2771M

HIGH FREQUENCY MAGNETICS T1/E1 Surface Mount Shielded Hardened Transformers • Operates at the rate of 1.544 Mb/s and the E1 rate of 2.048 Mb/s Interwinding Electrostatic Shield provides low capacitance and high EMI suppression 2771K and S553-6500-84: Winding (4-1) is hardened to handle a 6A surge for 1 second 2771M: All windings are hardened to handle a 6A surge for 1 second Minimum Interwinding Breakdown Voltage of 1500 Vrms • • • • 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 TM00141 • • • • ELECTRICAL SPECIFICATIONS AT 25° C Turns Ratio ± 2% Pri : Sec 2771K 2771M S553-6500-84 1 CT : 2 1 : 1.37 CT 1 CT : 1 DCR Primary Inductance1 mH min 2.75 1.10 2.75 Leakage Inductance2 µH max Pri 2.8 0.65 2.8 0.70 0.45 0.70 Ω max Sec3 2.50 0.65 1.25 Part Number Interwinding Capacitance3 pF max 10 5 10 1. measured at 10 kHz, 0.1 Vac 2. measured at 100 kHz, 0.1 Vac 3. with shield grounded SCHEMATICS 2771M S553-6500-84 2771K 4 S 5 S 4 5 2 3 1 Primary 6 8 Secondary 7 6 1 Primary 2 Secondary 8 ©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 T1-91 HIGH FREQUENCY MAGNETICS TM00141 T1/E1 Surface Mount Shielded Hardened Transformers MECHANICAL S553-6500-84 2771K 2771M 0.160 (11.68) 0.590 (14.99) MAX 87 65 0.120 (3.05) 0.495 0.430 (12.57)(10.92) MAX MAX 1234 TERMINAL 1 IDENTIFIER 0.395 (10.03) MAX 0.004 8 EDGES 0.23 (0.58) X 0.100 (2.54) FOOT (PHOSPHOR BRONZE, SOLDER COATED) 0.100 (2.54) TYP RECOMMENDED PCB PATTERN COMPONENT CENTER 0.255 (6.48) 0.120 (3.05) TYP 0.045 (1.14) TYP 0.008 (0.203) 2 PLACES 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 T1-92