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
defining a degree of excellence
T1/CEPT/ISDN-PRI TRANSFORMER
S553-3855-02
SCHEMATIC
Bel introduces a new "pick and place" compatible,
small footprint, surface mount impedance
matching transformer for ISDN-PRI/T1/CEPT
applications.
bel
Date Code
S553-3855-02
0.285(7.24)
Max
1
0.018(0.46) +/- 0.002"
Top View
4
O
Nom
0.012(0.30)Max
0.008(0.20)Min
0.225(5.72)
Max
0.015(0.38)MAX
0.004(0.10)MIN
0.35 (8.89)
0.50(12.70) Max
0.025(0.64)Max
0.015(0.38)Min
0.375(9.53)Max
0.350(8.89)Min
ELECTRICALS
@ 25
o
C
* Leakage Inductance is measured with Pins (1-3) shorted.
** Leakage Inductance is measured with Pins (11-9) shorted.
0.70
1.20
1CT:2CT
Primary
Inductance
OCL (mH)
Min
Turns Ratio
Part
Number
Leakage
Inductance
L
L
(mH) Max
Pins
(16-14)*
Pins
(6-8)**
0.6
0.8
Interwinding
Capacitance
C
ww
(pF) Max
30
DC
Resistance
DCR Pri
(ohm) Max
0.70
Pins
(1-3)
Pins
(11-9)
1.00
DC Resistance
DCR Sec
(ohm) Max
Hipot
(Vrms)
Min
1500
9
10
11
12
13
16
15
14
1
2
3
4
5
6
7
8
Dimensions in inches (mm)
Dimension tolerance +/- 0.01(0.25)
unless otherwise stated
Primary
Primary
Secondary
Secondary
MECHANICALS
* Pick and Place Compatible.
* Small form factor to maximize
board space.
Pins
(6-8):(11-9)
S553-3855-02
Pins
(16-14):(1-3)
1:1.15CT
TM0009
T109
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