HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Shielded Transformers TM00123 • Designed for DS1, DS1C, and CEPT applications • Operating temperature range: -40° C to +85° C • Electrostatic shield provides improved longitudinal signal suppression and EMI reduction • Meets IEC 695, 2-2 flammability requirements • • Maximum inductance unbalance of center-tapped windings is 0.1% 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 Number1 Turns Ratio ± 2% Primary Inductance2 mH min DCR Ω max Leakage Inductance µH max Pri : Sec Pri Sec Interwinding Capacitance3 pF max Minimum Interwinding Breakdown Voltage Vrms Non-Shielded Version 2741B 1CT : 2CT 4.5 4.5 3.7 7.2 10 1000 2745AF2 2741B2 1CT : 2CT 4.5 4.5 3.7 7.2 10 1000 2745AF2 2741G 1CT : 2CT 3.15 6.5 1.9 4.4 54 850 2745AF2 2741G2 1CT : 2CT 3.15 6.5 1.9 4.4 54 850 2745AF2 2741C 1 : 1.36CT 0.92 1.1 0.75 1.05 10 1000 2745CA2 2741C2 1 : 1.36CT 0.92 1.1 0.75 1.05 10 1000 2745CA2 2741H 1 : 1.37CT 0.92 2.5 0.83 1.43 54 850 2745CA2 2741H2 1 : 1.37CT 0.92 2.5 0.83 1.43 54 850 2745CA2 1. A "2" suffix indicates short terminals (see mechanical section) 2. measured at 10 kHz, 0.1 Vac 3. with terminal 1 grounded 4. There is an internal connection to terminal 8; do not use 2741C 2741C2 2741H 2741H2 SCHEMATICS S 2741B 2741B2 2741G 2741G2 3 2 6 S 4 5 3 6 2 7 1 Primary Secondary CT 4 7 Primary 1 5 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 T1-51 HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Shielded Transformers TM00123 MECHANICAL 2741B 2741C 2741G 2741H 2741B2 2741C2 2741G2 2741H2 0.56 (14.22) MAX 0.56 (14.22) MAX 0.46 (11.68) MAX 0.46 (11.68) MAX TERMINAL 1 IDENTIFIER TERMINAL 1 IDENTIFIER 0.35 (8.89) MAX 0.155 (3.94) 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.100 (2.54) 0.35 (8.89) MAX 0.110 (2.79) ±0.010 (0.25) 1 2 3 4 0.250 (6.35) 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.100 (2.54) 1 2 3 4 8 7 6 0.250 (6.35) 5 8 7 6 5 Unless otherwise specified, dimensions are nominal and in inches (millimeters). ©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 198 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 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 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 T1-52