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| HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Transformers * Operates as a line-interface pulse transformer in DS1 and CEPT applications Contains specific interwinding insulation to minimize capacitance Winding (3-2)(2-1) is highly balanced * * Designed for automatic machine placement into printed wiring boards Only difference between the 2745AF and 2745AF2 is the terminal length Reliability testing: Shock, vibration, temperature cycling, temperature - humidity - bias * * * * Operating temperature range: -40C to +85 C Meets IEC 695, 2-2 flammability requirements PWB Process Capability: standard printed wiring board assembly techniques, total-immersion cleaning TM00118 * * ELECTRICAL SPECIFICATIONS AT 25 C Turns Ratio 2% Inductance1 mH min DCR Leakage Inductance 2 H max Interwinding Capacitance pF max (3-1) and (4-6) 23 23 MInimum Interwinding Breakdown Voltage Vrms 1000 1000 Part Number max (3-1) 1.55 1.55 (4-6) 3.15 3.15 (3-1) : (4-6) 2745AF 2745AF2 1CT : 2 CT 1CT : 2 CT (3-1) 3.15 3.15 (3-1) 3.0 3.0 1. measured at 19 kHz, 0.1V 2. measured at 100kHz, with (4-6) shorted Typical Frequency and Time Response Terminating Impedances 100 : 400 Bandwidth (3 dB) 2 kHz - 21 MHz Risetime 17 ns Overshoot 0% Droop (350 ns pulse) 0.5% SCHEMATIC 2745AF 2745AF2 3 CT 2 1 1 CT : 2 CT 4 5 CT 6 (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 T1-41 HIGH FREQUENCY MAGNETICS TM00118 T1/E1 Through Hole Transformers MECHANICAL 2745AF 2745AF2 0.56 (14.22) MAX 0.56 (14.22) MAX 0.46 (11.68) MAX 0.46 (11.68) MAX TERMINAL 1 IDENTIFIER 0.35 (8.89) MAX 0.35 (8.89) MAX TERMINAL 1 IDENTIFIER 0.155 (3.94) 0.150 (3.81) 1 0.250 (6.35) 6 5 4 2 3 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.110 (2.79) 0.010 (0.25) 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.150 (3.81) 1 2 3 0.250 (6.35) 6 5 4 Unless otherwise specified, dimensions are nominal and in inches (millimeters). (c)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 T1-42 |
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