ISDN TEW5039 U-BUS/DNIC Input/Output Transformer TEW5039 is designed to interface with the subscribers premises (NT) and the 2- wire line side of the Central Office Equipment (LT) in the ISDN Network. Applications: • Up to 50 mA line current. • TEW5039 meets the requirements of BS6301 for reinforced insulation, clearance and creepage distances between the line and the device side. • TEW5039-1 meets the requirements for pollution class 2. TEW5039 meets the electrical requirements for the Mitel MT8972 & MT8971B/72B devices. Certified to EN60950 and EN41003. MECHANICAL 1 6 2 LINE DEVICE 7 3 4 DOT AT PIN #1 DIMENSIONS, Inches (mm) P/N Issue; B 94/12/14 TEW5039.chp TEW5039 ELECTRICAL Line Impedance Inductance Leakage Inductance Winding Resistance (6-7) (6-7) (1-2) & (3-4) (6-7) Turns Ratio (6-7) : (1-2) : (3-4) DC Capability (Line Side) (1-4) Dielectric Strength Filtran Limited L W H A B C S 0.87 0.83 0.63 0.60 0.20 0.12 0.025 (22.0) (21.0) (16.0)(15.3) (5.1) (3.0) (0.64) TEW5039 TEW5039-1 135 Ω > 30mH < 95 µH 1.5 Ω ea 5.5 Ω 4:1:1 50 mA 4000 V rms 135 Ω > 30 mH < 95 µH 3.4 Ω ea 6.7 Ω 4:1:1 50 mA 4000V rms 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3 Tel : (613) 226-1626 Fax : (613) 226-7124 4-15