The Ultimate Guide to 30 AWG Magnet Wire
30 AWG magnet wire is a finely engineered conductor widely used in electromagnetic applications where precision, space efficiency, and reliable performance are critical. With a bare copper diameter of just 0.255 mm, this wire enables compact winding designs without sacrificing electrical or thermal characteristics.
Detailed Technical Specifications
| Property | Specification / Value |
| AWG Size | 30 |
| Bare Wire Diameter | 0.255 mm (0.0100 inches) |
| Resistance (Copper, @20°C) | Approximately 0.339 Ω/m |
| Typical Current Capacity | ~0.5 to 1.2 A * |
| Standard Spool Lengths | 1 lb to 50 lb spools |
Common Insulation Builds & Finished Diameters:
Insulation thickness varies by thermal class and material. Below are typical maximum finished diameters:
| Thermal Class | Insulation Type | Typical Build | Max. Outer Diameter |
| Class 130°C (B) | Polyurethane (PU) | Single | 0.274 mm |
| Class 155°C (F) | Polyester-imide | Single | 0.279 mm |
| Class 180°C (H) | Polyamide-imide | Single | 0.285 mm |
| Class 200°C (C) | Dual Coat (AIW) | Heavy | 0.290 mm |
Available Insulation Types & Their Properties
| Insulation Type | Key Properties | Typical Uses |
| Polyurethane (PU) | • Solderability: Excellent – strips in 2-3 seconds at 370°C • Dielectric Strength: ≥ 3000 VAC • Flexibility: Excellent |
Consumer electronics, audio coils, prototyping |
| Polyester-imide (PEI) | • Thermal Endurance: High • Chemical Resistance: Good against most solvents and refrigerants • Dielectric Strength: ≥ 4500 VAC |
Transformers, industrial motors |
| Polyamide-imide (AI) | • Abrasion Resistance: Exceptional • Chemical Resistance: Excellent (resistant to oils, acids, moisture) • Dielectric Strength: ≥ 6000 VAC |
Aerospace, automotive, harsh environments |
| Bondable Variants | • Bonding Method: Heat or solvent activation • Peel Strength: ≥ 3.5 N/mm • Benefits: Eliminates need for additional coil bonding materials |
Self-supporting coils, vibration-prone applications |
Top Applications of 30 AWG Magnet Wire
The versatility of 30 AWG magnet wire makes it a go-to component across numerous industries:
Miniature Transformers: Used in power adapters, chargers, and signal transformers where space is at a premium.
Small Solenoids and Actuators: Provides the necessary windings for compact electromechanical controls.
Precision Sensors and Relays: Essential for creating the fine coils that drive accurate sensing and switching devices.
IoT and Wearable Electronics: Its small diameter and reliability are perfect for the ultra-compact circuits found in modern smart devices and wearables.
Audio Equipment: Used in the voice coils of high-fidelity microphones and headphones for precise sound reproduction.
Why Choose 30 AWG Magnet Wire?
Space Efficiency: Its fine gauge allows for a high number of turns in a minimal cross-sectional area, enabling the design of smaller and more powerful components.
Excellent Electrical Properties: Provides a reliable balance of conductivity and current capacity for its size.
Flexibility and Durability: The thin wire is highly flexible, making it easy to wind into complex shapes without breaking, while the tough insulation resists cracking.
Thermal Resilience: Available in high-temperature ratings, ensuring stable performance in demanding thermal conditions.