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
©2006 Bel Fuse Inc. Specifications subject to change without notice. 03.06
LM00406
L4-17
Single Port Transformer Modules
ELECTRICAL SPECIFICATIONS AT 25° C
• Meets all IEEE 802.3 standards including 350µH 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+
RXC
T
RX-
S558-5999-J2
1CT : 1CT
1CT : 1CT
1
2
3
6
7
8
16
15
14
11
10
9
TX+
TD+
RD+
T
DCT
TD-
R
DCT
RD-
TXC
T
TX-
RX+
RXC
T
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-
rebmuNtraP
oitaRsnruT noitresnI ssoL xamBd
ssoLnruteR nimBd
otnommoC laitnereffiD edoM noitcejeR nimBd
otnommoC nommoC edoM noitcejeR nimBd
klatssorC nimBd
XT XR otzHk001 zHM001 otzHk001 zHM03 otzHM03 zHM06 otzHM06 zHM08 zHM001otzHk001 zHM1 zHM03 zHM06 zHM001
1J-9995-855STC1:TC1TC1:TC10.1-61- gol02-61 )zHM03/f( 01-04-03-56-55-54-53-
2J-9995-855STC1:TC1TC1:TC10.1-61- gol02-61 )zHM03/f( 01-83-03-06-05-04-03-
9K-9995-855STC1:TC2TC1:TC11.1-61- gol02-61 )zHM03/f( 01-04-03-56-55-54-04-
3N-9995-855STC14.1:TC1TC1:TC10.2-61- gol02-61 )zHM03/f( 01-04-03-56-55-54-53-
7T-9995-855STC1:TC1TC1:TC10.1-81- gol02-81 )zHM03/f( 21-04-03-56-55-54-53-
7U-9995-855STC1:TC1TC1:TC10.1-81- gol02-81 )zHM03/f( 21-04-03-56-55-54-53-
CORPORATE
Bel Fuse Inc.
206 V an V orst 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
K owloon, Hong K ong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
EUROPE
Bel Fuse Eur ope 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
©2006 Bel Fuse Inc. Specifications subject to change without notice. 03.06
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
S558-5999-U7
1CT : 1.414CT
1CT : 1CT
1
2
3
6
7
8
16
15
14
11
10
9
TD- TX1
RX-
TXCT
TX+
RXCT
RX+
TDCT
TD+
RD-
RDCT
RD+
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-
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-
RXC
T
RX+
