Dumb-bell-configured powder iron cores are intended to be used as magnetic circuits of chokes that are rated for high currents in power electronics applications not having high requirements for a level of electromagnetic emission. Low cost of layer winding on dumb-bell core permits to make significantly lower price of finished choke.
Standard Sizes of Cores
Standard sizes of dumb-bell cores made of powder iron .
| Standard Size | AL, nH |
OD1, mm |
OD2, mm |
ID, mm |
T, mm |
L, mm |
Window Volume, cm³ |
| KI 36,1*23,8*12,7 | 85 | 36,1 | 12,7 | 4,37 | 3,96 | 23,8 | 1,84 |
| KI 36,1*33,3*12,7 | 60 | 36,1 | 12,7 | 4,37 | 3,96 | 33,3 | 2,95 |
| KI 46,9*31,8*15,9 | 100 | 46,9 | 15,9 | 5,56 | 4,75 | 31,8 | 3,43 |
| KI 46,9*41,3*15,9 | 80 | 46,9 | 15,9 | 5,56 | 4,75 | 41,3 | 4,9 |
| KI 63,5*34,9*19,1 | 130 | 63,5 | 19,1 | 6,6 | 4,75 | 34,9 | 5,66 |
| KI 63,5*47,6*19,1 | 95 | 63,5 | 19,1 | 6,6 | 4,75 | 47,6 | 8,49 |
* — Approximate value of Al is shown.
Designations in Design Documentation
Designations of powder iron dumb-bell cores in design documentation.
KI 36,1*23,8*12,7
KI — Dumb-bell configured core made of powder iron core
36,1 — dumb-bell core cap’s diameter OD1, mm
23,8 — dumb-bell core’s height ID, mm
12,7 — dumb-bell core leg’s diameter OD2, mm.
