BEL 2771C

HIGH FREQUENCY MAGNETICS
T1/E1 Surface Mount Transformers
•
Operate at the T1 rate of 1.544 Mb/s and the E1 rate
of 2.048 Mb/s
•
Split windings provide maximum application
flexibilty
Minimum interwinding breakdown voltage of 1500
Vrms
•
TM00133
•
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
ELECTRICAL SPECIFICATIONS AT 25° C
Turns Ratio
± 2%
Part Number
Pri : Sec3
DCR
Primary
Inductance1
mH min
Ω
Leakage
Inductance2
µH max
Interwinding
Capacitance
pF max
max
Pri
Sec3
2771B
1 : 1.14 CT
1.75
2
0.8
0.8
80
2771C
1 CT : 2 CT4
3.154
3
1.104
2.25
30
1. measured at 10 kHz, 0.1 Vac
2. measured at 100 kHz, 0.1 Vac
3. connect 6 to 7
4. connect 2 to 3
SCHEMATICS
2771B
4
2771C
5
4
5
7
2
7
3
6
1
8
CT
6
8
1
1 CT : 2 CT
1 : 1.14 CT
©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
T1-75
HIGH FREQUENCY MAGNETICS
T1/E1 Surface Mount Transformers
TM00133
MECHANICAL
2771B
2771C
0.160 (11.68)
0.590
(14.99)
MAX
0.120 (3.05)
8 7 6 5
0.495 0.430
(12.57)(10.92)
MAX MAX
1 2 3 4
TERMINAL 1
IDENTIFIER
0.395
(10.03)
MAX
0.004
8 EDGES
0.23 (0.58) X 0.100 (2.54) FOOT
(PHOSPHOR BRONZE,
SOLDER COATED)
0.100 (2.54) TYP
RECOMMENDED PCB PATTERN
COMPONENT CENTER
0.255
(6.48)
0.120 (3.05) TYP
0.045
(1.14)
TYP
0.008 (0.203)
2 PLACES
Unless otherwise specified, dimensions are nominal and in inches (millimeters).
©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
198 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
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
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
T1-76