Ferroxcube
Gapped ferrite toroids
RING CORES (TOROIDS)
Effective core parameters
SYMBOL
Σ(I/A)
V
e
I
e
A
e
m
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.
Dimensions in mm.
TN20/10/6.4
20.6
±
0.6
PARAMETER
core factor (C1)
effective volume
effective length
effective area
mass of core
VALUE
1.43
1330
43.6
30.5
≈
6.9
UNIT
mm
−1
mm
3
mm
mm
2
g
(≈0.3)
9.2
±
0.4
coating PA11
6.85
±
0.35
MFP041
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.
Fig.1 TN20/10/6.4 ring core.
Ring core data
A
L
(1)
(nH)
68
±
15%
81
±
15%
87
±
15%
96
±
15%
109
±
15%
Note
1. Winding equally distributed over the circumference.
Properties of cores under power conditions
B (mT) at
GRADE
H = 1200 A/m;
f = 10 kHz;
T = 100
°C
∼
400
f = 100 kHz;
ˆ
B = 100 mT;
T = 100
°C
≤
0.12
CORE LOSS (W) at
f = 100 kHz;
ˆ
B = 200 mT;
T = 100
°C
≤
0.80
µ
e
≈
125
≈
147
≈
160
≈
173
≈
200
GRADE
3C20
TYPE NUMBER
TN20/6.4-3C20-A68
TN20/6.4-3C20-A81
TN20/6.4-3C20-A87
TN20/6.4-3C20-A96
TN20/6.4-3C20-A109
3C20
2008 Sep 01
1485
Ferroxcube
Gapped ferrite toroids
DATA SHEET STATUS DEFINITIONS
DATA SHEET
STATUS
Preliminary
specification
Product specification
PRODUCT
STATUS
Development
DEFINITIONS
TN20/10/6.4
This data sheet contains preliminary data. Ferroxcube reserves the right to
make changes at any time without notice in order to improve design and
supply the best possible product.
This data sheet contains final specifications. Ferroxcube reserves the right
to make changes at any time without notice in order to improve design and
supply the best possible product.
Production
DISCLAIMER
Life support applications
These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal injury. Ferroxcube customers
using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Ferroxcube
for any damages resulting from such application.
PRODUCT STATUS DEFINITIONS
STATUS
Prototype
Design-in
Preferred
Support
INDICATION
DEFINITION
These are products that have been made as development samples for the purposes of
technical evaluation only. The data for these types is provisional and is subject to
change.
These products are recommended for new designs.
These products are recommended for use in current designs and are available via our
sales channels.
These products are
not
recommended for new designs and may not be available
through all of our sales channels. Customers are advised to check for availability.
2008 Sep 01
1486
PCB Design
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