Audio Transformers / Signal Transformers

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Discrete LAN Magnetics

Bel Magnetic Solutions Discrete LAN Magnetics products deliver a broad range of magnetic-based solutions for high-speed networking and computer applications. This portfolio of single, dual, and quad SMT modules are compatible with IEEE 802.3 Ethernet standards for 10/100, 1G, 2.5G, 5G, and 10GBaseT transmission. Typical applications for Bel Magnetic Solutions Discrete LAN Magnetics are voice/video/data networking, high-performance computing, and storage traffic in enterprise and data centers.

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Part #

Audio Transformers / Signal Transformers Power Module

S558-5999-J1-F
Bel Magnetic Solutions
1: HK$18.74
3,154In Stock

Mfr. Part No.
S558-5999-J1-F

Mouser Part No
530-S558-5999-J1-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Power Module

Learn More

Datasheet

3,154In Stock

Cut Tape

HK$18.74

HK$17.02

HK$15.86

HK$15.21

Reel

HK$10.60

View

MouseReel Available

Min.: 1
Mult.: 1

: 900

LAN Transformers

Module

SMD/SMT

1 MHz to 10 MHz

350 uH

Single

10/100 Base-T

12.32 mm

7.24 mm

5.71 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers XFRMR LAN 5G 60W POE SMD

S558-5500-JV
Bel Magnetic Solutions
1: HK$43.98
1,488In Stock

Mfr. Part No.
S558-5500-JV

Mouser Part No
530-S558-5500-JV

Bel Magnetic Solutions

Audio Transformers / Signal Transformers XFRMR LAN 5G 60W POE SMD

Learn More

Datasheet

1,488In Stock

Cut Tape

HK$43.98

HK$33.13

HK$30.74

HK$29.76

Reel

HK$21.29

View

Min.: 1
Mult.: 1

: 380

PoE Transformers

SMD/SMT

1 MHz to 300 MHz

- 40 C

+ 85 C

Quad

PoE

17.53 mm

12.19 mm

5.71 mm

Reel, Cut Tape

Audio Transformers / Signal Transformers Transformer

S558-5999-U7-F
Bel Magnetic Solutions
1: HK$16.85
20,760In Stock
44,100Expected 4/9/2026

Mfr. Part No.
S558-5999-U7-F

Mouser Part No
530-S558-5999-U7-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

20,760In Stock

44,100Expected 4/9/2026

Cut Tape

HK$16.85

HK$15.29

HK$14.22

HK$13.81

Reel

HK$11.34

View

MouseReel Available

Min.: 1
Mult.: 1

: 900

LAN Transformers

Module

SMD/SMT

300 kHz to 100 MHz

350 uH

- 40 C

+ 85 C

Single

10/100 Base-T

12.32 mm

7.24 mm

5.72 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-AT-F
Bel Magnetic Solutions
1: HK$43.89
659In Stock
112Expected 12/8/2026

Mfr. Part No.
S558-5999-AT-F

Mouser Part No
530-S558-5999-AT-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

659In Stock

112Expected 12/8/2026

Cut Tape

HK$43.89

HK$38.63

HK$36.99

HK$35.84

View

Reel

HK$29.10

MouseReel Available

Min.: 1
Mult.: 1

: 380

LAN Transformers

Module

SMD/SMT

100 kHz to 125 MHz

350 uH

- 40 C

+ 85 C

Single

1000 Base-T

17.53 mm

12.19 mm

5.71 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-AZ-F
Bel Magnetic Solutions
1: HK$64.20
2,270In Stock

Mfr. Part No.
S558-5999-AZ-F

Mouser Part No
530-S558-5999-AZ-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

2,270In Stock

Cut Tape

HK$64.20

HK$56.06

HK$53.18

HK$50.39

Reel

HK$44.63

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,100

LAN Transformers

Module

SMD/SMT

1 MHz to 125 MHz

350 uH

0 C

+ 70 C

Single

1000 Base-T

22.35 mm

13.72 mm

1.73 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-P3-F
Bel Magnetic Solutions
1: HK$44.72
766In Stock

Mfr. Part No.
S558-5999-P3-F

Mouser Part No
530-S558-5999-P3-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

766In Stock

Cut Tape

HK$44.72

HK$40.44

HK$38.80

HK$37.65

Reel

HK$32.63

View

MouseReel Available

Min.: 1
Mult.: 1

: 380

LAN Transformers

Module

SMD/SMT

100 kHz to 125 MHz

350 uH

0 C

+ 70 C

Single

1000 Base-T

17.53 mm

12.19 mm

5.71 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-Q2-F
Bel Magnetic Solutions
1: HK$58.69
319In Stock
480Expected 16/10/2026

Mfr. Part No.
S558-5999-Q2-F

Mouser Part No
530-S558-5999-Q2-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

