TM02129 BEL
Document overview
- PDF pages: 2
Technical content
Page 1

- Optimized for line transceivers operating at E3, DS3 or STS-1 rates: 34.368 Mb/s, 44.736 Mb/s, 51.84 Mb/s
- Transmit transformer and receive transformer in one surface mount package
- Meets ITU-T G.703 return loss from -40° to +85° C from 860 kHz to 51.55 MHz
- UL 1950 approved: file number E150991
ELECTRICAL SPECIFICATIONS at 25° C

- Operating temperature range -40° to +85°C
- 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
- Interwinding breakdown voltage: 1500 Vrms min
| Leakage imaryInductance Capacitance Inductance at100kHz Cw/w at1MHz | ReturnLossat1.72MHz 75 ΩΩΩΩΩApplication1 | |||
| C -40°C µHmax pFmax in µHmin | 25°C dBtyp | -40to+85°C dBmin | ||
| CoilB CoilA CoilB CoilA CoilB CoilA&B | CoilA | CoilB | CoilA | CoilB |
| 80 40 40 0.09 0.09 10 | 25 | 25 | 18 | 18 |
| 80 40 40 0.09 0.10 10 | 25 | 25 | 18 | 18 |
| 80 40 40 0.09 0.09 10 | 25 | 25 | 18 | 18 |
| 80 40 40 0.09 0.09 10 | 25 | 25 | 18 | 18 |
- Terminated in 75 Ω for 1 : 1 ratios and 300 Ω for 1 : 2 ratios
SCHEMATICS
S554-6500-15
S554-6500-16
Primary
Secondary
Secondary
Primary
1 : 1
1 : 1


Coil A
Coil A
Coil B
Coil B
©2002 Bel Fuse Inc. Specifications subject to change without notice. 02.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 1
Page 2

SCHEMATICS
S554-6500-18
S554-6500-17
Secondary
Primary
2CT : 1
Primary
Secondary 1 : 1


Coil A
Coil A
Coil B
Coil B
MECHANICAL
0.485 [12.32]

S554-6500-15 S554-6500-16 S554-6500-17 S554-6500-18
min
Dimensions are in inches [millimeters].
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.
Tape and Reel Packaging
24 mm wide by 12 mm pitch; 13 inch OD, 4 inch ID 750 modules per reel, maximum Meets ANSI/EIA 481-2 Carrier Tape Standards - JEDEC SO Package
©2002 Bel Fuse Inc. Specifications subject to change without notice. 02.02

CORPORATE
Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
page 2
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