FDH1040 / FDH1040B Series
IRON POWDER SURFACE MOUNT FIXED INDUCTOR
March 2006 1
© 2006 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-277-FDH1040
R-LOG0306A
TYPE FDH1040 / FDH1040B
TYPE FDH1040 / FDH1040B
Inductance Range: 0.36 - 0.56μH
Frequency Range: 0.1 - 5MHz
Features
• Compact size: 11.5mm x 10.5mm
• Low prole: 4.0mm maximum
• High DC current: 24.0A at 0.36μH
• Magnetically shielded
• Low DC resistance
• Low audible noise
• Reow solderable
• Packaged on 500 piece reels
• Lead-free terminations
TOKO
Part
Number
Inductance (1)
(μH)
100
100
100
100
±20
±20
±20
±20
Tolerance
( % )
Test
Freq.
(kHz)
Temperature (3)
Rise Current
[+40°C] (A) max.
Dimensions
Note: =P3 is added to each part number to indicate tape and reel packaging.
Description
The TOKO FDH1040 / FDH1040B Series is a compact, high-cur-
rent
surface mount xed inductor with a maximum DC current
rating of 24 Amps. Manufactured with a proprietary iron powder
composition and process, the product is specically designed for
high current, space constrained DC-DC converter applications
in portable computing, point-of-load modules, and computer
peripherals.
STANDARD PARTS SELECTION GUIDE
(1) Inductance is measured by LCR-meter 4284A (Agilent) or equivalent.
(2) DC resistance is measured by Digital Multimeter 34420A (Agilent) or equivalent.
(3) Maximum allowable DC current is that which causes a 20% inductance reduction from the initial value,
or coil temperature to rise by 40°C, whichever is smaller. (Reference ambient temperature 20°C).
Unit: mm
1.4
1.4
1.9
1.9
DC (2)
Resistance
(mΩ) max.
28.0
28.0
22.0
22.0
Inductance (3)
Decrease Current
[-20%] (A) max.
24.0
24.0
20.0
20.0
FDH1040
FDH1040B
Recommended Patterns:
FDH1040 FDH1040B
Unit: mm
FDH1040-R36M=P3
FDH1040B-R36M=P3
FDH1040-R56M=P3
FDH1040B-R56M=P3
0.36
0.36
0.56
0.56
30
30
30
30
Absolute
Max.
Voltage (V)
FDH1040 / FDH1040B Series
IRON POWDER SURFACE MOUNT FIXED INDUCTOR
March 2006 2
© 2006 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-277-FDH1040
R-LOG0306A
TOKO America, Inc.
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864 Web: http://www.tokoam.com
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specication or manu-
facture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of
patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
TYPICAL CHARACTERISTICS
µ
µ
µ
µ
µ
