TRANSFORMERS
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 TRANSFORMERS
DUAL SURFACE MOUNT
.400
(10.2)
MAX
.600
(15.3)
MAX
.340(8.64)
MAX
.675(17.2)
MAX
YYWW
1
12 11 10 9 8 7
1 2 3 4 5 6
12 11 10 9 8 7
1 2 3 4 6
1
2
.004
12
7
.040/.050
(1.01/1.27)
.010/.020
(0.25/0.51)
.100(2.54)
TYP
.030(0.76)
TYP
.085(2.16)
6
.475
(12.1)
MAX
PART NUMBER
bel
12 10 9 8 7
1 2 3 4 5 6
12 10 9 8 7
1 2 3 4 5 6
5
4
1 2 3 5 6
12 11 10 8 7
3
Dual surface mount package contains both transmit
and receive transformers.
Models matched to leading transceiver chips.
Provide 1500 Vrms Isolation.
Bel introduces a new ISDN TI/CEPT/
ISDN-PRI Transformer in a surface
mount package
Pins
12-10,4-6
12-10,4-6
12-10,4-6
1-3,5-6
12-10,4-6
12-10,4-6
12-10,4-6
ELECTRICALS SPECIFICATIONS
@ 25
O
C Standard Temp. Range Models
1
2
5
3
4
5
2
(ohms max)
1.2 & 1.2
1.2 & 0.9
1.2 & 0.9
1.2 & 0.7
0.9 & 1.2
0.9 & 1.2
1.2 & 0.7
0.7 & 0.7
0.7 & 0.7
0.7 & 0.7
0.7 & 0.7
0.7 & 0.7
0.7 & 0.7
0.7 & 0.7
(ohms max)
(uH max)
Part Number
Turns Ratio
OCL 25
O
C
Cw/w
L
L
DRC PRI
DRC SEC
Primary
Sch
(pf max)
31 & 31
32 & 37
40 & 35
30 & 30
35 & 35
40 & 40
40 & 30
(mH min)
1.2 & 1.2
1.2 & 1.2
1.2 & 1.2
1.2 & 1.2
1.5 & 1.2
1.5 & 1.2
1.2 & 1.2
(pri:sec +/-5%)
S553-6500-10
S553-6500-11
S553-6500-12
S553-6500-13
S553-6500-14
S553-6500-15
S553-6500-16
1ct:2ct & 1ct:2ct
1ct:2ct & 1:1.36ct
1:2ct &1:1.14ct
1ct:2ct & 1:1
1:1.15ct & 1ct:2ct
1:1:1.26 & 1:2ct
1ct:2ct & 1:1.08ct
0.60 & 0.6
0.55 & 0.8
0.55 & 0.8
0.55 & 0.8
0.60 & 0.6
0.40 & 0.5
0.60 & 0.6
TM0001
T100
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
.400
(10.2)
MAX
.600
(15.3)
MAX
.340(8.64)
MAX
.675(17.2)
MAX
YYWW
1
12 11 10 9 8 7
1 2 3 4 5 6
12 11 10 9 8 7
12 10 9 8 7
1 2 3 4 5 6
12 10 9 8 7
1 2 3 4 6
1 2 3 4 5 6
1 3 4 6
12 11 10 9 7
1
2
6
5
4
.004
12
7
.100(2.54)
TYP
.030(0.76)
TYP
.085(2.16)
6
.475
(12.1)
MAX
PART NUMBER
bel
.040/.050
(1.01/1.27)
.010/.020
(0.25/0.51)
Primary
Pins
12-10,4-6
12-10,4-6
12-10,4-6
12-10,4-6
12-10,4-6
1-3,4-6
ELECTRICALS SPECIFICATIONS
@ 25
O
C * Extended Temp. Range Models
1
1
2
4
5
6
DRC SEC
(ohms max)
1.0 & 1.0
1.7 & 1.7
2.0 & 1.7
1.0 & 1.7
1.1 & 1.7
1.1 & 0.7
1.0 & 1.0
1.0 & 1.0
1.5 & 1.5
1.0 & 1.0
1.0 & 1.0
1.1 & 1.1
DRC PRI
(ohms max)
L
L
(uH max)
Part Number
Sch
0.8 & 0.8
0.8 & 0.8
1.0 & 0.8
0.8 & 0.8
0.8 & 0.8
1.3 & 1.3
Cw/w
(pf max)
50 & 50
50 & 50
60 & 50
60 & 50
50 & 60
50 & 40
OCL 25
O
C
(mH min)
1.2 & 1.2
1.2 & 1.2
1.6 & 1.6
1.5 & 1.2
1.5 & 1.2
1.6 & 1.6
1ct:1ct & 1ct:1ct
1ct:2ct & 1ct:2ct
1ct:2ct & 1:1.36ct
1:1.15ct & 1ct:2ct
1:1:1.266 & 1:2ct
2:2ct & 2:1
Turns Ratio
(pri:sec +/-5%)
S553-6500-03
S553-6500-05
S553-6500-06
S553-6500-07
S553-6500-08
S553-6500-09
*
Extented temp. range is -40 C to +85 C
At -40 dregee C, OCL is 600 uH min. for all low temp. models with the exception
of S553-6500-09 which is 800 uH min.. All other parameters are specified at
+25 degree C only.
