Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
10/100BASE-T LAN MAGNETICS
2001Bel Fuse Inc. Specifications subject to change without notice. 09.01
LM00404
L4-11
Quad Transformer Modules
ELECTRICAL SPECIFICATIONS AT 25 C
SCHEMATICS
Quad, four-port designs provide excellent EMI and
common mode noise suppression
Low profile, surface mount packaging rated to 225 C
peak IR reflow temperature
Meets all IEEE 802.3 standards including 350H with
8mA bias
Minimum interwinding breakdown voltage of 1500 Vrms
Operating temperature 0 to 70 C
S558-5999-J0
Quad Port Dual Stack RJ-45
2CT : 1CT
2CT : 1CT
2CT : 1CT
2CT : 1CT
1 : 1
1 : 1
1 : 1
1 : 1
1
2
3
4
TD1-
TD1+
TCT1
RD1-
RD1+ 5
6
7
8
TD2-
TD2+
TCT2
RD2- 9
RD2+ 10
11
12
13
14
15
TD3-
TD3+
TCT3
RD3-
RD3+
16
17
18
19
20
TD4-
TD4+
TCT4
RD4-
RD4+
40
39
38
37
RX1+
TCMT1
TX1+
TX1-
35
36
34
33
TX2-
TX2+
TCMT2
RX2-
32
RX2+
31
30
29
28
27
26
RX3+
RX3-
TCMT3
TX3+
TX3-
25
24
23
22
21
TX4-
TX4+
TCMT4
RX4-
RX4+
RX1-
S558-5999-E4
Quad Port Single Row RJ-45
2CT : 1
2CT : 1
2CT : 1
2CT : 1
1 : 1
1 : 1
1 : 1
1 : 1
1
2
3
4
5
TD1+
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
RD1+
TCT1
TD2+
TD1-
TCT2
TD2-
RD2+
RD2-
TD3+
TCT3
TD3-
RD3+
RD3-
TD4+
TCT4
TD4-
RD4+
RD4-
38
37
36
35
33
32
31
30
27
28
26
25
23
22
21
TX1-
TX2-
TX2+
RX2+
RX2-
TX3-
TX4+
RX3+
TX3+
RX3-
TX4-
RX4+
RX4-
40 TX1+
RX1+
RX1-
RD1+
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CORPORATE
Bel Fuse Inc.
206 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
10/100BASE-T LAN MAGNETICS
2001 Bel Fuse Inc. Specifications subject to change without notice. 09.01
LM00404
L4-12
Quad Transformer Modules
MECHANICAL
SCHEMATICS
S558-5999-77
S558-5999-E4
S558-5999-J0
0.480
[12.19]
0.070
[1.78]
ref
1.100
[27.94]
max
0.050 [1.27]
0.950
[24.13]
0.212
[5.38]
ref
0.225
[5.72]
max
0.035
[0.89]
0.005
[0.13]
min
0- 5
0.020 0.002
[0.51 0.05]
R 0.005
[0.13]
R 0.015
[0.39]
0.070
[1.78]
0.050 [1.27]
0.030 [0.77]
0.645
[16.38]
Suggested PCB Pad Layout
Dimensions are in inches [millimeters].
Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
0.600
[15.24]
0.004 [0.10]
S558-5999-77
TX1
1
2
3
1 : 1
4
5
RX1
TX2
6
7
8
9
10
RX2
11
12
13
14
15
TX3
RX3
16
17
18
19
20
TX4
RX4
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
1.23CT : 1CT
1 : 1
1.23CT : 1CT
1 : 1
1.23CT : 1CT
1 : 1
1.23CT : 1CT
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