API Delevan introduced it new Series PTHF-SM and PTKM-SM power toroids in a surface mount package with inductance values ranging from 10 uH to 1000 uH. Resistance values are as low as 0.01 ohms and current ratings are up to 7.36 amps. The toroid core provides good shielding properties. The series offers four package sizes. 0.70 × 0.67 × 0.40, 0.57 × 0.56 × 0.40, 0.44 × 0.44 × 0.40, and 0.34 × 0.34 × 0.30.
The PTHF-SM series utilizes a nickel-iron composition toroid core which allows high levels of direct current to be passed through the inductor without saturation effects. Series PTKM-SM is constructed on a Kool-Mu toroidal core that has low AC core loss characteristics for switch mode applications.