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defining a degree of excellence  
T1CARRIERINTERFACETRANSFORMERS  
T1/CEPTTelecomLineInterfaceApplications  
TM0006  
Bel provides transformer magnetics in several  
package and schematic variations for T1/CEPT  
Telecom Line Interface Applications. Bel's high  
quality semi-automated processes provide  
superior single small form, and standard dual  
transformers.  
* 2000 Vrms Isolation.  
* Primary Inductance is 1.20mH  
minimum.  
* Primary DCR is 0.80 ohms  
maximum.  
* Custom designs available  
upon request.  
ELECTRICALS @ 25o C  
Leakage  
Coupling  
Sec  
DCR  
(ohms)  
Max  
#Pins  
on  
Package  
and Style  
Turns  
Ratio  
(+/- 5%)  
Inductance  
LL  
Capacitance  
Cww  
Part  
Number  
Schem.  
(uH)Max  
(pF) Max  
A553-0013-00  
A553-0013-01  
A553-0013-03  
A553-0013-05 Pins(1-2):(14:12)1:1  
(1-3):(14:12)1.25:1  
1:1.385CT/1:1:1  
1CT:2CT/1:1  
1:1.385CT/1:1CT  
A
B
C
C
0.80/0.50  
0.80/0.50  
0.80/0.50  
16Topper  
14Topper  
14Topper  
14Topper  
35  
35  
35  
50  
0.80  
1.8/0.80  
0.80/0.80  
0.80/0.80/1.8  
0.50/0.50/0.80  
(5-7):(10:8)1:2CT  
A553-0013-06  
A553-0013-07  
A553-0013-08  
0553-0013-IC  
0553-0013-AC  
0553-0013-BC  
0553-0013-HC  
0553-0013-1J  
0553-0013-2J  
0553-0013-4J  
0553-0013-RC  
0553-0013-SC  
0553-1167-00  
1:2CT/1:2CT  
1:1.15CT/1:2CT  
1:1:1.266/1:2CT  
1:1:1  
C
C
C
E
F
G
K
C
D
B
G
E
C
0.80/0.80  
0.50/0.80  
0.80/0.80  
0.50  
14Topper  
14Topper  
14Topper  
6 "T" Topper  
6 "T" Topper  
6 "T" Topper  
6 "T" Topper  
14 DIL  
14 DIL  
14 DIL  
6 "T" Topper  
6 "T" Topper  
14 DIL  
35  
35  
35  
35  
35  
35  
35  
35  
35  
35  
35  
35  
35/40  
1.8/1.8  
0.80/1.8  
0.80/1.8  
0.80  
0.80  
0.80  
1:1  
1CT:1  
1CT:2CT  
0.50  
0.50  
0.80  
1.8  
1:2CT/1:2CT  
1:2CT/1:1.36  
1CT:2CT/1:1  
1:1.15CT  
1:1:1.266  
1:1:1.266/1:2CT  
0.80/0.80  
0.80/0.80  
0.80/0.50  
0.50  
0.80  
0.50/0.60  
1.8/1.8  
1.8/0.80  
1.8/0.8  
0.80  
0.80  
0.80/1.8  
Schematic and Mechanical information for the above components  
are located on the facing page.  
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel: 201-432-0463 • Fax: 201-432-9542 • E-Mail: BelFuse@belfuse.com  
Website: http://www.belfuse.com  
T105  
defining a degree of excellence  
T1 CARRIER INTERFACE  
TRANSFORMERS  
TM0006  
SCHEMATICS  
B
Secondary  
Secondary  
Primary  
C
A
Primary  
Secondary  
12  
3
9
12  
3
9
8
11 10  
9
8
14  
1
13  
11 10  
8
13  
14  
14  
1
11 10  
12  
16  
15  
1
2
3
4
5
7
5
7
6
2
4
6
4
2
5
6
7
Primary  
Secondary  
Primary  
Primary  
Secondary  
Primary  
13  
Secondary  
8 D  
E
F
G
12  
9
14  
11 10  
5
6
5
3
1
6
5
3
6
4
2
3
1
4
2
4
2
1
1
2
3
4
5
6
7
Secondary  
Primary  
K
MECHANICALS  
6
5
Package Style DIL  
Note: 0553-1167-00  
is missing pins  
4 and 11, and is 0.80"  
long and 0.25" high  
from seating plane.  
Package Style (14/16 Pins)  
3
1
4
2
Date Code  
0.29(7.37)  
Max  
bel  
0.325(8.26)  
Part Number  
0.28(7.11)  
0.10(2.54)  
0.80(20.30)  
Max  
0.20(5.08)  
1.00(25.40)  
Max  
Max  
0.23(5.84)  
Max  
0.010(0.25)  
0.34(8.64)  
Date Code  
0.385(9.78)  
Max  
bel  
0.12(3.05)  
Min  
Part Number  
Cross Sectional View  
0.018(0.46)  
Ref  
0.045(1.14)Ref  
0.20(5.08)  
MAX  
Note: For 14 Pin package, external package dimensions and pin  
distances are identical. There are only seven pins per side.  
0.20(5.08)  
Min  
Package Style “T”  
# 24 AWG  
Solder Plated  
0.10(2.54)  
0.35(8.89)  
Max  
0.50(12.70)  
Min  
0.30(7.62)  
0.50(12.70)  
Max  
0.40(10.16)  
0.10(2.54)  
Dimensions are in inches(mm).  
Dimension Tolerance is +/- 0.02(0.51)  
unless otherwise specified.  
0.25(6.35)  
Max  
Note: For 0553-0013-BC the  
pin length is 0.120" +0.2/-0"  
0.20(5.08)  
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  
T106