319In Stock

480Expected 16/10/2026

Cut Tape

HK$58.69

HK$46.77

HK$44.06

HK$40.85

Reel

HK$38.47

View

MouseReel Available

Min.: 1
Mult.: 1

: 240

LAN Transformers

Module

SMD/SMT

1 MHz to 125 MHz

350 uH

0 C

+ 70 C

Dual

1000 Base-T

27.81 mm

12.19 mm

7.24 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-T3-F
Bel Magnetic Solutions
1: HK$50.88
1,382In Stock

Mfr. Part No.
S558-5999-T3-F

Mouser Part No
530-S558-5999-T3-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

1,382In Stock

Cut Tape

HK$50.88

HK$39.05

HK$37.24

HK$36.09

Reel

HK$31.81

View

MouseReel Available

Min.: 1
Mult.: 1

: 320

LAN Transformers

Module

SMD/SMT

100 kHz to 125 MHz

350 uH

0 C

+ 70 C

Single

1000 Base-T

15.24 mm

13.26 mm

6.35 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-T7-F
Bel Magnetic Solutions
1: HK$16.85
4,382In Stock
3,600Expected 28/8/2026

Mfr. Part No.
S558-5999-T7-F

Mouser Part No
530-S558-5999-T7-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

4,382In Stock

3,600Expected 28/8/2026

Cut Tape

HK$16.85

HK$15.29

HK$14.22

HK$13.81

Reel

HK$12.00

View

MouseReel Available

Min.: 1
Mult.: 1

: 900

LAN Transformers

Module

SMD/SMT

1 MHz to 80 MHz

350 uH

- 40 C

+ 85 C

Single

10/100 Base-T

12.32 mm

7.24 mm

5.72 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-W2-F
Bel Magnetic Solutions
1: HK$18.74
1,077In Stock

Mfr. Part No.
S558-5999-W2-F

Mouser Part No
530-S558-5999-W2-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

1,077In Stock

Cut Tape

HK$18.74

HK$17.02

HK$15.86

HK$14.88

Reel

HK$12.58

View

MouseReel Available

Min.: 1
Mult.: 1

: 900

LAN Transformers

Module

SMD/SMT

100 kHz to 250 MHz

350 uH

- 40 C

+ 85 C

Single

10/100 Base-T

12.32 mm

7.24 mm

5.71 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-Z5-F
Bel Magnetic Solutions
1: HK$16.85
3,681In Stock
5,400Expected 25/9/2026

Mfr. Part No.
S558-5999-Z5-F

Mouser Part No
530-S558-5999-Z5-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

3,681In Stock

5,400Expected 25/9/2026

Cut Tape

HK$16.85

HK$15.29

HK$14.22

HK$13.81

Reel

HK$12.00

View

MouseReel Available

Min.: 1
Mult.: 1

: 900

LAN Transformers

Module

SMD/SMT

100 kHz to 100 MHz

350 uH

- 40 C

+ 85 C

Single

10/100 Base-T

12.32 mm

7.24 mm

5.71 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers 10G PoE 100W

S558-10GB-23
Bel Magnetic Solutions
1: HK$64.20
244In Stock
300Expected 4/9/2026

Mfr. Part No.
S558-10GB-23

Mouser Part No
530-S558-10GB-23

Bel Magnetic Solutions

Audio Transformers / Signal Transformers 10G PoE 100W

Learn More

Datasheet

244In Stock

300Expected 4/9/2026

Cut Tape

HK$64.20

HK$56.64

HK$53.76

HK$50.88

Reel

HK$44.72

View

Min.: 1
Mult.: 1

: 300

PoE Transformers

SMD/SMT

1 MHz to 600 MHz

- 40 C

+ 85 C

Quad

10G PoE

15.49 mm

15.24 mm

7.37 mm

Reel, Cut Tape

Audio Transformers / Signal Transformers 2.5G 4pPoE transformer

S558-5500-JB
Bel Magnetic Solutions
1: HK$32.47
2In Stock
3,420Expected 13/11/2026

Mfr. Part No.
S558-5500-JB

Mouser Part No
530-S558-5500-JB

Bel Magnetic Solutions

Audio Transformers / Signal Transformers 2.5G 4pPoE transformer

Learn More

Datasheet

2In Stock

3,420Expected 13/11/2026

Cut Tape

HK$32.47

HK$29.18

HK$27.78

HK$26.88

Reel

HK$23.43

View

Min.: 1
Mult.: 1

: 380

Reel, Cut Tape

Audio Transformers / Signal Transformers Transformer

S558-5999-T5-F
Bel Magnetic Solutions
1: HK$16.85
282In Stock
2,700Expected 16/10/2026

Mfr. Part No.
S558-5999-T5-F

Mouser Part No
530-S558-5999-T5-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

