scope:

This International Standard provides standard AL values (inductance factors) and its tolerances of Pot, RM, ETD, EE, EP, EL and low-profile ferrite cores. The AL value and its tolerance have been specified by the users before. When manufacturers wish to have an inventory for short delivery, they have to hold the products before gapping since there is no standard for the AL value. Because of electronic commerce and the increased demand for rapid delivery of products, it will be more convenient for customers and suppliers to refer to established AL values and tolerances. This standard has been developed to meet this demand. As a result of the implementation of this standard, it will be easier for core suppliers and users to develop electronic components using gapped soft ferrite cores. Conventional businesses will benefit, as will new companies working in new fields such as e-commerce. It is recommended that users specify AL values by selecting them from this standard. Manufacturers are encouraged to use the AL values in this standard when building stocks of gapped cores for short delivery.