2771K Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUENCY MAGNETICS T1/E1 Surface Mount Shielded Hardened Transformers

HIGH FREQUENCY MAGNETICS
T1/E1 Surface Mount Shielded Hardened Transformers
TM00141
• Operates at the rate of 1.544 Mb/s and the E1 rate of
2.048 Mb/s
• Interwinding Electrostatic Shield provides low
capacitance and high EMI suppression
• 2771K and S553-6500-84: Winding (4-1) is
hardened to handle a 6A surge for 1 second
• 2771M: All windings are hardened to handle a 6A
surge for 1 second
• Minimum Interwinding Breakdown Voltage of 1500
Vrms
• 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
ELECTRICAL SPECIFICATIONS AT 25° C
Part Number
Turns Ratio
± 2%
Pri : Sec
2771K
1 CT : 2
2771M
1 : 1.37 CT
S553-6500-84
1 CT : 1
1. measured at 10 kHz, 0.1 Vac
2. measured at 100 kHz, 0.1 Vac
3. with shield grounded
Primary
Inductance¹
mH min
2.75
1.10
2.75
SCHEMATICS
2771M
4
S
5
7
6
1
Primary
8
2
Secondary
Leakage
Inductance²
µH max
2.8
0.65
2.8
DCR
Ω
max
Pri
Sec³
0.70
2.50
0.45
0.65
0.70
1.25
Interwinding
Capacitance³
pF max
10
5
10
S553-6500-84
2771K
S
4
5
2
3
1
Primary
8
6
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 [phone] • Fax [phone] • www.belfuse.com
T1-91