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| HIGH FREQUENCY MAGNETICS Specialty Surface Mount Shielded Transformer TM00108 * Operates as high frequency pulse transformer in telecom switching systems at various signaling rates Interwinding Electrostatic Shield provides low capacitance and high EMI suppression Electrical equivalents: 2664A, 2741L2, 2779D * * 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 * * * * ELECTRICAL SPECIFICATIONS AT 25 C Nominal Turns Ratio 2% Pri : Sec (5-2) : (4-1) 2779D 1:2 Secondary Inductance1 mH min (4-1) 1.58 (4-1) 3.3 DCR Part Number max (5-2) 2.05 Secondary Leakage Inductance2 H (4-1) 8.5 max 6.5 min Interwinding & Winding to Shield Capacitance3 pF max (4-1) : 64 12 (4-1) : (5-2)5 3 Minimum Interwinding Breakdown Voltage Vrms 1500 1. measured at 100 kHz, 0.05 Vac 2. measured at 1 MHz, 0.05 Vac 3. measured at 1 kHz, 1 Vac 4. with (5-2) grounded 5. with 6 grounded SCHEMATIC 2779D 5 4 2 6 1:2 1 (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 T1-17 HIGH FREQUENCY MAGNETICS TM00108 Specialty Surface Mount Shielded Transformer MECHANICAL 2779D 8 7 6 5 8 TERMINAL 1 IDENTIFIER 1 0.350 (8.89) MAX 0.004 7 6 5 0.256 (6.50) 2 3 4 0.160 (4.06) 0.050 (1.27) 0.100 (2.54) 0.100 1 2 3 4 1 2 3 4 8 EDGES 0.490 (12.45) MAX 0.430 (10.92) MAX 0.500 (12.7) MAX 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 T1-18 |
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