2718BK2

ADSL MAGNETICS Through Hole Transformers TM9957 • 2718AF2 and 2718AH2 operate over the frequency range from 1kHz to 1.1MHz 2718BK2 operates over the frequency range from 500Hz to 1.1MHz • • Designed for broadband applications Minimum interwinding breakdown voltage of 1500 Vrms Qualified per Bellcore TR-TSY-000357-1 • • ELECTRICAL SPECIFICATIONS at 25° C Turns Ratio ± 3% Part Number Pri : Sec DCR Ω max Pri Sec Frequency Response dB 1kHz 1MHz Primary Inductance mH min Insertion Loss dB typ Interwinding Capacitance pF max 2718AF2 1.0 : 1.0 25.5 2.80 2.30 0.20 0.50 0.50 7.0* 2718AH2 1.0 : 1.0 25.5 2.80 2.30 0.20 0.50 0.50 10.0 2718BK2 1.0 : 1.0 11.0 1.50 1.50 N/A N/A N/A 30 * Terminal 8 grounded SCHEMATICS 2718AF2 2718AH2 2718BK2 1 S 4 1 4 1 10 10 2 7 5 10 2 7 5 3 2 8 9 9 8 Primary 6 Secondary 9 Primary 6 Secondary 4 Primary 7 Secondary ‘S’ denotes an electrostatic shield. ©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com T514 ADSL MAGNETICS TM9957 Through Hole Transformers MECHANICAL 2718AF2 2718AH2 2718BK2 0.52 [13.21] max 0.110 ± 0.010 [2.79 ± 0.25] 0.035 x 0.016 [0.89 x 0.41] 0.023 [0.584] sq typ (Phosphor Bronze, Solder-Coated) 0.59 [14.99] max 0.175 [4.44] 5 0.61 [15.49] max 0.100 [2.54] Centers 4 3 2 1 6 7 8 9 10 0.508 [12.90] Terminal 1 Identifier 0.450 [11.43] Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. ©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99 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 T515