HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Shielded Transformers * Operate as line-interface pulse transformers in DS1 and CEPT applications * Interwinding electrostatic shield for minimum capacitance and maximum EMI suppression * Operating temperature range: -40 C to +85 C TM00125 * 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 ELECTRICAL SPECIFICATIONS AT 25 C Leakage Inductance2 H max Typical Effective Distributed Capacitance pF Interwinding Capacitance pF max (4-6) (3-1) (3-1) (3-1) to (4-6)3 1.58 0.50 3.3 50 10 850 0.87 0.78 2.0 - 5 1000 Nominal Turns Ratio 2% Inductance 1 mH Min (3-1) : (4-6) (3-1) (3-1) 2745H2 1 : 1.36 CT 1.24 2745AK2 1 : 1.14 CT 1.25 Part Number DCR max Minimum Interwinding Breakdown Voltage Vrms 1. measured at 10 kHz, 0.1 Vac 2. measured at 100 kHz, 0.1 Vac 3. with 2 grounded SCHEMATIC 2745H2 2745AK2 4 3 5 CT 6 1 2 1:N (c)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 T1-55 HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Shielded Transformers TM00125 MECHANICAL 2745H2 2745AK2 0.56 (14.22) MAX 0.46 (11.68) MAX TERMINAL 1 IDENTIFIER 0.35 (8.89) MAX 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.150 (3.81) 0.110 (2.79) 0.010 (0.25) 1 2 3 6 5 4 0.250 (6.35) Unless otherwise specified, dimensions are nominal and in inches (millimeters). (c)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 T1-56