282In Stock

2,700Expected 16/10/2026

Cut Tape

HK$16.85

HK$15.29

HK$14.22

HK$13.48

Reel

HK$11.59

View

MouseReel Available

Min.: 1
Mult.: 1

: 900

LAN Transformers

Module

SMD/SMT

350 uH

- 40 C

+ 85 C

Single

10/100 Base-T

12.32 mm

7.24 mm

5.71 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers XFRMR LAN 2.5G 60W POE SMD

S558-5500-JD
Bel Magnetic Solutions
1: HK$32.47
1,520On Order

Mfr. Part No.
S558-5500-JD

Mouser Part No
530-S558-5500-JD

Bel Magnetic Solutions

Audio Transformers / Signal Transformers XFRMR LAN 2.5G 60W POE SMD

Learn More

Datasheet

1,520On Order

Cut Tape

HK$32.47

HK$29.02

HK$27.37

HK$26.47

Reel

HK$20.80

View

Min.: 1
Mult.: 1

: 380

PoE Transformers

SMD/SMT

1 MHz to 150 MHz

0 C

+ 70 C

Quad

PoE

17.53 mm

12.19 mm

5.71 mm

Reel, Cut Tape

Audio Transformers / Signal Transformers Transformer

S558-5999-AB-F
Bel Magnetic Solutions
1: HK$32.47
4,741On Order

Mfr. Part No.
S558-5999-AB-F

Mouser Part No
530-S558-5999-AB-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

4,741On Order

Cut Tape

HK$32.47

HK$29.35

HK$28.19

HK$27.29

Reel

HK$24.50

View

MouseReel Available

Min.: 1
Mult.: 1

: 320

LAN Transformers

Module

SMD/SMT

100 kHz to 125 MHz

350 uH

- 40 C

+ 85 C

Single

1000 Base-T

15.24 mm

13.26 mm

6.35 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-M8-F
Bel Magnetic Solutions
1: HK$33.54
720Expected 25/9/2026

Mfr. Part No.
S558-5999-M8-F

Mouser Part No
530-S558-5999-M8-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

720Expected 25/9/2026

Cut Tape

HK$33.54

HK$25.24

HK$23.43

HK$22.69

Reel

HK$19.40

View

MouseReel Available

Min.: 1
Mult.: 1

: 380

LAN Transformers

Module

SMD/SMT

100 kHz to 125 MHz

350 uH

0 C

+ 70 C

Single

1000 Base-T

17.53 mm

12.19 mm

5.71 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Transformer

S558-5999-Q9-F
Bel Magnetic Solutions
1: HK$56.72
1,920On Order

Mfr. Part No.
S558-5999-Q9-F

Mouser Part No
530-S558-5999-Q9-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Transformer

Learn More

Datasheet

1,920On Order

Cut Tape

HK$56.72

HK$45.21

HK$42.50

HK$39.46

Reel

HK$37.24

View

MouseReel Available

Min.: 1
Mult.: 1

: 320

LAN Transformers

Module

SMD/SMT

100 kHz to 500 MHz

350 uH

0 C

+ 70 C

Dual

1000 Base-T

27.94 mm

15.24 mm

4.47 mm

Reel, Cut Tape, MouseReel

Audio Transformers / Signal Transformers Power Module

S558-5999-AM-F
Bel Magnetic Solutions
2,200: HK$36.33
Non-Stocked Lead-Time 14 Weeks

Mfr. Part No.
S558-5999-AM-F

Mouser Part No
530-S558-5999-AM-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Power Module

Learn More

Datasheet

Non-Stocked Lead-Time 14 Weeks

Cut Tape

HK$36.33

Min.: 2,200
Mult.: 1,100

: 1,100

LAN Transformers

Module

SMD/SMT

1 MHz to 100 MHz

350 uH

0 C

+ 70 C

Single

1000 Base-T

22.35 mm

13.72 mm

1.73 mm

Reel

Audio Transformers / Signal Transformers Power Module

S558-5999-Q3-F
Bel Magnetic Solutions
1: HK$74.56
Non-Stocked Lead-Time 14 Weeks

Mfr. Part No.
S558-5999-Q3-F

Mouser Part No
530-S558-5999-Q3-F

Bel Magnetic Solutions

Audio Transformers / Signal Transformers Power Module

Learn More

Datasheet

Non-Stocked Lead-Time 14 Weeks

Cut Tape

HK$74.56

HK$59.43

HK$55.90

HK$51.79

Reel

HK$48.91

View

MouseReel Available

Min.: 1
Mult.: 1

: 240

LAN Transformers

Module

SMD/SMT

1 MHz to 125 MHz

350 uH

0 C

+ 70 C

Dual

1000 Base-T

27.81 mm

12.19 mm

7.24 mm

Reel, Cut Tape, MouseReel

Discrete LAN Magnetics

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