High-Current Air Core Inductors – Coilcraft Datasheet

Category: Coilcraft Inc, Electronics, Inductors

Overview of High-Current Air Core Inductors

Coilcraft’s High-Current Air Core Inductors – specifically the GA3092-AL to WA3097-AL models – are designed with heavy gauge wire to achieve low DCR (Direct Current Resistance) and high current ratings, which are among the most efficient in the Coilcraft air-core inductor range. These inductors are characterized by their high Q values (Quality Factor), indicating lower energy loss, which is maintained at 100 or greater across a frequency range of 150 MHz to GHz. The selection offers a variety of inductance values from 3.7 nH to 30.0 nH, suitable for a range of high-frequency applications.

Key Specifications

Each inductor model boasts an impressive set of specifications including Self-Resonant Frequency (SRF), DCR, current ratings (Irms), and part weight, tailored for optimal performance in demanding environments. For instance, the GA3092-AL model has an inductance of 3.7 nH, a Q factor typically 100 at 150 MHz, and a maximum DCR of 17.5 mOhm, catering to a current of 7.0 A with a weight of 150 mg.

Operating Conditions and Materials

The inductors come with RoHS-compliant tin-silver over copper terminations, and are built to operate in ambient temperatures ranging from -40°C to +125°C. They can withstand a maximum part temperature of +140°C, while storage temperatures are specified for both the component and tape and reel packaging, ensuring the inductors’ reliability and longevity. Additionally, they exhibit resistance to repeated soldering heat conditions, a Temperature Coefficient of Inductance (TCL) between +5 to +70 ppm/°C, and a Moisture Sensitivity Level (MSL) 1.

Packaging Options

Coilcraft offers convenient packaging options compliant with EIA-481 standards for the inductors. Available packaging codes include a 7″ machine-ready reel for GA3092 to GA3095 models and a 13″ machine-ready reel for WA3096 and WA3097 models. Customers can order quantities less than a full reel, with options for tape or with a leader and trailer for handling ease.

Additional Information and Quality Assurance

The inductors are tested to MIL-STD-202 Method 215 and include an aqueous wash, verifying their robustness for PCB (Printed Circuit Board) use. While the datasheet provides detailed reference information for proper soldering and handling, Coilcraft emphasizes that specifications are subject to change and recommends checking their website for the most current data. Furthermore, these products may require Coilcraft’s approval before being deployed in medical or high-risk applications, emphasizing the company’s commitment to safety and quality control.