SCH74
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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)
Saturation
Current
(A)
Temperature
Current
(A)
SCH74-120 12 1KHZ 65m 2.45 2.95
SCH74-180 18 1KHZ 94m 1.95 2.40
SCH74-270 27 1KHZ 0.16 1.55 2.00
SCH74-390 39 1KHZ 0.21 1.30 1.68
SCH74-560 56 1KHZ 0.26 1.15 1.43
SCH74-820 82 1KHZ 0.48 0.92 1.23
SCH74-121 120 1KHZ 0.62 0.73 0.85
SCH74-181 180 1KHZ 0.82 0.66 0.66
SCH74-271 270 1KHZ 1.38 0.48 0.50
SCH74-391 390 1KHZ 2.09 0.38 0.46
(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.
(3)
(4)
XXX
MARKING
0. 1
1
10
100
1000
100
1000
10000
10
BCH74 I nduct ance decr ease by cur r ent
I nduct ance( uH)
DC cur r ent ( mA)
100000
471
560
100
500
1000
1500
2000
2500
3000
3500
0
4000
BCH74B Temper at ur e r i se by cur r ent
Temper at ur e r i se ℃
DC cur r ent ( mA)
80
70
60
50
40
30
20
10
4500
471
560
100
SCH74 Inductance decrease by current
SCH74 Temperature rise by current
DC current (mA)
DC current (mA)
Custom versions available upon request.
©2011 Signal Transformer –Specification subject to change without notice. 07.11
