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Stabilized MPP Cores

Micrometals can provide stabilized MPP (MP) cores that will have a smaller change in permeability over temperature than standard MPP cores. These stabilized cores may be required for applications requiring stable permeability over wide temperature ranges. These applications can include military, medical, aerospace or other applications that require tuned circuits.

Micrometals MPP cores are offered in three controlled stabilization classes: D, W, and M. Temperature ranges for the permeability stability are detailed in the chart below.

 

Stabilization             Maximum Change                           Temperature Range             Class                       in Permeability                               °F                   °C

   D                                 +/- 0.1%                                   30 to 130        -1 to 55

   W                                +/-0.25%                                  -67 to 185       -55 to 85

   M                                 +/-0.25%                                 -86 to 257       -65 to 125  

 

Stabilization is only effective at low drive AC flux levels of less than 100 G (10 mT). In power inductor applications, stabilized MPP cores have no advantage over standard MPP cores.

Stabilized versions of Sendust (MS), High Flux (HF), Optilloy (OP) and Fluxsan (FS) cores are not available.