HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Shielded Transformers • Operate at the T1 rate of 1.544 Mb/s and the E1 rate of 2.084 Mb/s • Interwinding Electrostatic Shield provides low capacitance and high EMI suppression There is an internal connection to Terminal 8; do not use • • TM00114 • Operating temperature range: -40° C to +85° C • 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 Minimum interwinding breakdown voltage of 2200 Vdc ELECTRICAL SPECIFICATIONS AT 25° C Turns Ratio ± 2% Part Number DCR Ω max Primary Inductance1 mH Min Pri : Sec Leakage Inductance2 µH max Pri Sec Inductance Unbalance5 of CT windings Interwinding Capacitance4 pF max Winding % max 2741S 1 CT : 2 CT 3.15 2.3 5.8 6.8 7.5 Pri & Sec 0.2 2741T 1 CT : 1.3753 0.923 1.13 1.7 1.63 83 Pri 0.1 1. measured at 10 kHz, 0.1 Vac 2. measured at 100 kHz, 0.1 Vac 3. connect 2 to 6 4. connect 1 to ground 5. measured at 20 kHz SCHEMATICS 2741S 5 CT 6 S 2741T S 3 CT 4 3 4 6 5 CT 2 7 2 1 PRIMARY SECONDARY 7 1 PRIMARY 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 T1-57 HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Shielded Transformers TM00114 MECHANICAL 2741S 2741T 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 T1-58