BEL 2741S

HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Shielded Transformers
•
Operate at the T1 rate of 1.544 Mb/s and the E1
rate of 2.084 Mb/s
•
Interwinding Electrostatic Shield provides low
capacitance and high EMI suppression
There is an internal connection to Terminal 8; do
not use
•
•
TM00114
•
Operating temperature range: -40° C 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
Minimum interwinding breakdown voltage of
2200 Vdc
ELECTRICAL SPECIFICATIONS AT 25° C
Turns Ratio
± 2%
Part Number
DCR
Ω
max
Primary
Inductance1
mH Min
Pri : Sec
Leakage
Inductance2
µH max
Pri
Sec
Inductance
Unbalance5 of CT
windings
Interwinding
Capacitance4
pF max
Winding
% max
2741S
1 CT : 2 CT
3.15
2.3
5.8
6.8
7.5
Pri & Sec
0.2
2741T
1 CT : 1.3753
0.923
1.13
1.7
1.63
83
Pri
0.1
1. measured at 10 kHz, 0.1 Vac
2. measured at 100 kHz, 0.1 Vac
3. connect 2 to 6
4. connect 1 to ground
5. measured at 20 kHz
SCHEMATICS
2741S
5
CT 6
S
2741T
S
3 CT
4
3
4
6
5
CT
2
7
2
1
PRIMARY SECONDARY
7
1
PRIMARY
SECONDARY
©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T1-57
HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Shielded Transformers
TM00114
MECHANICAL
2741S
2741T
0.56 (14.22)
MAX
0.46 (11.68)
MAX
TERMINAL 1 IDENTIFIER
0.35 (8.89)
MAX
0.155
(3.94)
0.023 (0.584) SQ TYP
(PHOSPHOR BRONZE,
SOLDER COATED)
0.100
(2.54)
1 2 3 4
0.250
(6.35)
8
7 6
5
Unless otherwise specified, dimensions are nominal and in inches (millimeters).
©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
198 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
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
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
T1-58