Features
n Shielded construction
n Flat wire
n Unit height of 1.2 mm
n Inductance range: 0.22 to 1.5 μH
n Rated current up to 9 A
n RoHS compliant* and halogen free**
SRP4012 Series - Shielded Power Inductors
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
**Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br)
and Chlorine (Cl) content is 1500 ppm or less.Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
Electrical Specications
Product Dimensions
DIMENSIONS:
MM
(INCHES)
Recommended Layout
Bourns Part No.
Inductance
L (μH) ±20 %
I rms
(A)
I sat
(A)
DCR
(mΩ) Max.
SRP4012-R22M 0.22 9 10 9.3
SRP4012-R47M 0.47 6.5 9 20
SRP4012-R56M 0.56 5.5 8 25
SRP4012-1R0M 1.0 4.8 6.3 33.6
SRP4012-1R2M 1.2 3 6 45
SRP4012-1R5M 1.5 3 5.5 50
Soldering Prole
25
75
125
175
225
275
050 100 150200 25
00
Time (Seconds)
Temperature(°C)
120-150 seconds
60 seconds
maximum
260 °C peak
190°C
150 °C
220 °C
Ramp Down
5 °C/second
<1> 255 °C
<1>Maximum of 10 seconds
between +255 °C and +260 °C
Ramp Up
4 °C/second maximum
10 secondsminimum
25
75
125
175
225
275
050100 150200 250300
Time (Seconds)
Temperature(°C)
120-150seconds
60 seconds
maximum
150 °C
183 °C
170 °C
Ramp Down
5 °C/second
<1> 245 °C
<1>5 seconds maximum
at +245 °C
Ramp Up
4 °C/second maximum
10 secondsminimum
4.5
(.177)
1.5
(.060)
2.5
(.099)
Electrical Schematic
General Specications
Test Voltage ..................................0.25 V
Test Frequency ......................... 100 KHz
Reow Soldering .. 230 °C; 50 sec. max.
Operating Temperature
................................-55 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-55 °C to +125 °C
Resistance to Soldering Heat
.............................+260 °C for 10 sec.
Materials
Core .................................................. Iron
Wire ............................Enameled copper
Terminal ........................................ Cu/Sn
Rated Current ..... Ind. drops 20 % at Isat
Temperature Rise .....40 °C at rated Irms
Packaging ..... 2000 pcs. per 13-inch reel
R22
R22
4.7
(.185)
MAX.
1.0 ± 0.3
(.039 ± .012)
0.0 - 0.3
(0.0 - .012)
0.6 ± 0.1
(.024 ± .004)
4.0 ± 0.2
(.157 ± .008)
4.0 ± 0.2
(.157 ± .008)
1.2
(.047)
MAX.
6.0
(.236)
1.5
(.059)
2.2
(.087)
R22
4.7
(.185)
MAX.
1.0 ± 0.3
(.039 ± .012)
0.0 - 0.3
(0.0 - .012)
0.6 ± 0.1
(.024 ± .004)
4.0 ± 0.2
(.157 ± .008)
4.0 ± 0.2
(.157 ± .008)
1.2
(.047)
MAX.
6.0
(.236)
1.5
(.059)
2.2
(.087)
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
This series is currently available but
not recommended for new designs.
The newer Model SRP4012TA
series is recommended.
Asia-Pacic: Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA: Tel: +36 88 520 390 • Email: eurocus@bourns.com
The Americas: Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
