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defining a degree of excellence  
T1/CEPT/ISDN-PRITRANSFORMER  
0553-0013-14  
TM0018  
* Primary Inductance is 1.5 mH  
Bel provides a new transformer  
to be used in multiple T1/CEPT/ISDN-Pri  
applications.  
minimum.  
* Isolation Voltage - 1500Vrms.  
0.10(2.
0.35(8.89)  
M
0.13(3.30)  
Min  
Max  
E
C
H
A
N
I
0.50(12.70)  
Max  
0.40(10.16)  
C
A
L
S
BOTTOM  
VIEW  
0.25(6.35)  
Max  
TOP  
VIEW  
0.02" pin  
diameter typical  
1:1.266CT  
6
5
3
1
Secondary  
Primary  
SCHEMATIC  
Dimensionsininches(mm)  
Dimensiontolerance+/-0.01(0.25)  
unless otherwise stated  
2
ELECTRICALS @ 25O C.  
Turns  
Ratio  
+/- 5%  
Leakage  
Inductance  
LL  
Primary  
Inductance  
OCL  
DCR  
(ohms) Max  
Coupling  
Capacitance  
(pF) Max  
Part  
Number  
Pins  
(2-6):(1-5)  
(µH)Max  
(mH)Min  
Pins (2-6)  
Pins (1-5)  
0.80  
0553-0013-14  
1:1.266CT  
18  
0.80  
1.50  
0.92  
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  
T118