CO
M
PL
IA
N
T
Features
■
Formerly
■
Height of 3.0 mm max.
■
Current rating up to 3.1 A
■
RoHS compliant*
Applications
model
■
Input/output of DC/DC converters
■
Power supplies for:
*R
oH
S
•
•
•
•
Portable communication equipment
Camcorders
LCD TVs
Car radios
PM428S Series - Shielded SMD Power Inductor
Electrical Specifications
Inductance 100 kHz
General Specifications
Q
Ref.
9.34
9.18
9.24
8.64
7.72
8.58
8.12
9.56
9.624
8.24
11.26
11.26
9.66
11.64
8.26
10.76
9.7
9.74
10.88
9
8.42
8.6
8.78
13.32
11.72
13.86
Test
Frequency
(MHz)
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
7.96
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
2.52
0.796
0.796
0.796
0.796
SRF
Typ.
(MHz)
176
146
111
92
76
56
55
69
77
45
34
25
27
25
23
18
16
14
13
13
11
8
9
8
6
7
DCR
Max.
(mΩ)
20
25
28
30
35
60
70
85
90
100
110
125
150
160
185
200
230
250
280
320
400
520
600
700
860
1000
Irms
(A)
3.10
2.70
2.50
2.35
2.15
1.72
1.55
1.38
1.30
1.25
1.19
1.12
1.03
0.98
0.93
0.89
0.82
0.80
0.75
0.70
0.63
0.56
0.51
0.47
0.42
0.39
Isat
(A)
2.56
2.20
2.05
1.80
1.65
1.50
1.30
1.20
1.15
1.05
1.00
0.85
0.78
0.75
0.72
0.60
0.58
0.50
0.48
0.41
0.36
0.32
0.30
0.28
0.26
0.23
Bourns Part No.
PM428S-1R2-RC
PM428S-1R8-RC
PM428S-2R2-RC
PM428S-2R7-RC
PM428S-3R3-RC
PM428S-3R9-RC
PM428S-4R7-RC
PM428S-5R6-RC
PM428S-6R8-RC
PM428S-8R2-RC
PM428S-100-RC
PM428S-120-RC
PM428S-150-RC
PM428S-180-RC
PM428S-220-RC
PM428S-270-RC
PM428S-330-RC
PM428S-390-RC
PM428S-470-RC
PM428S-560-RC
PM428S-680-RC
PM428S-820-RC
PM428S-101-RC
PM428S-121-RC
PM428S-151-RC
PM428S-181-RC
(µH)
1.2
1.8
2.2
2.7
3.3
3.9
4.7
5.6
6.8
8.2
10
12
15
18
22
27
33
39
47
56
68
82
100
120
150
180
Tol. %
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
±30
Test Voltage .................... 0.1 V, 100 KHz
Reflow 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 .................. 2000 pcs. per reel
Product Dimensions
4.80 ± 0.20
(.189 ± .008)
6R8
4.80 ± 0.20
(.189 ± .008)
2.80 ± 0.20
(.110 ± .008)
1.60
(.063)
TYP.
Soldering Profile
275
<1> Maximum of 10 seconds between
+255°C and +260°C
260°C peak
<1> 255°C
225
220°C
190°C
60 - 90
seconds
Ramp Down
6°C/second
maximum
TYP.
1.60
(.063)
1.60
(.063)
TYP.
Temperature (°C)
175
150°C
Recommended Layout
125
120 - 150 seconds
10 seconds minimum
75
Ramp Up
3°C/second maximum
5.30
REF.
(.209)
2.00
(.079)
REF.
25
0
50
100
150
200
250
Rev. 02/22/05
300
R
Time (seconds)
1.80
(.071)
REF.
REF.
1.50
(.059)
2.00
(.079)
REF.
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
DIMENSIONS:
MM
(INCHES)
PM428S Series - Shielded SMD Power Inductor
Inductance vs. Current
7
5
3
2
102
7
5
3
2
101
7
5
3
2
100
7
101
2
Electrical Schematic
561
151
Inductance (µH)
330
100
4R7
LCR METER
1R2
3
5
7 102
2
3
5
7 103
2
3
5
7 104
DC Current (mA)
Packaging Specifications
178.0
(7.00)
DIA.
2.0
±
0.5
(.079
±
.020)
16.5
(.650)
21.0
±
0.8
(.827
±
.032)
DIA.
13.0
(.511)
50.0 - 0
(1.969 - 0)
13.0
DIA.
(.511)
14.0 + 0
(.551 + 0)
8.0
(.315)
4.0
(.157)
END
START
6R8
6R8
6R8
6R8
NO COMPONENT
NO COMPONENT
COMPONENTS
200
(7.87)
400
(15.75)
USER DIRECTION OF FEED
DIMENSIONS:
REV. 03/11
QTY: 2000 PCS. PER REEL
MM
(INCHES)
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Special Edition for Assessment Centres
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