100
6.80 ± 0.20
(.268 ± .008)
7.30
(.287)
6.80 ± 0.20
(.268 ± .008)
2.30
(.091)
TYP.
2.20
(.087)
TYP.
2.30
(.091)
TYP.
2.60
(.102)
REF.
2.10
(.083)
REF.
2.60
(.102)
REF.
2.70
(.106)
REF.
REF.
R
3.80 ± 0.20
(.150 ± .008)
Features
■ Formerly model
■ Height of 4.0 mm max.
■ Current rating up to 3.5 A
■ RoHS compliant*
Applications
■ Input/output of DC/DC converters
■ Power supplies for:
• Portable communication equipment
• Camcorders
• LCD TVs
• Car radios
PM638S Series - Shielded SMD Power Inductor
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
General Specifi cations
Test Voltage .................... 0.1 V, 100 KHz
Refl ow Soldering ....230 ˚C; 50 sec max.
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature .. -40 °C to +125 °C
Resistance to Soldering Heat
...............................260 °C for 10 sec.
Materials
Core Material ................................Ferrite
Wire ...........................Enameled Copper
Adhesive ............................. Epoxy Resin
Terminal ....................................Ag/Ni/Sn
Rated Current .......Ind. drop of 35 % typ.
at Isat
Temperature Rise ....... 30 ˚C typ. at Irms
Packaging .................. 1000 pcs. per reel
DIMENSIONS:
MM
(INCHES)
Product Dimensions
Electrical Specifi cations
Recommended Layout
Inductance 100 kHz Test SRF DCR
Q Frequency Typ. Max.
Irms Isat
Bourns Part No. (µH) Tol. % Ref. (MHz) (MHz) (mΩ) (A) (A)
PM638S-3R3-RC 3.3 ±30 9.8 7.96 75.9 20 3.50 3.60
PM638S-5R0-RC 5.0 ±30 8.9 7.96 42.6 24 2.90 2.95
PM638S-6R2-RC 6.2 ±30 9.0 7.96 42.3 27 2.50 2.60
PM638S-7R4-RC 7.4 ±30 7.5 7.96 32.9 31 2.30 2.55
PM638S-8R2-RC 8.2 ±30 7.4 7.96 29.6 34 2.20 2.45
PM638S-8R7-RC 8.7 ±30 7.3 7.96 27.5 34 2.20 2.35
PM638S-100-RC 10 ±30 8.8 2.52 24.9 38 2.00 2.05
PM638S-120-RC 12 ±30 8.3 2.52 17.9 53 1.70 1.95
PM638S-150-RC 15 ±30 8.6 2.52 18.0 57 1.60 1.90
PM638S-180-RC 18 ±30 8.0 2.52 13.8 92 1.50 1.70
PM638S-220-RC 22 ±30 8.8 2.52 13.9 96 1.30 1.60
PM638S-270-RC 27 ±30 7.7 2.52 12.5 109 1.20 1.30
PM638S-330-RC 33 ±30 8.6 2.52 12.5 124 1.10 1.20
PM638S-390-RC 39 ±30 8.3 2.52 11.8 138 1.00 1.10
PM638S-470-RC 47 ±30 8.5 2.52 10.4 155 0.95 1.00
PM638S-560-RC 56 ±30 8.2 2.52 8.8 202 0.85 0.90
PM638S-680-RC 68 ±30 7.4 2.52 7.5 234 0.75 0.87
PM638S-820-RC 82 ±30 7.6 2.52 7.6 324 0.70 0.75
PM638S-101-RC 100 ±30 6.7 0.796 6.2 358 0.65 0.68
Soldering Profi le
Temperature
(°C)
25
75
125
175
225
275
0 50 100 150 200 250 300
Time (seconds)
120 - 150 seconds
60 - 90
seconds
260°C peak
190°C
150°C
220°C
Ramp Down
6°C/second
maximum
<1> 255°C
<1> Maximum of 10 seconds between
+255°C and +260°C
Ramp Up
3°C/second maximum
10 seconds minimum
Rev. 02/22/05
Electrical Schematic
LCR METER
