Get to Know 2UEW Magnet Wire
The selection of magnet wire is paramount to the performance of electromagnetic devices like motors, transformers, and inductors. Globally, 2UEW (Grade 2 Polyurethane Enamel) has become a dominant and preferred specification. Its widespread adoption is directly attributable to the advantageous combination of excellent, direct solderability and optimized electrical and mechanical characteristics.
What is 2UEW Magnet Wire?
UEW (Polyurethane Enameled Wire): This indicates that the wire’s insulation is polyurethane. Polyurethane insulation is characterized by its excellent self-solderability, allowing direct soldering at specific temperatures without pre-stripping the insulation layer, which is very convenient in production.
2: Insulation film thickness is level 2 (standard/medium thickness).
U: Indicates that the insulation coating is polyurethane.
EW: Stands for Enameled Wire, i.e., enameled wire.
Core Features & Benefits
| Feature | Benefit |
| Direct Solderability | Solderable without stripping the enamel, speeding up production and reducing wire damage. |
| Class 130 Thermal Rating | Reliable performance in temperatures up to 130°C for broad applicability. |
| Good Flexibility | Easy to wind, even at high speeds, without cracking or losing insulation. |
| Chemical Resistance | Holds up against oils and solvents, ensuring longevity in tough environments. |
| Strong Insulation | Prevents short circuits between wire turns for safe and stable operation. |
2UEW vs. Other Common Enameled Wires
To better understand the positioning of 2UEW, we will briefly compare it with two other common enameled wires:
2UEW vs. UEW: They are very similar, the main difference being their heat resistance rating. UEW is typically grade 120, while 2UEW is grade 130, offering slightly higher thermal stability.
2UEW vs. EIW / PEW: EIW (polyesterimide enameled wire) has a higher heat resistance rating (grade 180 or higher), but its coating cannot be directly soldered; the enamel film must be removed first. Therefore, 2UEW has an irreplaceable efficiency advantage in applications requiring direct soldering.
Typical Applications of 2UEW Enameled Wire
| Application Area | Common Examples |
| Motors & Generators | Household appliance motors (fans, blenders), power tool motors |
| Transformers & Inductors | Switching power supplies, ballasts, various coils |
| Automotive Electronics | Window motors, cooling fans, sensors |
| Electronic Components | Relays, solenoids, high-frequency transformers |
How to Choose High-Quality 2UEW Magnet Wire?
When selecting 2UEW enameled wire, pay attention to the following:
Conductor Material: Ensure the use of high-purity oxygen-free copper to guarantee the lowest resistance and optimal conductivity.
Coating Uniformity: A uniform coating is crucial for ensuring insulation performance and solderability.
Supplier Qualification: Choose reputable manufacturers that ensure products meet international standards (such as JIS, IEC, NEMA).
Specification Matching: Select the appropriate wire gauge based on your design current, slot fill factor, and operating temperature.