FILTRAN TEW4897

ISDN
TEW4897
U-BUS Input/Output Transformer
TEW4897 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:
TEW4897 meets the electrical requirements for the SIEMENS
PEB20902/IEC (4B3T) device.
•
Low profile construction.
•
Up to 50 mA line current.
•
High insulation between line
and equipment side.
Exceeds the requirements of:
EN60950 and EN41003.
MECHANICAL
1
6
2
DEVICE
LINE
7
3
4
DOT AT
PIN #1
DIMENSIONS, Inches (mm)
P/N
Issue; D
97/08/25
TEW4897.chp
TEW4897
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)
ELECTRICAL
Line Impedance
Inductance
Leakage Inductance
(6-7)
(6-7)
Distributed Capacitance
Winding Resistance
Turns Ratio
Longitudinal Balance
DC Capability (Line Side)
Dielectric Strength
Filtran Limited
(1-4)
(1-4)
(6-7)
(6-7) : (1-4)
1 - 4 KHz
4 - 160 KHz
150 Ω
> 3.7 mH
< 12.5 µH
< 110 pF
< 2.5 Ω
< 1.74 Ω
1 : 1.32
> 60 dB
> 55 dB
50 mA
4000 V rms
229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3
Tel : (613) 226-1626 Fax : (613) 226-7124
4-12