HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Shielded Transformer
• • Designed for DS1, DS1C, and CEPT applications Electrostatic shield provides improved longitudinal signal suppression 2741J has an internal connection to terminal 8; do not use • • • • • 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
TM00124
ELECTRICAL SPECIFICATIONS AT 25° C
DCR Ω max
Turns Ratio ±2% Part Number Pri : Sec
Primary Inductance1 mH min Pri
Leakage Inductance2 µH max Sec
Interwinding Capacitance4 pF max
Minimum Interwinding Breakdown Voltage Vrms
2741J 2741K
1 CT3 : 1.37 1:1
0.923 1.25
0.83 0.7
1.25 0.85
2.03 2.0
8 3.5
850 500
1. measured at 10 kHz, 0.1 Vac 2. measured at 100 kHz, 0.1 Vac 3. connect 2 and 6 4. with pin 1 grounded
SCHEMATIC
2741J 2741K
S 3 6 CT 2 7 PRIMARY 5 1 SECONDARY 4
4
5
2
7
1 PRIMARY SECONDARY
©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 T1-53
HIGH FREQUENCY MAGNETICS
TM00124
T1/E1 Through Hole Shielded Transformer
MECHANICAL
2741J 2741K
0.56 (14.22) MAX 0.46 (11.68) MAX
TERMINAL 1 IDENTIFIER
0.35 (8.89) MAX
0.155 (3.94)
0.100 (2.54)
0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED)
1234 0.250 (6.35) 8 76 5
Unless otherwise specified, dimensions are nominal and in inches (millimeters).
©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
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 G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com
T1-54
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