BS EN IEC 63093-5:2018

What is BS EN IEC 63093-5- Limits of surface irregularities of EP-cores about? 

BS EN IEC 63093 is an international standard that discusses ferrite cores. The main objective of the BS EN IEC 63093 series is to ensure ferrite cores meet the required quality and performance levels so as to effectively avoid electromagnetic interference.  

BS EN IEC 63093-5 is the fifth part in the BS EN IEC 63093 series that specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of EP-cores made of ferrite, the essential dimensions of coil formers to be used with them, and the locations of their terminal pins on a 2,50 mm printed wiring grid in relation to the base outlines of the cores and the effective parameter values to be used in calculations involving them. 

Who is BS EN IEC 63093-5- Limits of surface irregularities of EP-cores for? 

BS EN IEC 63093-5 on EP-cores is relevant to: 

• Ferrite core manufacturers 
• EP-cores manufacturers and suppliers 
• Electrical components and magnetic circuits manufacturers 
• Transformer and inductor manufacturers 
• Mechanical engineers 
• Electrical engineers 
• Product design engineers 

Why should you use BS EN IEC 63093-5- Limits of surface irregularities of EP-cores? 

EP cores are round centre-post cubical shaped cores used in power inductors and transformers, that enclose the coil completely. The shape of these cores is a key feature that reduces the effect of air gaps, thus offering maximum volume to surface ratio. 

BS EN IEC 63093-5 gives guidance on allowable limits of surface irregularities applicable to RM-cores in accordance with the relevant generic specification. 

BS EN IEC 63093-5 provides the best guidance and primary dimensions on EP-cores, parameters, pin locations, crystallites, and area with length reference for visual inspection. 

BS EN IEC 63093-5 also helps identify surface defects in pot-cores, such as chips, cracks, ragged edges, pores and pull-out, which helps in mitigating overall application performance concerns. The limits of these surface irregularities are helpful to determine the extent of damage due to which product failure can occur.  

Compliance with the best industry requirements on dimensions provided by BS EN IEC 63093-5 ensures mechanical interchangeability of complete assemblies and wound coil formers. 

What’s changed since the last update? 

BS EN IEC 63093-5:2018 supersedes BS EN 62317-5:2015, which is withdrawn. This edition includes the following significant technical change with respect to IEC 623175:2015: 

• Addition of the limits of surface irregularities