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. 07.00
TM00145
T1-99
Miniature Dual Turns Ratio Surface Mount Transformers
SCHEMATICS
ELECTRICAL SPECIFICATIONS at 25 C
2795G
2795N
2795T
2795Y
1
2
3
4
5
6
Transformers provide a dual turns ratio for DS1,
CEPT 75 and CEPT 120 line interface functions
Maximum inductance unbalance of center-tapped
winding is 0.2%
Metallic surge voltage capability for 2795Y is 5000V
peak
Minimum interwinding breakdown voltage of 1500
Vrms
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
For 2795T and 2795Y application note refer to document
TM00145B
For 2795N application note refer to document TM00145A
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Note: Pins 2 and 3 must be connected externally.
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. 07.00
TM00145
T1-100
Miniature Dual Turns Ratio Surface Mount Transformers
MECHANICAL
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
0.347
[8.80]
max
0.055
[1.40]
0.265
[6.73]
max
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]
No metallization
or solder mask
in cross-hatched
designated area
Suggested PCB Pad Layout
Note: Unless otherwise specified, dimensions
are nominal and in inches [millimeters].
2795G
2795N
2795T
2795Y
Supplementary Information
Operating Temperature Range 40 C to +85 C
Safety Agency Compatibility
Underwriters Laboratories, Inc. UL
1459
Surge Voltage Capability
10/700 s; 10 repetitions of alternating polarity
Metallic Voltage
2500 V peak generator output, 25
generator resistance
Longitudinal Voltage
2500 V peak generator output, 25
generator resistance
Flammability Compliance
IEC-695, 2-2 (needle flame test), materials are UL 94 VO approved
Qualification Compliance
Bellcore TR-TSY-000357-1(shock, vibration, temperature cycling, temperature-humidity-bias)
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
Standard printed-wiring board assembly and cleaning techniques
Standard solder reflow techniques
Machine placement (recommendation: locate by terminals, not body)
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