2008 Sep 01

1609

Ferroxcube

Ferrite toroids

TN9/6/3

RING CORES (TOROIDS)

Effective core parameters

Coating

The cores are coated with polyamide 11 (PA11), flame

retardant in accordance with “UL 94V-2”; UL file number

E 45228 (M).

The colour is white.

Maximum operating temperature is 160

°C.

Isolation voltage

DC isolation voltage: 1000 V.

Contacts are applied on the edge of the ring core, which is

also the critical point for the winding operation.

SYMBOL

PARAMETER

VALUE

UNIT

Σ(I/A)

core factor (C1)

5.17

effective volume

102

effective length

22.9

mm

effective area

4.44

m

mass of core

≈ 0.5

g

Fig.1 TN9/6/3 ring core.

Dimensions in mm.

handbook, halfpage

;;

;;

;;

;;

CBW315

5.4

±0.3

3.4

±0.25

coating PA11

(

≈0.3)

9.5

±0.3

Ring core data

GRADE

(nH)

TYPE NUMBER

4C65

30

± 25%

≈ 125

TN9/6/3-4C65

4A11

170

± 25%

1.

Old permeability specification maintained.

TN9/6/3-4A11

2.

Due to the rectangular BH-loop of 3R1, inductance values strongly depend on the magnetic state of the ring core and measuring

−≈ 800

TN9/6/3-3R1

3F3

440

± 25%

≈ 1800

TN9/6/3-3F3

3C90

560

± 25%

≈ 2300

TN9/6/3-3C90

3E25

1340

± 30%

≈ 5500

TN9/6/3-3E25

WARNING

Do not use 3R1 cores close to their mechanical resonant frequency. For more information refer to “3R1” material

specification in this data handbook.