Range of dimension:

- strip width: minimum 3mm
- inside diameter: minimum 5mm
- outside diameter: minimum 8mm, maximum 1100mm


Toroidal cores tolerance (mm)
Outside diameter
Inside diameter
Height
Od
D
Id
D
H
10
0.4
10
0.30
0.3
25
0.5
25
0.40
0.3
50
1.0
50
0.50
0.4
80
1.0
80
0.75
0.5
100
1.0
100
0.80
0.5
160
2.0
160
1.30
0.8
200
2.5
200
1.50
1.5
320
2.5
320
2.00
2.0
500
3.5
500
2.50
2.5
800
5.0
800
3.50
800
7.5
800
5.00
4.0

Optional forms of finished core:

(1) uncut, non-impregnated.
(2) uncut, lightly impregnated with epoxy varnish.
(3) cut, fully impregnated with epoxy resin.
(4) multi-cut, fully imprenated with epoxy resin.
(5) assembled with plastic cases [pp, maximum working temperature 110thickness 0.4~0.8mm].
(6) green epoxy coating [maximum working temperature 180thickness 0.20~0.50mm].
(7) black epoxy paiting.

Material:

High quality crgo steels with low iron-loss and high permeability in thickness of 0.23mm, 0.27mm and 0.3mm.

Characteristic:

It is toroidal and wounded in the same direction of closed flux path, no magnetic leakage, so its magnetic performance is best. The coil winding is easy and high efficiency with toroidal winding machine.

Application:

Toroidal core is widely used in 50hz and 400hz transformers, current transformers, reactors, chokes and other magnetic components of electronic equipment.