The DRA74-100 is a fixed inductor manufactured by Cooper Bussmann, now part of Eaton. It is designed for use in a variety of electronic circuits for filtering, energy storage, and impedance matching. The ‘DRA74’ designation specifies the physical dimensions and series, while ‘-100’ indicates the inductance value.

Applications

• DC-DC Converters: Used for energy storage and filtering in step-up, step-down, and buck-boost converters.
• EMI Filtering: Employed to suppress electromagnetic interference in power supplies and signal lines.
• RF Circuits: Used for impedance matching and tuning in radio frequency applications.
• Power Supplies: Acts as a filtering element to reduce ripple and noise.
• LED Lighting: Used in LED drivers for current regulation and filtering.

Features

• Fixed Inductance: Provides a stable and predictable inductance value.
• High Current Capability: Designed to handle significant DC current without saturation.
• Shielded Construction: Minimizes electromagnetic interference (EMI) radiation.
• Low DC Resistance (DCR): Reduces power losses and improves efficiency.
• Compact Size: Allows for use in space-constrained applications.

Benefits

• Effective EMI Suppression: Reduces unwanted noise and interference.
• High Efficiency: Low DCR minimizes power losses and heat generation.
• Stable Performance: Maintains inductance value over a wide range of operating conditions.
• Reliable Operation: Robust construction ensures long-term reliability.
• Space Saving: Compact size enables use in miniaturized electronic devices.

Additional Details

The DRA74-100 typically has an inductance value of 10µH (microhenries). The specific current rating, DC resistance, and self-resonant frequency (SRF) can be found in the manufacturer's datasheet. The inductor is often constructed with a ferrite core and wound with copper wire. Shielded inductors like the DRA74 series are particularly useful in applications where minimizing EMI is crucial. Detailed specifications, including tolerance, operating temperature range, and saturation current, should be consulted from the official Cooper Bussmann/Eaton datasheet.