Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
HIGH FREQUENCY MAGNETICS
2000 Bel Fuse Inc. Specifications subject to change without notice. 04.00
TM00142
T1-93
T1/E1 Miniature Surface Mount Tranformers
SCHEMATICS
ELECTRICAL SPECIFICATIONS at 25 C
Meet pulse template and return loss requirements of
T1/E1 interface circuits
Minimum interwinding breakdown voltage of 1500
Vrms
Maximum inductance unbalance of center-tapped
windings is 0.2%
2795AB
2795B
2795C
2795D
2795P
2795R
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Operating temperature range: -40
C to +85
C
Meets IEC 695, 2-2 flammability requirements
PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
Reliability testing: shock, vibration, temperature cycling,
temperature - humidity - bias
3
CT 5
1
4
6
Primary
Secondary
4
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3
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Secondary
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
HIGH FREQUENCY MAGNETICS
2000 Bel Fuse Inc. Specifications subject to change without notice. 04.00
TM00142
T1-94
T1/E1 Miniature Surface Mount Tranformers
MECHANICAL
Supplementary Information
Safety Agency Compatibility
Underwriters Laboratories, Inc. UL 1950
Surge Voltage Capability
10/700 s; 10 repetitions of alternating polarity, generator output: peak voltage, 25
source
Flammability Compliance
IEC-695, 2-2 (needle flame test), materials are UL 94 VO approved
Simulation Model
SPICE computer simulation file available on request
Surface-Mount Packaging
Tape and Reel; 16 mm wide by 12 mm pitch; 13 inch OD; 4 inch ID
650 transformers per reel, maximum
Meets ANSI/EIA 481-2 Carrier Tape Standards--JEDEC SO package
Terminal Lead Coplanarity
0.004 inch [0.10 mm]
PWB Process Capability
Machine placement (recommendation: locate by terminals, not body)
0.265
[6.73]
ref
A
6
5
4
1
2
3
Terminal 1 ID
0.020 [0.51]
0.073 [1.85]
A
0.240
[6.10] max
0.350
[8.90]
max
0.055
[1.40]
0.265
[6.73]
max
0.015
[0.40]
R 0.023
[0.60]
0/8
No metallization
or solder mask
in cross-hatched
designated area
0.033 [0.84]
0.065
[1.65]
0.364
[9.25]
0.057
[1.45]
0.234
[5.95]
0.186
[4.72]
0.073 [1.85]
0.040 [1.02]
Suggested PCB Pad Layout
Note: Unless otherwise specified, dimensions
are nominal and in inches [millimeters].
2795AB
2795B
2795C
2795D
2795P
2795R
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