PQ Cores (6678404121)
Part Number: 6678404121
78 PQ CORE SET
PQ cores were developed for use in power applications. The large surface area to volume of the core aids in heat dissipation. PQ cores are employed both in filter and transformer designs for switch mode power supplies.
PQ cores can be supplied with the centerpost gapped to a mechanical dimension or an ALvalue.
Weight indicated is per pair or set.
Weight: 97 (g)
|Dim||mm||mm tol||nominal inch||inch misc.|
AL value is measured at 1 kHz, B < 10 gauss.
A MnZn ferrite specifically designed for power applications for frequencies up to 200 kHz and low loss inductive applications to 500 kHz.
Available in 78 material:
78 Material Characteristics
|Initial Permeability @ B < 10 gauss||µi||2300|
|Flux Density @ Field Strength||Gauss
|Residual Flux Density||Gauss||Br||1500|
|Loss Factor @ Frequency||10 -6
|Tan δ/ µi||4.5
|Temperature Coefficient of Initial Permeability (20 -70°C)||%/°C||1.0|
**** Characteristic curves are measured on standard Toroids (18/10/6 mm) at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.