HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Transformer
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•
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Operates at the DS1 rate of 1.544 Mbits/s
Provides high step-up ratio
Provides monitoring via winding (5-1)
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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
TM01103
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ELECTRICAL SPECIFICATIONS AT 25° C
Turns Ratio
±2%
Part Number
(6-8) : (5-1) : (4-2)
2741E2
1 : 2.42
1 : 2.42
Primary
Inductance
mH min
1
(4-2)
9.9
(6-8)
0.63
DCR
Ω
max
(4-2)
1.96
(5-1)
0.51
Leakage
Inductance
µH max
2
(4-2)
5.5
Interwinding
Capacitance
pF max
(6-8) & (4-2)
65
Minimum
Interwinding
Breakdown
Voltage
Vrms
850
1. Measured at 10 kHz., 0.1 Vac
2. Measured at 100 kHz
SCHEMATIC
2741E2
6
CT 7
8
4
3 CT
2
5
1
1CT : 3.55CT : 1
©2001 Bel Fuse Inc. Specifications subject to change without notice. 02.01
Bel Fuse Inc.
198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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HIGH FREQUENCY MAGNETICS
TM01103
T1/E1 Through Hole Transformer
MECHANICAL
2741E2
0.56 (14.22)
MAX
0.46 (11.68)
MAX
TERMINAL 1 IDENTIFIER
0.35 (8.89)
MAX
0.110 (2.79)
±0.010 (0.25)
0.100
(2.54)
0.023 (0.584) SQ TYP
(PHOSPHOR BRONZE,
SOLDER COATED)
1 2 3 4
0.250
(6.35)
8 7 6
5
Unless otherwise specified, dimensions are nominal and in inches (millimeters).
©2001 Bel Fuse Inc. Specifications subject to change without notice. 02.01
CORPORATE
Bel Fuse Inc.
198 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
FAR EAST
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
EUROPE
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite F23, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com
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