Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
TM00125
T1-55
ELECTRICAL SPECIFICATIONS AT 25 C
SCHEMATIC
Operate as line-interface pulse transformers in DS1
and CEPT applications
Interwinding electrostatic shield for minimum
capacitance and maximum EMI suppression
Operating temperature range: -40 C to +85
C
HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Shielded Transformers
2745H2
2745AK2
Meets IEC 695, 2-2 flammability requirements
PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
3
1
2
6
5 CT
4
1 : N
r
e
b
m
u
N
t
r
a
P
l
a
n
i
m
o
N
o
i
t
a
R
s
n
r
u
T
%
2
e
c
n
a
t
c
u
d
n
I
1
n
i
M
H
m
R
C
D
x
a
m
e
g
a
k
a
e
L
e
c
n
a
t
c
u
d
n
I
2
x
a
m
H
l
a
c
i
p
y
T
e
v
i
t
c
e
f
f
E
d
e
t
u
b
i
r
t
s
i
D
e
c
n
a
t
i
c
a
p
a
C
F
p
g
n
i
d
n
i
w
r
e
t
n
I
e
c
n
a
t
i
c
a
p
a
C
x
a
m
F
p
m
u
m
i
n
i
M
g
n
i
d
n
i
w
r
e
t
n
I
n
w
o
d
k
a
e
r
B
e
g
a
t
l
o
V
s
m
r
V
)
6
-
4
(
:
)
1
-
3
(
)
1
-
3
(
)
1
-
3
(
)
6
-
4
(
)
1
-
3
(
)
1
-
3
(
)
6
-
4
(
o
t
)
1
-
3
(
3
2
H
5
4
7
2
T
C
6
3
.
1
:
1
4
2
.
1
8
5
.
1
0
5
.
0
3
.
3
0
5
0
1
0
5
8
2
K
A
5
4
7
2
T
C
4
1
.
1
:
1
5
2
.
1
7
8
.
0
8
7
.
0
0
.
2
-
5
0
0
0
1
c
a
V
1
.
0
,
z
H
k
0
1
t
a
d
e
r
u
s
a
e
m
.
1
c
a
V
1
.
0
,
z
H
k
0
0
1
t
a
d
e
r
u
s
a
e
m
.
2
d
e
d
n
u
o
r
g
2
h
t
i
w
.
3
CORPORATE
Bel Fuse Inc.
198 Van Vorst Street
Jersey City, NJ 07302
Tel
201-432-0463
Fax
201-432-9542
www.belfuse.com
FAR EAST
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel
852-2328-5515
Fax 852-2352-3706
www.belfuse.com
EUROPE
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel
44-1772-556601
Fax 44-1772-888366
www.belfuse.com
2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
TM00125
T1-56
MECHANICAL
2745H2
2745AK2
HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Shielded Transformers
0.56 (14.22)
MAX
0.46 (11.68)
MAX
TERMINAL 1
IDENTIFIER
0.023 (0.584) SQ TYP
(PHOSPHOR BRONZE,
SOLDER COATED)
0.35 (8.89)
MAX
0.110 (2.79)
0.010 (0.25)
0.150
(3.81)
0.250
(6.35)
1
2
3
6
5
4
Unless otherwise specified, dimensions are nominal and in inches (millimeters).
PDF 
ZIP