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TDK Extends Automotive SMD Alloy Powder High Current Power Choke

23.8.2024
Reading Time: 3 mins read
A A

TDK Corporation has extended its ERU27M series of SMD high current flat wire inductors consisting of an isolated alloy powder core and flat wire helical winding.

As power densities and currents in automotive and industrial applications continue to increase, this new series meets these requirements by using an alloy powder core material that exhibits a softer saturation characteristic than the core material used previously.

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Designed for rated currents from 36 A to 48 A, these surface-mountable components cover a range of inductance values from 2.3 µH to 8.5 µH. DC resistances are as low as 0.68 mΩ to 1.66 mΩ. Thanks to the flat wire winding, the components have very compact dimensions of only 27.1 x 25.55 mm, and the height ranges from 14.1 mm to 16.4 mm. The inductors are designed for operating temperatures from -40 °C to +150 °C.

With this magnetically shielded and robust construction with a third pin that is not electrically connected, these 4 new AEC-Q200-qualified energy storage chokes can be used in DC-DC converters, VRM modules, and POL converters especially in the automotive sector, but also in solar converters.

Besides the established and now enhanced standard portfolio, TDK Electronics can support customers in realizing space and cost-optimized solutions by changing certain production parameters. Additionally, fully customized designs are also possible.

To become familiar with the different models of this series, TDK provides a sample kit for the ERU27M chokes (B82579X0027). It contains four of each of the four variants.

Features

  • High rated current up to 48 A
  • Extremely low DC resistance down to 0.68 mΩ
  • Very low profile and small footprint
  • Insulating alloy powder core
  • Magnetically shielded
  • Third pin that is not electrically connected for improved mechanical reliability
  • Surface-mountable
  • Qualified to AEC-Q200

Applications

Energy storage chokes for

  • DC-DC converters
  • VRM modules
  • POL converters
  • Solar converters
Ordering CodeInternal codeRated inductance
LR [µH]
Rated current
Itemp [A]
DC Resistance
RDC [mΩ]
Height
[mm]
ERU27M-2R3LB82579A1232A0272.3480.6814.1
ERU27M-3R9LB82579A1392A0273.9460.8815.5
ERU27M-6R2LB82579A1622A0276.2371.3915.2
ERU27M-8R5LB82579A1852A0278.5361.6616.4
Source: TDK

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