defining a degree of excellence
Corporate Office
Bel Fuse Inc.
198 Van Vorst Street, Jersey City, NJ 07302-4496
Tel: 201-432-0463
Fax: 201-432-9542
E-Mail: BelFuse@belfuse.com
Internet: http://www.belfuse.com
Far East Office
Bel Fuse Ltd.
8F/8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel: 852-2328-5515
Fax: 852-2352-3706
European Office
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Preston PR1 8UD
Lancashire, U.K.
Tel: 44-1772-556601
Fax: 44-1772-888366
T1/CEPT/ISDN-PRI TRANSFORMER
0553-0013-14
5
3
1
2
Secondary
Primary
Dimension tolerance +/- 0.01(0.25)
unless otherwise stated
Dimensions in inches(mm)
SCHEMATIC
6
1:1.266CT
TOP
VIEW
0.11MIN
2.77 MIN
0.50(12.70)
Max
0.35(8.89)
Max
0.13(3.30)
Min
0.25(6.35)
Max
0.40(10.16)
0.10(2.54)
M
E
C
H
A
N
I
C
A
L
S
BOTTOM
VIEW
0.02" pin
diameter typical
0553-0013-14
Pins
(2-6):(1-5)
Turns
Ratio
+/- 5%
0.92
0.80
0.80
Leakage
Inductance
L
L
(
H) Max
DCR
(ohms) Max
Coupling
Capacitance
(pF) Max
Part
Number
Primary
Inductance
OCL
(mH) Min
1.50
1:1.266CT
18
Pins (2-6)
Pins (1-5)
ELECTRICALS
@ 25
O
C.
Bel provides a new transformer
to be used in multiple T1/CEPT/ISDN-Pri
applications.
* Primary Inductance is 1.5 mH
minimum.
* Isolation Voltage - 1500Vrms.
bel
Part Number
TM0018
T118
PDF 
ZIP