Features
■ Semi-shielded construction
■ Low profi le: 1.2 mm
■ Inductance range: 0.47 to 22 µH
■ Rated current up to 3.2 A
■ RoHS compliant* and halogen free**
Applications
■ DC/DC converters
■ Notebook computers
■ Digital video cameras
■ HDDs
■ Cellphones
■ Televisions, LCD displays
SRN4012T Series - Semi-shielded Power Inductors
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
**Bourns follows the prevailing defi nition of “halogen free” in the industry. 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.
Specifi cations 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 specifi c applications.
Operating Temperature
................................. -40 °C to +125 °C
(Temperature rise included)
Storage Temperature .. -40 °C to +125 °C
Resistance to Solder Heat
...............................+260 °C for 10 sec.
Temperature Rise .....40 °C at rated Irms
Rated Current
............ Inductance drops 30 % at Isat
Electrical Specifi cations @ 25 °C
Bourns Part No.
Inductance
@ 100 KHz / 1 V
Q (Min.)
@
100 kHz /
1 V
SRF
(MHz)
Typ.
DCR
(Ω)
±20 %
Irms
(A)
Isat
(A)L (μH) Tol. %
SRN4012T-R47M 0.47 ± 20 6 140 0.025 3.2 4
SRN4012T-1R0M 1.0 ± 20 6 100 0.042 2.2 2.8
SRN4012T-1R5M 1.5 ± 20 6 90 0.05 2 2.2
SRN4012T-2R2M 2.2 ± 20 6 70 0.06 1.9 1.65
SRN4012T-3R3M 3.3 ± 20 6 60 0.07 1.7 1.4
SRN4012T-4R7M 4.7 ± 20 6 45 0.095 1.5 1.2
SRN4012T-6R8M 6.8 ± 20 6 35 0.125 1.3 0.9
SRN4012T-100M 10 ± 20 10 30 0.18 1.1 0.8
SRN4012T-150M 15 ± 20 10 24 0.26 0.75 0.65
SRN4012T-220M 22 ± 20 10 18 0.4 0.62 0.5
General Specifi cations
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Coating .................Magnetic epoxy resin
Packaging ..... 4500 pcs. per 13-inch reel
Materials
Product Dimensions
Recommended Layout
Electrical Schematic
DIMENSIONS: MM
(INCHES)
*RoHS COMPLIANT
How to Order
SRN4012T - R47M
Model
Value Code (see table)
Soldering Profi le
4.2
(.165)
4.2
(.165)
4.0 ± 0.2
(.157 ± .008)
4.0 ± 0.2
(.157 ± .008)
1.2
(.047)
1.2
(.047)
MAX.
2.5
(.098)
REF.
1.1
(.043)
REF.
1.1
(.043)
REF.
25
Temperature (°C)
Time (Seconds)
Preheating Soldering Natural Cooling
217 °C
tp (245 °C, 20~40 Sec.)
200 °C
150°C
60~180
Sec.
480 Sec. Max.
60~150 Sec.
TP (260 °C / 10 Sec. Max.)
SRF0504 Series - Line Filter
L vs. IDC
Specifi cations 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 specifi c applications.
SRN4012T Series - Semi-shielded Power Inductors
0
01 2 34 5
0.2
0.4
0.6
0.8
Inductance (μH)
DC Current (A)
SRN4012T-R47M
0
01 2 34
0.5
1.0
2.0
1.5
2.5
Inductance (μH)
DC Current (A)
SRN4012T-1R5M
0
012
34 5
0.5
1.0
1.5
2.0
Inductance (μH)
DC Current (A)
SRN4012T-1R0M
0
0 0.7 1.4 2.1 2.8
1
2
3
4
Inductance (μH)
DC Current (A)
SRN4012T-2R2M
0
0 0.5 1.0 1.5 2.0
1.5
3.0
4.5
5.0
Inductance (μH)
DC Current (A)
SRN4012T-3R3M
0
0 0.5 1.0 1.5 2.0
2
4
6
8
Inductance (μH)
DC Current (A)
SRN4012T-4R7M
0
0 0.4 0.8 1.2 1.6
3
6
9
12
Inductance (μH)
DC Current (A)
SRN4012T-6R8M
0
0 0.3 0.6 0.9 1.2
5
10
15
20
Inductance (μH)
DC Current (A)
SRN4012T-100M
0
0 0.2 0.4 0.6 0.8 1.0
5
10
15
15
20
Inductance (μH)
DC Current (A)
SRN4012T-150M
0
0 0.2 0.4 0.6 0.8 1.0
10
20
30
40
Inductance (μH)
DC Current (A)
SRN4012T-220M
SRF0504 Series - Line Filter
Specifi cations 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 specifi c applications.
SRN4012T Series - Semi-shielded Power Inductors
Packaging Specifi cations
DIMENSIONS: MM
(INCHES)
QTY: 4500 PCS. PER REEL
REV. 05/15
Asia-Pacifi c: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
EMEA: Tel: +36 88 520 390 • Fax: +36 88 520 211
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
12.0 ± 1.5
(.472 ± .059)
100.0 ± 0.5
(3.937 ± .020)
330 ± 0.5
(12.99 ± .020)
DIA.
13.2 ± 0.5
(.520 ± .020)
DIA.
2.0 ± 0.5
(.079 ± .020) 13.5 ± 0.5
(.531 ± .020)
120 °
10.5
(.413) R
0.5
(.020) R
1.8
(.071)
R
12.0 ± 0.1
(.472 ± .004)
2.0 ± 0.05
(.079 ± .002)
4.0 ± 0.1
(.157 ± .004)
8.0 ± 0.1
(.315 ± .004)
0.25 ± 0.05
(.010 ± .002)
4.50 ± 0.1
(.177 ± .004)
BOTTOM VIEW
1.55 ± 0.1
(.061 ± .004)
4.35 ± 0.1
(.171 ± .004)
USER DIRECTION OF FEED
