TDK expands compact high-current choke series ERU33 toward higher currents with new core material

These shielded components for through-hole (THT) mounting are designed for saturation currents from 55 A to 120 A at +100 °C. The three new types cover a range of inductance values from 1.4 µH to 7.2 µH and DC resistances as low as 0.46 mΩ to 1.2 mΩ. Thanks to the flat wire winding, the chokes have very compact dimensions of only 33 x 33 mm and a height of 11 mm or 15.3 mm, respectively. By thermally connecting the flat coils to the electrically insulated powder alloy core, the component can be attached to a heat sink to effectively dissipate the heat. In addition to these standard types, customized versions with other inductance values can also be realized.

The RoHS-compatible and AEC-Q200-qualified inductors are designed for operating temperatures from -40 °C to +150 °C. Typical automotive applications are buck-boost chokes for DC-DC converters (e.g., for 48 V on-board power supplies or differential mode chokes in the input filter of onboard chargers) as well as medium- and high-current battery chargers and inverters. In industrial electronics, they can be used as storage and output chokes in high-current supplies, solar inverters for PV systems, and PoL (Point of Load) converters.

To become familiar with the different models of this series, TDK provides a sample kit for the ERU33M chokes (B82579X0033); it contains four of each of the three variants.

Main applications
Energy storage chokes for DC-DC converters, VRM modules, PoL converters, and inverters in automotive and industrial applications.

Main features and benefits

www.tdk-electronics.tdk.com