HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Hardened Transformers
•
Designed to operate at the DS1 rate of 1.544 Mbits/s
as a line interface transformer
Only difference between 2745F and 2745F2 is the
terminal length
Winding (3-1) can handle a 6 A surge current for 1
second
Designed for remote powering with simplex-feed
current
•
•
•
•
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
TM00128
•
•
•
ELECTRICAL SPECIFICATIONS AT 25° C
Part Number
Nominal
Turns Ratio
±2%
Inductance
mH Min
1
DCR
Ω
Leakage
Inductance
µH max
(4-6)
(3-1)
(3-1) : (6-4)
2745F
2745F2
1CT : 2
1CT : 2
(3-1)
3.15
3.15
max
0.65
0.65
min
0.42
0.42
max
5.2
5.2
Minimum
Interwinding
Breakdown
Voltage
Vrms
min
4.3
4.3
(3-1)
1.7
1.7
850
850
1. measured at 10 kHz, 0.1 Vac
SCHEMATIC
2745F
2745F2
3
CT 2
1
1 CT : 2
6
4
©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
T1-63
BEL [ BEL FUSE INC. ]
