HIGH FREQUENCY MAGNETICS
T1/E1 Single THT Shielded Hardened Transformer
TM00122
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Designed for T1 carrier applications at 1.544 Mbps
Typical application is to isolate telecom equipment
such as CSUs and office repeaters from the T1line
Maximum ac current rating is 140mA for winding (6 - 7)
and 280mA for winding (4 - 1)
Winding (4 - 1) is hardened to handle 6 amp current for
one second with no damage
•
Compatible with water-soluble flux, total-immersion
cleaning, and machine insertion
Shielded transformer reduces EMI
Designed for 100Ω terminating impedances
Minimum interwinding breakdown voltage of 1000 Vrms
Meets IEC-695, 2-2 flammability requirements
Qualified per Bellcore TR-TSY-000357-1
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ELECTRICAL SPECIFICATIONS at 25° C
DCR
Ω
max
Turns Ratio
± 2%
Part Number
Pri : Sec
Primary
Inductance*
mH min
Leakage
Inductance
µ
H max
Pri
Interwinding
Capacitance
pFmax
Sec
5 with terminal 5
grounded
2664AM
1 : 1 CT
1.5
3.5
1.0
0.5
* Measured at 10 kHz, 0.1 Vac
SCHEMATIC
2664AM
6
S
4
2
CT
3
7
Primary
5
1
Secondary
Note: Noise suppression is improved by connecting
the shield, terminal 5, to equipment frame ground.
©2000 Bel Fuse Inc.
Specifications subject to change without notice. 09.00
Bel Fuse Inc.
198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T1-49
HIGH FREQUENCY MAGNETICS
TM00122
T1/E1 Single THT Shielded Hardened Transformer
MECHANICAL
2664AM
0.31 [7.87]
max
0.110
[2.79]
0.100 [2.54]
centers
0.500 [12.7]
max
0.023 [0.58] Sq, typ,
Phosphor bronze
solder-coated
Terminal 1 ID
1
2
3
4
0.400
[10.16]
max
0.250
[6.35]
8
7
6
5
Note: Unless otherwise specified, dimensions
are nominal and in inches [millimeters].
©2000 Bel Fuse Inc.
Specifications subject to change without notice. 09.00
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
T1-50
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