2745B Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Transformer

HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Transformer
TM00115
• Operates as a line-interface pulse transformer in
DS1 and CEPT applications
• Winding (3-2) (2-1) is highly balanced
• Designed for automatic machine placement into
printed wiring boards
• Recommended replacement is 2745AF2
• 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
Part
Number
Turns Ratio
± 2%
(3-1) : (4-6)
Inductance¹
mH min
(3-1)
2745B
1CT : 2 CT
3.5
1. measured at 10 kHz, 0.1 V
2. measured at 100 kHz, with (4-6) shorted
DCR
Ω
max
(3-1) (4-6)
4.9
10.2
Leakage Inductance ²
µH max
(3-1)
7.0
Interwinding
Capacitance
pF typ
(3-1) and (4-6)
110
MInimum
Interwinding
Breakdown
Voltage
Vrms
850
SCHEMATIC
2745B
3
4
CT 2
5 CT
1
6
1 CT : 2 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 [phone] • Fax [phone] • www.belfuse.com
T1-35