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SCH74
SMD POWER INDUCTORS
XXX
MARKING
● Features
1. Open frame construction
2 Excellent Power Density
3 Engineered to Provide High Efficiency
ELECTRICAL CHARACTERISTICS
Part Number
Inductance
(uH)
(1)
Test
Frequency
DC Resistance
( Ω MAX)
(2)
(4)
Saturation (3) Temperature
Current Current
(A) (A)
1000
BCH74 I
SCH74 Inductance decr decrease by by current
SCH74-100
10
1KHZ
56m
2.75
3.20
471
SCH74-120
SCH74-150
SCH74-180
SCH74-220
SCH74-270
12
15
18
22
27
1KHZ
1KHZ
1KHZ
1KHZ
1KHZ
65m
83m
94m
0.13
0.16
2.45
2.10
1.95
1.70
1.55
2.95
2.66
2.40
2.20
2.00
100
10
1
560
100
DC cur r ent ( mA)
SCH74-330
SCH74-390
33
39
1KHZ
1KHZ
0.17
0.21
1.45
1.30
1.80
1.68
0. 1
10
100
1000
DC current (mA)
10000
100000
SCH74-470
47
1KHZ
0.23
1.20
1.55
SCH74-560
SCH74-680
56
68
1KHZ
1KHZ
0.26
0.35
1.15
1.00
1.43
1.33
80
BCH74B
SCH74 Temperature r rise by current
SCH74-820
SCH74-101
SCH74-121
SCH74-151
SCH74-181
82
100
120
150
180
1KHZ
1KHZ
1KHZ
1KHZ
1KHZ
0.48
0.55
0.62
0.72
0.82
0.92
0.81
0.73
0.71
0.66
1.23
1.00
0.85
0.76
0.66
70
60
50
40
30
20
471
560
100
SCH74-221
SCH74-271
220
270
1KHZ
1KHZ
1.08
1.38
0.55
0.48
0.56
0.50
10
SCH74-331
SCH74-391
330
390
1KHZ
1KHZ
1.55
2.09
0.40
0.38
0.47
0.46
0
500
1000 1500
2000 2500 3000
ent
DC current (mA) mA)
3500
4000
4500
SCH74-471
470
1KHZ
2.39
0.33
0.44
(1). Inductance tolerance for 10uH~22uH: ± 15%, for 27uH~470uH: ± 10%. Tested at 0.25V, 0ADC and 25 ℃
(2). DCR measured at 25 ℃ .
(3). The DC current at which the inductance decreases by 10% from its initial value.
(4). The DC current that results in a 40 ℃ temperature rise from 25 ℃ ambient.
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65
? 2011 Signal Transformer –Specification subject to change without notice. 07.11
500 Bayview Avenue, Inwood, NY 11096
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