HIGH FREQUENCY MAGNECTICS
T1/E1 Single Through Hole Transformers
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Operate as line-interface pulse transformers in DS1
and CEPT applications
2662B and 2662B2 contain specific interwinding
insulation to minimize capacitance
Winding (3-2) (2-1) is highly balanced; Inductance
unbalance is 0.1%, max
Only difference between the 2662B and 2662B2 is
the terminal length; only difference between the
2662H and 2662H2 is the terminal length
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•
•
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Operating Temperature Range: -40° 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
Recommended transformer for new through-hole
applications is 2745AF2
TM00154
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ELECTRICAL SPECIFICATIONS AT 25° C
Turns Ratio
±2%
Part Number
(3-1) : (6-4)
2662B
2662B2
2662H
2662H2
1CT : 2 CT
1CT : 2 CT
1 CT : 2 CT
1 CT : 2 CT
(3-1)
3.5
3.5
3.5
3.5
(3-1)
4.0
4.0
4.8
4.8
Inductance
mH min
1
DCR
Ω
max
(6-4)
20.2
20.2
10.2
10.2
Leakage
Inductance
µH max
2
(3-1)
7.0
7.0
7.0
7.0
Direct
Capacitance
pF
(3-1) and (6-4)
40 max
40 max
90 typ
90 typ
ET
constant
V-µs min
(3-1)
48
48
48
48
Minimum
Interwinding
Breakdown
Voltage
Vrms
1000
1000
1500
1500
1. measured at 10 kHz, 0.1 Vac
2. measured at 100 kHz, 0.1 Vac
SCHEMATIC
2662B
2662B2
2662H
2662H2
3
6
CT 2
5 CT
1
1 CT : 2 CT
4
©2001 Bel Fuse Inc. Specifications subject to change without notice. 10.01
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T1-25
BEL [ BEL FUSE INC. ]
