HIGH FREQUENCY MAGNECTICS
T1/E1 Through Hole Transformers
TM00117
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•
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Operates as a line-interface pulse transformer in
DS1 and CEPT applications
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Operating temperature range: -40° C to +85° C
Meets IEC 695, 2-2 flammability requirements
Designed for automatic machine placement into
printed wiring boards
PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
Only difference between the 2745G and 2745G3 is
the terminal length
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Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
ELECTRICAL SPECIFICATIONS AT 25° C
Minimum
DCR
Leakage
Inductance 2
µH max
Interwinding
Capacitance
pF typ
Interwinding
Breakdown
Voltage
Turns Ratio
± 2%
Inductance1
mH min
Ω
max
Part Number
Vrms
(3-1) : (4-6)
(3-1)
(3-1)
(4-6)
(3-1)
(3-1) and (4-6)
(3-1) and (4-6)
2745G
1 : 1.14CT
1 : 1.14CT
1.75
1.75
0.95
0.95
1.1
1.1
1.3
1.3
80
80
1000
1000
2745G3
1. measured at 10 kHz, 0.1 V
2. measured at 100 kHz, with (4-6) shorted
Typical Frequency and Time Response
Part Number
Terminating
Impedances
Bandwidth
(3 dB)
Droop
(350 ns pulse)
Risetime
Overshoot
2745G
10 Ω : 100 Ω
10 Ω : 100 Ω
1 kHz - 25 MHz
1 kHz - 25 MHz
14 ns
14 ns
0 %
0 %
0.1%
0.1%
2745G3
SCHEMATIC
2745G
2745G3
4
3
1
5 CT
6
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
T1-39
