Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
MODEM MAGNETICS
2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00
TM00405
T4-11
V.90 Modem Transformer
Provides isolation and balance while minimizing
signal distortion and insertion loss in high-speed
modem applications
Designed to match a 600
line to a 374
load
with no direct current in the windings
Approved by UL and CSA
Minimum interwinding breakdown voltage of 1000 Vrms
Qualified per Bellcore TR-TSY-000357-1
SCHEMATIC
ELECTRICAL SPECIFICATIONS at 25 C
TYPICAL SPICE TRANMISSION MODEL
107
2.8 mH
114
6
4
20 pF
18 H
20 pF
3
1
60 k
1
3
6
4
Primary
Secondary
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2791C
CORPORATE
Bel Fuse Inc.
198 Van Vorst Street
Jersey City, NJ 07302
Tel
201-432-0463
Fax
201-432-9542
www.belfuse.com
FAR EAST
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel
852-2328-5515
Fax 852-2352-3706
www.belfuse.com
EUROPE
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel
44-1772-556601
Fax 44-1772-888366
www.belfuse.com
MODEM MAGNETICS
2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00
TM00405
T4-12
V.90 Modem Transformer
MECHANICAL
0.023 [0.58]
Square,
Phosphor Bronze,
Solder-Coated
0.110 [2.79]
0.48 [12.19]
max
1
3
6
4
0.69 [17.53] max
0.450 [11.43]
0.225
[5.72]
Terminal 1
Identifier
0.275
[5.99]
0.550
[13.97]
0.71
[18.03]
max
Note: Unless otherwise specified, dimensions
are nominal and in inches [millimeters].
2791C
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