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
SURFACE MOUNT T1 CARRIER
INTERFACE TRANSFORMERS
T1/CEPT Telecom Line Interface Applications
Package Style SMT
MECHANICALS
Dimensions are in inches(mm).
Dimension Tolerance is +/- 0.02(0.51)
unless otherwise specified.
0.215(5.46)
Max
0.015(0.38)
0.004(0.10)
0.350(8.89)
+/-
0.005(0.13)
0.012(0.31)
0.008(0.20)
4
o
Nom
0.025(0.64)
0.015(0.38)
0.350(8.89)
0.375(9.53)
0.285(7.24)
Max
bel
Date Code
Part Number
0.018(0.45)
+/- 0.002(0.05)
Top
View
0.485(12.32)
Max
0.05(1.27)Typ.
SCHEMATICS
Primary
1
8
11
10
9
Secondary
Primary
Secondary
6
3
A
16
14
Primary
1
2
8
11
10
9
Secondary
Primary
B
Secondary
6
3
16
14
The Bel Surface Mount "Topper
TM
"
package offers an industry standard
package size and pin-out at an
aggressive price.
ELECTRICALS
Part
Number
Turns Ratio
T1/T2
1:1.7/1:2CT
1:1/1:1.25/1:2CT
Leakage
Inductance
L
L
(
H) Max
@ 25
O
C
S553-0013-04
S553-0013-05
0.50/0.80
0.50/0.50/0.80
35
50
DCR
(ohms) Max
0.80/1.80
0.80/1.10/1.80
A
B
Schematic
Coupling
Capacitance
(pF) Max
Turns ratio of S553-0013-05 ia (1-2):(16-14)/(1-3):(16-14)/(5-8):(9-11)
Bel offers a new cost effective package on our
standard T1/CEPT Telecom Interface Line
Transformers. This sixteen lead, "Topper
TM
",
surface mount package, provides a superior,
cost effective, quality product.
* High Pot 2000 Vrms measured
for one minute.
* Primary Inductance (OCL) is
1.20 Milihenries minimum.
* Primary DCR is 0.80 ohms maximum.
TM0008
T108
* Coupling Capacitance
(C
ww
) is 35 PicoFarads
maximum.
* Custom designs
available.
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