Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2001 Bel Fuse Inc. Specifications subject to change without notice. 02.01
TM01102
page 1
ELECTRICAL SPECIFICATIONS AT 25 C
SCHEMATIC
HIGH FREQUENCY MAGNETICS
T1/E1 Surface Mount Transformer
Operates as a pulse transformer at the T1 rate of
1.544 Mb/s and the E1 rate of 2.048 Mb/s
Provides voltage transformation and impedance
matching for line-interface applications
2771G
Operating Temperature Range: -40C to +85C
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
All windings are hardened to handle a 6A surge for 1
second
Recommended drop-in replacement for non-
hardened applications is 2779C
1. With 6 and 7 connected.
2. 10 kHz, 0.1 Vac
3. 100 kHz, 0.1 Vac
4
1
5
7
6
8
CT
1 : 1.37CT
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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 F23, Preston
Lancashire, PR1 8UD, U.K.
Tel
44-1772-556601
Fax 44-1772-888366
www.belfuse.com
2001 Bel Fuse Inc. Specifications subject to change without notice. 02.01
TM01102
page 2
HIGH FREQUENCY MAGNETICS
T1/E1 Surface Mount Transformer
MECHANICAL
2771G
NOTE: Unless otherwise specified, dimensions are nominal and in inches (millimeters).
0.590 (15.0)
MAX
0.430
(10.92)
MAX
0.495
(12.57)
MAX
0.160 (4.06)
REF
0.120 (3.05)
REF
TERMINAL 1
IDENTIFIER
0.395
(10.03)
MAX
0.100 (2.54)
0.024 (0.061)
(PHOSPHOR BRONZE,
SOLDER COASTED)
0.004 (0.10)
8 EDGES
COMPONENT
CENTER
0.008 (0.203)
2 PLACES
0.045
(1.14)
0.120 (3.05)
0.255
(6.48)
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