IEC 60938-1:2021 pdf free download

IEC 60938-1:2021 pdf free download Fixed inductors for electromagnetic interference suppression – Part 1: Generic specification
The numerical values shall be given for the length of the body, the width and height of the body or for cylindrical types, the body diameter, and the length and diameter of the terminations. When necessary, for example when a number of items (inductance values/ voltage ranges) are covered by a detail specification, the dimensions and their associated tolerances shall be placed in a table below the drawing.
When the configuration is other than that described above, the detail specification shall state such dimensional information to describe the inductor adequately. When the inductor is not designed for use on printed boards, this shall be clearly stated in the detail specification.
4.3.3 Mounting
The detail specification shall specify the method of mounting to be recommended for normal use and the method that is mandatory for the application of the vibration and shock tests. The design of the inductor can be such that special mounting fixtures are required in its use. In this case, the detail specification shall describe the mounting fixtures and they shall be used in the application of shock and vibration tests. The specified heat sink shall be used in the application of the endurance test.
4.3.4 Ratings and characteristics
The ratings and characteristics shall be in accordance with the relevant clauses of this specification. Additional characteristics may be listed when they are considered necessary to specify adequately the inductor for design and application purposes.
4.4 Insulated inductors
Insulated inductors may be built either with a housing, or with isolated wires whose isolation provides basic insulation, e.g. TIW, FIW-wires, PVC-isolated wires, wires in insulation sleeves or the like. The isolated wires or the insulating materials used shall be in accordance with relevant IEC standards.
Instead of fulfilling requirements for clearance and creepage inside inductors, the windings may be insulated by potting or insulation sleeves or the windings may be built from wires with basic insulation like TIW, FIW, PVC-isolated wires or the like.
Insulation materials used between terminals and windings, for housing or potting shall be certified to a minimum rating of V-2, VTM-2 or HF-2 in accordance with IEC 60695-11-10 and IEC 60695 ‑11‑20 (or UL 94) at the appropriate minimum thickness, which is determined by the smallest thickness of insulation in direct contact with a conductor.
4.5 Marking Necessary marking in accordance with the relevant specifications shall be prescribed in the detail specification. Deviations from these requirements shall be listed separately and the reason for them shall be stated specifically in the detail specification.