Common Mode Choke for Telecom Application Transformer ELECTRONICS INC. EPA2851 • Designed for 4-Wire Links T1/E1/CEPT • • High Frequency Choke for EMI Reduction • • 500 Vrms Isolation • Electrical Parameters @ 25° C OCL (µH Min.)(1) Leakage Inductance (µH Max.)(1) Interwinding Capacitance (pF Max.)(1) DCR (Ω Max.) 0.2 10 0.25 8.0 Notes: 1) Measured @ 100 KHz, 0.1 Vrms. Schematic 1 Package 8 2 7 3 6 4 5 1:1:1:1 ± 5% A Pin 1 I.D. PCA EPA2851 D.C. Impedance Common Mode Attenuation B Freq Ω Min.) Impedance (Ω Min.) CMRR (dB Min.) 1 MHz 5 MHz 10 MHz 20 MHz 30 MHz 40 MHz 100 MHz 200 MHz 100 500 750 1.1K 1.3K 1.3K 680 380 -2 -5 -8.5 -16 -17 -17 -15.5 -13 C Dimensions E F H Dim. A B C D E F G H G D PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 CSA2851 Rev. 1 Min. .480 .460 .380 .300 .125 .100 .298 .023 (Inches) Max. Nom. .500 .480 .400 Typ. .135 Typ. .302 .027 - (Milimeters) Min. Max. Nom. 12.19 11.68 9.65 7.62 3.18 2.54 7.57 .584 7/23/97 Product performance is limited to specified parameters. Data is subject to change without prior notice. 12.70 12.19 10.16 Typ. 3.43 Typ. 7.68 .690 - TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com