2741S

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 Minimum interwinding breakdown voltage of 2200 Vdc • • • • 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 TM00114 • • • ELECTRICAL SPECIFICATIONS AT 25° C Turns Ratio ± 2% Part Number Pri : Sec DCR Ω max Pri Sec Inductance Unbalance5 of CT windings Winding % max Primary Inductance1 mH Min Leakage Inductance2 µH max Interwinding Capacitance4 pF max 2741S 2741T 1 CT : 2 CT 1 CT : 1.3753 3.15 0.923 2.3 1.13 5.8 1.7 6.8 1.63 7.5 83 Pri & Sec Pri 0.2 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 2741T 5 S S 4 3 6 CT 2 4 CT 6 3 CT 5 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 TM00114 T1/E1 Through Hole Shielded Transformers 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) 0.100 (2.54) 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 1234 0.250 (6.35) 8 76 5 Unless otherwise specified, dimensions are nominal and in inches (millimeters). ©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 T1-58