2741E2

HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Transformer • • • Operates at the DS1 rate of 1.544 Mbits/s Provides high step-up ratio Provides monitoring via winding (5-1) • • • 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 TM01103 • ELECTRICAL SPECIFICATIONS AT 25° C Turns Ratio ±2% Part Number (6-8) : (5-1) : (4-2) 2741E2 1 : 2.42 1 : 2.42 Primary Inductance mH min1 (4-2) 9.9 (6-8) 0.63 DCR Ω max (4-2) 1.96 (5-1) 0.51 Leakage Inductance µH max2 (4-2) 5.5 Interwinding Capacitance pF max (6-8) & (4-2) 65 Minimum Interwinding Breakdown Voltage Vrms 850 1. Measured at 10 kHz., 0.1 Vac 2. Measured at 100 kHz SCHEMATIC 2741E2 6 CT 7 8 4 3 CT 2 5 1 1CT : 3.55CT : 1 ©2001 Bel Fuse Inc. Specifications subject to change without notice. 02.01 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 1 HIGH FREQUENCY MAGNETICS TM01103 T1/E1 Through Hole Transformer MECHANICAL 2741E2 0.56 (14.22) MAX 0.46 (11.68) MAX TERMINAL 1 IDENTIFIER 0.35 (8.89) MAX 0.110 (2.79) ±0.010 (0.25) 0.100 (2.54) 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 1234 0.250 (6.35) 876 5 Unless otherwise specified, dimensions are nominal and in inches (millimeters). ©2001 Bel Fuse Inc. Specifications subject to change without notice. 02.01 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 F23, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com page 2