Philips Components
Product specification
Ferrite ring cores (toroids)
TN13/7.5/5
RING CORES (TOROIDS)
Effective core parameters
13.0 ±0.35
handbook, halfpage
SYMBOL
PARAMETER
core factor (C1)
VALUE UNIT
Σ(I/A)
Ve
2.46
368
mm−1
mm3
mm
mm2
g
effective volume
effective length
effective area
mass of core
Ie
30.1
12.2
≈1.8
Ae
m
6.8 ±0.35
Coating
coating PA11
(≈0.3)
The cores are coated with polyamide 11 (PA11), flame
retardant in accordance with “UL 94V-2”.
5.4
±0.3
Isolation voltage
CBW313
DC isolation voltage: 1500 V.
Contacts are applied on the edge of the ring core, which is
also the critical point for the winding operation.
Dimensions in mm.
Fig.1 TN13/7.5/5 ring core.
Ring core data
AL
GRADE
µi
COLOUR CODE
TYPE NUMBER
(nH)
4C65
4A11
3F4
64 ±25%
360 ±25%
460 ±25%
900 ±25%
1000 ±25%
2200 ±25%
2810 ±30%
4340 ±30%
5095 ±30%
≈125
≈700
violet
TN13/7.5/5-4C65
TN13/7.5/5-4A11
TN13/7.5/5-3F4
TN13/7.5/5-3F3
TN13/7.5/5-3C85
TN13/7.5/5-3C11
TN13/7.5/5-3E25
TL13/7.5/5-3E5(1)
TL13/7.5/5-3E6(1)
pink
≈900
beige
3F3
≈1800
≈2000
≈4300
≈5500
≈8500
≈10000
blue
3C85
3C11
3E25
3E5
red
white
orange
yellow/white
purple/white
3E6
Note
1. Ring cores in grades 3E5 and 3E6 are lacquered (polyurethane) and have different dimensions:
Outside diameter = 12.75 ±0.4 mm; inside diameter = 7.25 ±0.35 mm; height = 5.25 ±0.3 mm.
Properties of cores under power conditions
B (mT) at
CORE LOSS (W) at
f = 100 kHz;
H = 250 A/m;
f = 25 kHz;
T = 100 °C
f = 25 kHz;
B = 200 mT;
T = 100 °C
f = 400 kHz;
B = 50 mT;
GRADE
ˆ
ˆ
ˆ
B = 100 mT;
T = 100 °C
T = 100 °C
3C85
≥320
≥320
≤0.06
≤0.07
≤0.04
−
3F3
−
≤0.07
1997 Nov 21
711