Corporate Office
Bel Fuse Inc.
198 Van Vorst Street, Jersey City, NJ 07302-4496
Tel: 201-432-0463
Fax: 201-432-9542
E-Mail: BelFuse@belfuse.com
Internet: http://www.belfuse.com
Far East Office
Bel Fuse Ltd.
8F/8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel: 852-2328-5515
Fax: 852-2352-3706
European Office
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Preston PR1 8UD
Lancashire, U.K.
Tel: 44-1772-556601
Fax: 44-1772-888366
defining a degree of excellence
ISDN TRANSFORMERS
Through Hole - Single Package
0.530 (14.12)
Max
0.40(10.16)
Max
0.120(3.05)
0.558
(14.17)
Max
0.40
(10.16)
0.40
(10.16)
0.20
(5.08)
Six Pins
Part Number
bel
Date
Code
3
5
6
7
2
8
1
4
Pri
Sec
SINGLE
Schematic
A
SINGLE
Schematic
B
4
5
6
1
2
3
7
4
5
6
Sec
Pri
Sec
Pri
SINGLE
Schematic
C
1
2
3
MECHANICALS
SCHEMATICS
0.120(3.05)
0.40
(10.16)
0.10(2.54)
0.40
(10.16)
0.20
(5.08)
0.40(10.16)
Max
0.558
(14.17)
Max
0.530(14.12)
Max
Eight Pins
Part Number
bel
Date
Code
* High Pot 2000 Vrms.
* Excellent Longitudinal
Balance.
Bel offers a line of single,
ISDN transformers available
in a through hole cost
effective packaging.
Integrated Circuit
Manufacturer
ISDN Integrated Circuit Component Reference
2.5
2.3
2.4
2.5
110
80
40
140
100
100
100
100
22
22
22
22
8 Pin/A
6 Pin/B
6 Pin/B
7 Pin/C
Turns
Ratio
+/- 2%
Part
Number
Primary
Inductance
OCL
(mH) Min
Leakage
Inductance
L
L
(
H) Max
Interwinding
Capacitance
(pF) Max
CD
primary
(pF) Max
Package
and
Schematic
Primary
Secondary
DCR (ohms)
+/- 25%
5.8
4.0
2.4
4.2
0559-6100-00
0559-6100-01
0559-6100-02
0559-6100-04
1:2.5
1:2
1:1
1:1.8
8-40
15
5
15
0.40
(10.16)
0.20 (5.08)
0.10 (2.54)
0.20 (5.08)
0.530 (14.12)
Max
0.40(10.16)
Max
0.120(3.05)
0.558
(14.17)
Max
Leads on all through
hole components
are 22 AWG
Solderable
Seven
Pins
IC Part
Number
Bel Fuse Component Part Number
Transmit
Receive
T7250, T7252, T7259
29C53
MTC-2072
MT 8930
MC145474, MC145475
TP3420, TP3421
5420
PEB 2080, 2081, 2085
AT&T
Intel
Mietec
Mitel
Motorola
National
SGS Thomson
Siemens
0559-6100-00
0559-6100-04
0559-6100-01
0559-6100-01
0559-6100-02
0559-6100-01
0559-6100-01
0559-6100-01
0559-6100-00
0559-6100-04
0559-6100-01
0559-6100-01
0559-6100-02
0559-6100-01
0559-6100-01
0559-6100-01
Part Number
bel
Date
Code
0.40
All dimensions are in inches(mm).
Dimension Tolerance
is +/- 0.02(0.51)
unless otherwise specified.
TM0033
ELECTRICALS
@ 25
O
C.
T303
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