Awarded " Yueqing Municipal Enterprise Technology Center"
Awarded " Provincial Small and Medium Technology Enterprise"
Awarded " Group Standard of Ethylene-Tetrafluoroethylene Copolymer for Wire and Cable and Optical Fiber Cable"
Awarded " Group Standard of High Voltage Battery Cable for New Energy Vehicle"
Awarded " Specialized and Specialized New Enterprise "
Awarded " Provincial New Product"
And so on.
Product packaging and transportation
Multiple protective packaging ensures quality assurance
To ensure that the product is not damaged during storage and transportation, our company adopts a packaging strategy of "layered protection+customized adaptation", optimizing packaging details based on cable specifications and transportation distance:
- Inner layer protection : The cable is first wrapped in food grade waterproof film to effectively isolate moisture and dust, and prevent the insulation layer from aging due to changes in environmental humidity; The outer layer of the film is wrapped with anti-static pearl cotton to cushion slight vibrations during transportation and protect the surface of the cable from being flat.
- Middle layer load-bearing : cardboard boxes are selected as inner boxes, which have undergone moisture-proof treatment; The box is filled with foam board to fix the cable reel, so as to prevent the cable deformation or connector looseness caused by rolling collision during transportation.
- Outer reinforcement : The outer box is wrapped with film and reinforced with wooden pallets. The bottom of the pallet is equipped with anti slip pads for easy forklift loading and unloading; The entire batch of goods is wrapped with two layers of high-strength stretch film on the outer layer, achieving triple protection of waterproof, dustproof, and anti scattering.
- Clear labeling : Each packaging unit is clearly labeled with the product model, specifications, length, production date, batch number, and warning signs such as "moisture-proof", "handle with care", and "upward" for easy customer inventory and storage management.


A three-dimensional transportation network for efficient and timely delivery
Based on years of logistics cooperation experience, our company has established a transportation system of "core logistics+emergency backup", which balances efficiency and safety:
- Logistics Cooperation Resources: Signed long-term strategic cooperation agreements with well-known logistics companies such as SF Express and Deppon to prioritize the transportation of our goods; For international orders, we cooperate with Sinotrans and Jincheng Logistics Network to provide integrated services for sea freight, air freight, and customs clearance.
- Full process visual tracking: After the goods are shipped, the dedicated customer manager will push the logistics tracking number and query link in real time, and customers can view the transportation nodes at any time through their mobile phones or computers; Large scale orders are equipped with logistics specialists to track the entire process, synchronize transportation progress daily, and coordinate and resolve any abnormal situations in a timely manner.


Exception handling mechanism, zero tolerance for risk
If there are problems such as packaging damage or shortage of goods during transportation, customers can directly contact our dedicated customer manager. We will initiate a rapid response process: verify the details of the problem within 2 hours, provide a solution within 4 hours, arrange for reshipment or on-site damage assessment and compensation within 24 hours within the province and 48 hours outside the province to ensure that it does not affect the customer's production progress.

UL3321 Wire High Temperature User Guide
Installation precautions
- Preparation in advance : Before construction, it is necessary to verify that the cable specifications (wire diameter, color) are consistent with the design drawings, check that the insulation layer is not damaged, and that the conductor is not oxidized. If packaging damage or abnormal cable appearance is found, do not use and contact the customer manager in a timely manner.
- Conductor treatment : It is recommended to use specialized wire stripping pliers when stripping, and the stripping length should be determined according to the depth of the terminal (usually 0.5mm shorter than the terminal depth) to avoid exposing and oxidizing the conductor due to excessive stripping. After stripping, the wiring should be completed quickly to prevent the conductor from getting damp.
- Wiring specifications : Keep away from sharp metal parts and high-temperature heat sources (such as adding insulation sleeves if in direct contact with heating elements), the bending radius should not be less than 4 times the outer diameter of the cable, and excessive bending or twisting is strictly prohibited; When the wiring span exceeds 1 meter, fixed clips should be installed with a spacing of no more than 30cm.
- Wiring operation : Select wiring terminals with matching wire diameters, use corresponding specification crimping pliers when crimping, and ensure that the crimping point is firm and not loose (tensile test not less than 50N); If welding is used, the welding temperature should be controlled at 350-400 ℃, and the welding time should not exceed 3 seconds to avoid high temperature damage to the insulation layer.
- Insulation protection : After wiring is completed, the insulation layer should be checked for completeness. If there are slight scratches (depth ≤ 0.1mm), insulation tape can be wrapped for repair. If the scratches are deeper, the cable should be replaced; When wiring in outdoor or humid environments, waterproof heat shrink tubing should be used to cover the wiring points and heat sealed.
- Construction environment : Avoid construction in environments with high dust concentration, flammable, explosive, or highly corrosive gases. If construction is necessary, protective measures must be taken (such as wearing dust masks and using explosion-proof tools). After construction, clean up any remaining debris on site to prevent contamination of the cable insulation layer.
Storage requirements
To ensure stable performance during product storage, the following requirements must be strictly followed:
- Storage environment : Store in a dry and ventilated enclosed warehouse, with temperature controlled between -10 ℃ and 30 ℃, relative humidity ≤ 75%, away from heat sources such as heating and steam pipes (distance ≥ 1.5 meters), and avoid direct sunlight and rainwater immersion;
- Stacking specifications : Cable reels should be placed vertically on pallets, with a maximum stacking height of 3 layers per pallet (large cables ≤ 2 layers). Different specifications of cables should be stacked separately, with a spacing of ≥ 10cm, to avoid cable deformation or insulation layer adhesion caused by compression;
- Protective measures : Unopened cables should be kept intact in their original packaging. For unused cables after opening, waterproof film should be tightly wrapped around the ports and sealed with tape to prevent moisture from entering;
Customer feedback


Customers from different industries have highly recognized product quality, customized services, and after-sales support in long-term cooperation. The following is a true feedback sharing from customers:
- We have been cooperating with IRONFLON for 3 years, and their after-sales service has given us peace of mind. Once, during the transportation of a batch of goods, there was packaging damage. After contacting the customer manager, we arranged for a replacement on the same day. Stable product quality and timely delivery make us our high-quality supplier!
- As a manufacturer of high-power LED street lights, our cables not only need to withstand outdoor high temperature exposure, but also adapt to narrow lamp body spaces. The IRONFLON cable has a small bending radius and is particularly convenient for wiring inside the lamp body, which greatly improves the assembly efficiency of workers. And the color recognition is very high. The red, yellow, and green color lines we commonly use have clear color differences, effectively reducing the rate of wiring errors.
FAQ
Q: Which Shipping Way Can You Provide ?
A: We can provide shipping by sea, by air and by express.
Q: How to handle any discrepancies in specifications or quality issues found after receiving the goods ?
A: Please contact the dedicated customer manager within 7 working days after receiving the goods, provide photos of the goods and a description of the problem, and we will verify immediately. If it is our responsibility, we will arrange for reshipment or return within 48 hours and bear the related logistics costs to ensure that it does not affect your production schedule.
Q: What is XLPE insulation made of ?
A: XLPE is an acronym for cross linked polyethylene. XLPE is a thermosetting polymer meaning that the material (polyethylene (PE)) is cured under heat and in that process forms bonds in all directions forming a three dimensional matrix.
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