HIGH FREQUENCY MAGNECTICS
Wideband Surface Mount Transformers
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Optimized for line interface applications
Minimum 1-dB bandwidth:
S553-6500-B3 (100Ω : 156Ω): 0.1 - 10 MHz
S553-6500-B4 (25Ω : 100Ω): 0.1 - 10 MHz
Minimum voltage-time (ET) product for Winding
(1-8) of each transformer: 15 V-µs
Minimum interwinding breakdown voltage
1500 VDC
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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
Solder: High Temperature, Lead-Free
Sn 95% / Ag 3.8% / Cu 1.2%
TM01106
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ELECTRICAL SPECIFICATIONS AT 25° C
Inductance
1
µH min
Part Number
Turns Ratio
±2%
(1-8)
Leakage
Inductance
2
µH max
DCR
Ω
max
Interwinding
Capacitance
3
pF max
(4-5)
(1-8)
(1-8)
(3-6)
S553-6500-B3
(1-8) : (4-5)
1 : 1.25
(1-8) : (3-6) : (4-5)
1:1:1
715
0.4
0.5
-
0.6
25
S553-6500-B4
715
0.3
0.5
0.5
0.5
30
1. Measured at 100 kHz.
2. Measured at 100 kHz with all other windings shorted.
3. Measured at 100 kHz. For S553-650 B4, 6 and 4 are connected together.
SCHEMATIC
S553-6500-B3
S553-6500-B4
1 : 1.25
1
4
1:1:1
1
3
6
8
5
4
8
5
©2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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BEL [ BEL FUSE INC. ]