Bel introduces a new ISDN TI/CEPT/
ISDN-PRI Transformer in a surface
mount package
Dual surface mount package contains both transmit
and receive transformers.
Models matched to leading transceiver chips.
Provide 1500 Vrms Isolation.
T1/CEPT/ISDN-PRI TRANSFORMERS
DUAL SURFACE MOUNT
TM0002
T101
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
S559-6400-00
MECHANICALS
SUGGESTED
PAD LAYOUT
bel
S559-6400-00
Date Code
0.400
(10.16)
Max
0.675(17.15)
Max
0.60(15.24)
Max
0.640
(16.3)
0.400
(10.2)
0.500
(12.7)
0.10(2.5) Typ
0.05(1.3) Typ
12
7
6
0.10(2.54)
0.03(0.76)
0.470
(11.94)
Max
1
0.340
(8.64)
Max
0.055
(1.40)
0.004
0
o
-5
o
0.015(0.38)Min
0.02(0.51) Max
Primary
Inductance
OCL
(mH) Min
Leakage
Inductance
L
L
(
H) Max
Pins (4-6) and
Pins (10-12)
Pins (4-6) and
Pins (10-12)
Turns Ratio +/- 5%
Part
Number
Dielectric
Strength
(VAC)
1.1
Pins
(1-3)
Pins
(4-6)
Pins
(7-9)
DCR (ohms)
Max
Pins
(10-12)
Pins (1,2,3) to Pins (10,11,12)
and Pins (4,5,6) to Pins (7,8,9)
Interwinding Capacitance
(pF) Max
Dielectric Strength is measured Pins (1,2,3) to Pins (10,11,12) and Pins (4,5,6) to Pins (7,8,9).
Primary Inductance, Leakage Inductance, and Interwinding Capacitance are measured at 100KHz, 0.02VAC.
S559-6400-00
1.5
0.8
60
1.0
1.0
1.0
1500
Part
Number
Pins (10-12):(1-3) Pins (4-6):(7-9)
1CT:1.15CT
S559-6400-00
1CT:1CT
ELECTRICALS
@ 25
O
C
All dimensions are in inches(mm).
Dimension Tolerance is +/-0.01(0.25)
unless otherwise specified.
* Dielectric Strength 1500 VAC.
* Temperature Range is
-40
o
C to 85
o
C.
Bel offers a dual, T1, surface mount
transformer packaged to provide both transmit and
receive transformers. This design is easily custom-
ized for other leading transceiver chips by adjusting
the turns ratio.
1
2
3
12
11
10
4
5
6
9
8
7
1.15 : 1
1 : 1
SCHEMATIC
TM0003
T102
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
S553-6500-26
0.015(0.38)Min
0.02(0.51) Max
MECHANICALS
SUGGESTED
PAD LAYOUT
0.640
(16.3)
0.400
(10.2)
0.500
(12.7)
0.10(2.5) Typ
0.05(1.3) Typ
Primary
Inductance
OCL
(mH) Min
Pins (1-3) and
Pins (4-6)
Pins (1-2) and
Pins (4-6)
Part
Number
1.0
Pins
(1-3)
Pins
(4-6)
Pins
(7-9)
DCR (ohms)
Max
Pins
(10-12)
Pins (1,2,3) to Pins (10,11,12)
and Pins (4,5,6) to Pins (7,8,9)
S553-6500-26
1.2
0.8
50
1.8
1.0
1.0
1500
Part
Number
Pins (10-12):(1-3) Pins (4-6):(7-9)
1CT:1.CT
S553-6500-26
1CT:2CT
All dimensions are in inches(mm).
Dimension Tolerance is +/-0.01(0.25)
unless otherwise specified.
0.055
(1.40)
0.004
ELECTRICALS
@ 25
o
C
0
o
-5
o
bel
Date Code
S553-6500-26
Turns Ratio +/- 2%
Dielectric
Strength
(VAC)
Dielectric Strength is measured Pins (1,2,3) to Pins (10,11,12) and Pins (4,5,6) to Pins (7,8,9).
Primary Inductance, Leakage Inductance, and Interwinding Capacitance are measured at 100KHz, 0.02VAC.
Bel offers a dual, T1, surface mount
transformer packaged to provide both transmit
and receive transformers. This design is
easily customized for other leading transceiver
chips by adjusting the turns ratio.
Secondary
Secondary
SCHEMATIC
* Dielectric Strength 1500 VAC.
* Extended Temperature Range is
-40
o
C to 85
o
C.
0.340
(8.64)
Max
12
11
10
9
8
7
1
Primary
2
3
4
5
Primary
6
1
6
0.400
(10.16)
Max
0.470
(11.94)
Max
0.03(0.76)
0.10(2.54)
12
7
0.675(17.15)
Max
Leakage
Inductance
L
L
(
H) Max
0.60
(15.24)
Max
Interwinding
Capacitance
(pF) Max
TM0004
T103
PDF 
ZIP