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 • • • • 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
TM00133
•
•
ELECTRICAL SPECIFICATIONS AT 25° C
DCR Primary Inductance1 mH min Leakage Inductance2 µH max Pri 2 3 0.8 1.104
Turns Ratio ± 2% Part Number Pri : Sec3 2771B 2771C 1 : 1.14 CT 1 CT : 2 CT4
Ω
max Sec3 0.8 2.25
Interwinding Capacitance pF max
1.75 3.154
80 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 2771C
4
5
4 2
CT
5 7 6 8 1 CT : 2 CT
7 6
3 1
1 1 : 1.14 CT
8
©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
TM00133
T1/E1 Surface Mount Transformers
MECHANICAL
2771B 2771C
0.160 (11.68)
0.590 (14.99) MAX 87 65
0.120 (3.05)
0.495 0.430 (12.57)(10.92) MAX MAX 1234 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
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
T1-76
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