User Tools

Site Tools


frm20-5-15

FRM20/5/15

Stan Zurek, FRM20/5/15, Encyclopedia Magnetica, E-Magnetica.pl
reviewed by Jeanete Leicht, 2014-01-21

FRM20/5/15 (also FRM20-5-15 or FRM 20 x 5 x 15) - a type of frame core made of soft ferrite, supplied by Ferroxcube.1)

The numbers refer to the dimensions of the frame, i.e. 20 = 20 mm.

Helpful page? Support us!

All we need is just $0.10 per month. Come on… ;-)

The core comprises a cuboid bar, which slides into a bobbin. The outer frame of the core is assembled on top of the bobbin.

The bar has a symbol BAR20/3/5.5 (or BAR20-3-5.5).

The relative winding width is longer than in most of other ferrite cores, which allows for the bobbin to have multiple sections. The manufacturer offers the multiple-chamber bobbin, but there is no indication of how all the parts should be held together (e.g. a clip).

As of 2013 the core was offered in two materials: 3C90 and 3C91.

Images

FRM20 with the bar inserted into a bobbin
Disassembled FRM20

Core parameters

The table below lists the core set parameters as given by Ferroxcube.2)

Symbol Parameter Value
Σ(l/A) core factor (C1) 3.29 mm-1
Ve effective volume 655 mm
le effective length 46 mm
Ae effective area 14 mm2
Amin minimum area 7.4 mm2
m mass of frame 2.1 g
m mass of bar 1.5 g

The values were measured for frame with a bar core, without an air gap.3)

Material grade AL value effective permeability μe
3C90 500 nH +/- 25% 1310
3C91 600 nH +/- 25% 1570

Data sheets

Ferrite core FRM20/5/15 Ferroxcube

Copyrights © Ferroxcube

See also

References


1), 2), 3) Ferroxcube, Soft Ferrites and Accessories, Data Handbook, 2013
frm20-5-15.txt · Last modified: 2021/04/17 10:22 by stan_zurek

Disclaimer: This website is provided only for educational purposes. In no event the providers can be held liable to any party for direct, indirect, special, incidental, or consequential damages arising out of the use of this information.
Privacy and cookie policy (GDPR, etc.)