API Delevan PT75R-900HM

Inductance tested at 1 kHz, less than 10 gauss, and 0 ADC. DC resistance at 25°C. Rated DC current based on ambient temperature 25°C, maximum temperature rise 40°C, and AC current of 0 Arms. Windings use single-layer construction to maximize operating frequency and minimize board space. Self-leads tinned to within 0.050 inches of mounting plane. Other values available upon request. Packaging is bulk only. Standard mounting is self-lead radial mounting as shown in Figure 1. Optional mounting configurations include self-lead horizontal mounting as shown in Figure 2, or vertical base mounting as shown in Figures 3 and 4. The PT toroidal inductor series specifies inductance values at AC and DC signal levels that have no significant effect on the permeability of the powdered iron toroidal core. Under operating conditions, superimposed AC and DC voltages alter permeability, thereby changing inductance values. In general, DC current decreases inductance, while AC signals increase inductance up to a certain level before it begins to decrease. Supporting information detailing the AC or DC effects on each component is provided. Saturation due to DC current is specified under waveforms with less than 1% ripple content. When considering AC waveforms, both frequency and voltage level must be taken into account. To determine the effect of an alternating sinusoidal signal, the voltage/frequency factor curve can be used. To determine the expected change in inductance at a given voltage level and frequency, simply divide the RMS voltage of the sine wave by the frequency. Voltage is in volts and frequency is in hertz. For example, if a PT25-680 component is used with a signal RMS voltage of 1 V at a frequency of 25 kHz, the voltage/frequency factor is calculated as: 1 VRMS / 25,000 Hz = 40×10⁻⁶. Referring to the chart, inductance is expected to increase by 39%. Figure 6 (page 100) shows typical saturation effects as a function of DC current through the component. Data represents DC waveforms with less than 1% ripple and AC waveforms of less than 10 gauss. This information is intended to assist designers in component selection. Each application may contain additional variables that must be considered when selecting components, such as temperature effects, waveform distortion, etc. Delevan sales/engineering personnel can provide information for each application as needed. Note: Vertical configuration is the standard configuration; horizontal mounting requires the suffix "HM".