Datasheet

2008 Sep 01 1683
Ferroxcube
Ferrite toroids TN25/15/10
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: 2000 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) 1.23 mm
−1
V
e
effective volume 2944 mm
3
I
e
effective length 60.2 mm
A
e
effective area 48.9 mm
2
m mass of core ≈ 15 g
Fig.1 TN25/15/10 ring core.
Dimensions in mm.
handbook, halfpage
;;
;;
;;
;;
CBW306
14.0 ±0.6
10.6
±0.5
coating PA11
(≈0.3)
25.8 ±0.7
Ring core data
Properties of cores under power conditions
GRADE
A
L
(nH)
µ
i
TYPE NUMBER
3F3 1840 ± 25% ≈ 1800 TN25/15/10-3F3
3C90 2350 ± 25% ≈ 2300 TN25/15/10-3C90
3C11 4400 ± 25% ≈ 4300 TN25/15/10-3C11
3E25 5620 ± 25% ≈ 5500 TN25/15/10-3E25
GRADE
B (mT) at CORE LOSS (W) at
H = 250 A/m;
f = 25 kHz;
T = 100 °C
f=25kHz;
=200mT;
T = 100 °C
f = 100 kHz;
= 100 mT;
T = 100 °C
f = 400 kHz;
=50mT;
T = 100 °C
3C90 ≥320 ≤ 0.33 ≤ 0.33 −
3F3 ≥320 −≤ 0.32 ≤ 0.56
B
ˆ
B
ˆ
B
ˆ