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 µH 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 Ω 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 ©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). ©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