0.46 ± 0.1
( .018 ± .004)
0.55 ± 0.1
( .022 ± .004)
0.55 ± 0.1
( .022 ± .004)
0.46 ± 0.1
( .018 ± .004)
1.2 ± 0.2
(.047 ± .008)
0.15 ± 0.1
(.006 ± .004)
1.2 ± 0.2
(.047 ± .008)
2.0 ± 0.2
(.079 ± .008)
12
43
Features
■ High impedance value
■ Current rating up to 400 mA
■ RoHS compliant* and halogen free**
Applications
■ Noise suppression
■ Personal computers
■ Display panels
SRF2012A Series - Common Mode Chip Inductors
* RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
** 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.
Customers should verify actual device performance in their specifi c applications.
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, 10 sec. max.
Temperature Rise ......30 °C max. at IDC
Electrical Specifi cations
Part Number
Impedance
@ 100 MHz Rated
Voltage
(VDC)
Withstanding
Voltage
(DC)
Insulation
Resistance
(MΩ) Min.
DCR
Max.
(Ω)
IDC
Max.
(mA)(Ω)
Tolerance
(%)
SRF2012-670YA 67 ±25 50 125 10 0.25 400
SRF2012-900YA 90 ±25 50 125 10 0.3 400
SRF2012-121YA 120 ±25 50 125 10 0.3 400
SRF2012-161YA 160 ±25 50 125 10 0.35 350
SRF2012-181YA 180 ±25 50 125 10 0.35 350
SRF2012-201YA 200 ±25 50 125 10 0.4 300
SRF2012-221YA 220 ±25 50 125 10 0.4 300
SRF2012-261YA 260 ±25 50 125 10 0.4 300
SRF2012-361YA 360 ±25 50 125 10 0.45 300
General Specifi cations
Core ..............................................Ferrite
Wire ........................... Enameled copper
Terminal ................................... Ag/Ni/Sn
Packaging .......2000 pcs. per 7-inch reel
Materials
Product Dimensions
Schematic
How to Order
SRF2012 - 201 Y A
Model
Value Code (see table)
Tolerance Code
Model Suffi x
*RoHS COMPLIANT
1
4
2
3
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
1.25
(.049)
0.45
(.018)
1.1
(.043) 2.6
(.102)
12
43
Asia-Pacifi c: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
DIMENSIONS: MM
(INCHES)
Recommended Layout
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-670YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-121YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
110100
Frequency (MHz)
SRF2012-900YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
110100
Frequency (MHz)
SRF2012-161YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
110100
Frequency (MHz)
SRF2012-201YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-181YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-221YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
110100
Frequency (MHz)
SRF2012-261YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
SRF2012A Series - Common Mode Chip Inductors
Typical Impedance vs. Frequency Curves
USER DIRECTION OF FEED
1.45 ± 0.1
(.057 ± .004)
0.22 ± 0.05
(.009 ± .002)
2.35 ± 0.1
(.093 ± .004)
1.5 + 0.1
(.059 + .004) DIA.
1.1 + 0.1
(.043 + .004) DIA.
A
A
1.50 ± 0.1
(.059 ± .004) SECTION A-A
8.0 ± 0.1
(.315 ± .004)
1.75 ± 0.1
(.069 ± .004)
3.5 ± 0.05
(.138 ± .002)
4.0 ± 0.1
(.157 ± .004)
4.0 ± 0.1
(.157 ± .004)
2.0 ± 0.05
(.079 ± .002)
SRF0504 Series - Line Filter
Packaging Specifi cations
DIMENSIONS: MM
(INCHES)
QTY: 2000 PCS. PER REEL
06/11
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
SRF2012A Series - Common Mode Chip Inductors
9.0 ± 0.5
(.354 ± .020)
60 ± 2
(2.362 ± .079)
178 ± 2
(7.008 ± .079)
13.5 ± 0.5
(.531 ± .020)
DIA.
120 °
1.9
(.075)
R
13.5 ± 0.5
(.531 ± .020)
R
20.5
(.807)
0.5
(.020)
R
10.5
(.413)
R
1000
10000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-361YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
Typical Impedance vs. Frequency Curves (Continued)
