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
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
LM00406
L4-17
Single Port Transformer Modules
ELECTRICAL SPECIFICATIONS AT 25 C
Meets all IEEE 802.3 standards including 350H with
8mA bias
Low profile, surface mount packaging rated to 225 C
peak IR reflow temperature
Small form factor for board layout efficiency
Operating temperature 0 to 70 C
Minimum interwinding breakdown voltage of 1500 Vrms
SCHEMATICS
S558-5999-J1
1CT : 1CT
1CT : 1CT
1
2
3
6
7
8
16
15
14
11
10
9
TX+
TD+
RD+
TDCT
TD-
RDCT
RD-
TXCT
TX-
RX+
RXCT
RX-
S558-5999-J2
1CT : 1CT
1CT : 1CT
1
2
3
6
7
8
16
15
14
11
10
9
TX+
TD+
RD+
TDCT
TD-
RDCT
RD-
TXCT
TX-
RX+
RXCT
RX-
S558-5999-K9
2CT : 1CT
1CT : 1CT
1
2
3
6
7
8
16
15
14
11
10
9
TX+
TD+
RD+
TDCT
TD-
RDCT
RD-
TXCT
TX-
RX+
RXCT
RX-
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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
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
LM00406
L4-18
Single Port Transformer Modules
MECHANICAL
S558-5999-J1
S558-5999-J2
S558-5999-K9
S558-5999-N3
S558-5999-T7
S558-5999-U7
0.500
[12.70]
max
0.375
[9.53]
max
0.285
[7.24]
max
0.018 0.002
[0.46 0.05]
0.225
[5.72]
max
0.050
[1.27]
0.015
[0.38]
0.350 0.010
[8.89 0.25]
0.008 - 0.012
[0.20 - 0.30]
0.035
[0.89]
4 nom
0.025
[0.64]
0.070
[1.78]
0.050
[1.27]
0.425
[10.80]
Suggested PCB Pad Layout
Dimensions are in inches [millimeters].
Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
0.004 [0.10]
SCHEMATICS
S558-5999-N3
S558-5999-T7
1CT : 1.414CT
1CT : 1CT
1
2
3
6
7
8
16
15
14
11
10
9
TX-
TD1
RD-
TDCT
TD+
RDCT
RD+
TXCT
TX+
RX-
RXCT
RX+
Chip Side
Line Side
1CT : 1CT
1CT : 1CT
1
2
3
6
7
8
16
15
14
11
10
9
TD+
TX+
RX+
TXCT
TX-
RXCT
RX-
TDCT
TD-
RD+
RDCT
RD-
Chip Side
Line Side
S558-5999-U7
1CT : 1CT
1CT : 1CT
1
2
3
6
7
8
16
15
14
11
10
9
TX-
TD1
RD-
TDCT
TD+
RDCT
RD+
TXCT
TX+
RX-
RXCT
RX+
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