HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Shielded Transformer TM00124 • Designed for DS1, DS1C, and CEPT applications • Operating temperature range: -40° C to +85° C • Electrostatic shield provides improved longitudinal signal suppression • Meets IEC 695, 2-2 flammability requirements • • 2741J has an internal connection to terminal 8; do not use 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 Turns Ratio ±2% Part Number DCR Ω max Primary Inductance1 mH min Pri : Sec Pri Sec Leakage Inductance2 µH max Interwinding Capacitance4 pF max Minimum Interwinding Breakdown Voltage Vrms 2741J 1 CT3 : 1.37 0.923 0.83 1.25 2.03 8 850 2741K 1:1 1.25 0.7 0.85 2.0 3.5 500 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 4 6 CT PRIMARY 5 2 7 1 PRIMARY SECONDARY 2 7 4 5 1 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 T1/E1 Through Hole Shielded Transformer TM00124 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) 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.100 (2.54) 1 2 3 4 0.250 (6.35) 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 T1-54