HIGH FREQUENCY MAGNETICS
T1/E1 Dual Ratio Surface Mount Transformer
•
Operates at the T1 rate of 1.544 Mb/s and the E1 rate
of 2.048 Mb/s
Provides two ratios to handle both 75Ω and 120Ω
lines
Minimum Interwinding Breakdown Voltage of 1500
Vrms
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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
TM00135
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ELECTRICAL SPECIFICATIONS AT 25° C
DCR
Interwinding
Capacitance
pF max
Leakage
Inductance
3
µH max
Turns Ratio
±2%
Part Number
(4-1):(5-2)
(4-1):(5-8)
1
Inductance
2
mH min
Ω
max
(4-1)
(4-1)
(5-2)
(5-8)
1
(4-1) :
(5-2)
15
(4-1) :
(5-8)
1
23
(4-1)
4
(4-1)
5
Minimum
Interwinding
Breakdown
Voltage
Vrms
2771H
1 : 1.08
1 : 1.36
1.85
0.74
3.2
4.0
1
1.3
1500
1. connect 2 to 3
2. measured at 10 kHz, 0.1 Vac
3. measured at 100 kHz, 0.1 Vac
4. with (5-8) shorted and 2 & 3 connected
5. with (5-2) shorted
SCHEMATIC
2771H
4
5
2
3
1
1 : 1.08
1 : 1.36
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
T1-79
BEL [ BEL FUSE INC. ]
