SurfIND SMD Common-Mode Chokes Handle Up to 36 A at 158°F

    May 5, 2025
    TDK Corporation’s EPCOS SurfIND chokes feature self-leaded SMD terminals for reflow soldering and high-current noise suppression.
    Related To:
    © TDK Corporation
    TDK EPCOS SurfIND series PowerLine Chokes

    SurfIND is a surface-mountable series of current-compensated ring core double chokes designed for high-current filtering in applications up to 36 A at 158°F (70°C). These components are suitable for reflow soldering and can support higher current levels with additional cooling, using the top side as a direct heat sink interface.

    Designed for 250V AC systems, SurfIND chokes are available in seven variants with nominal inductance values from 120 to 820 µH. A stray inductance of approximately 0.6 to 1% allows additional suppression of differential-mode noise. All variants comply with IEC/EN 60938-2 and share a 2 x 1.5 in (40 x 38 mm) footprint, with heights of 0.8 in (21 mm) for A types and 0.9 in (22 mm) for B types. DC resistance ranges from 0.78 mΩ to 2.21 mΩ. Rated inductance drops by less than 10% under rated current at 68°F (20°C) with DC magnetic bias.

    Each component includes a ferrite core coated in epoxy and a plastic baseplate, both UL 94V-0 certified. The connection design avoids adhesives, and self-leading terminals simplify surface mounting using reflow soldering.

    Features:

    • Rated current range of 24 to 36 A at 158°F (70°C)
    • SMD design for reflow soldering
    • Compact 2 x 1.5 in (40 x 38 mm) footprint
    • Height of 21 mm (A type) or 22 mm (B type)
    • Nominal inductance range from 120 to 820 µH
    • Typical resistance of 0.78 to 2.21 mΩ
    • Up to 1% stray inductance for differential-mode noise suppression
    • UL 94 V-0 compliant ferrite core and plastic baseplate
    • Adhesive-free mechanical connection design

    TDK Electronics, Inc. | TDK Corporation
    Woodbridge, NJ
    (732) 906-4300
    [email protected]
    tdk-electronics.tdk.com