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*RoHS COMPLIANT
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
Electrical Specifi cations
Impedance
Part Number
@ 100 MHz
Tolerance
(%)
Rated
Voltage
(VDC)
Withstanding
Voltage
(DC)
Insulation
Resistance
(MΩ) Min.
DCR
Max.
(Ω)
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
Soldering Profi le
275
<1> Maximum of 10 seconds between
+255°C and +260°C
225
175
(°C)
150°C
125
Temperature
75
25
0 50 100 150 200 250 300
120 - 150 seconds
Ramp Up
3°C/second maximum
How to Order
SRF2012 - 201 Y A
Model
190°C
Time (seconds)
<1> 255°C
220°C
seconds
10 seconds minimum
Schematic
1
Value Code (see table)
Tolerance Code
4
Model Suffi x
60 - 90
260°C peak
Ramp Down
6°C/second
maximum
Rev. 02/22/05
IDC
Max.
(mA)(Ω)
2
3
General Specifi cations
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
Materials
Core ..............................................Ferrite
Wire ........................... Enameled copper
Terminal ................................... Ag/Ni/Sn
Packaging .......2000 pcs. per 7-inch reel
Product Dimensions
2.0 ± 0.2
(.079 ± .008)
0.15 ± 0.1
0.55 ± 0.1
( .022 ± .004)
1.2 ± 0.2
(.047 ± .008)
(.006 ± .004)
12
4
0.46 ± 0.1
( .018 ± .004)
3
( .018 ± .004)
0.55 ± 0.1
( .022 ± .004)
1.2 ± 0.2
(.047 ± .008)
0.46 ± 0.1
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
* 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.
Recommended Layout
12
4
1.1
(.043)
(.102)
DIMENSIONS:
(INCHES)
3
2.6
MM
0.45
(.018)
1.25
(.049)
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SRF2012A Series - Common Mode Chip Inductors
Typical Impedance vs. Frequency Curves
1000
SRF2012-670YA
1000
SRF2012-900YA
100
10
Impedance (Ohms)
0.1
1000
100
10
1
Impedance (Ohms)
0.1
1000
100
Common Mode
1
1 10 100
Common Mode
1 10 100
Common Mode
Normal Mode
Frequency (MHz)
SRF2012-121YA
Normal Mode
Frequency (MHz)
SRF2012-181YA
1000 10000
1000 10000
100
Common Mode
10
1
Impedance (Ohms)
0.1
110100
Frequency (MHz)
1000
100
Impedance (Ohms)
Common Mode
10
1
0.1
110100
SRF2012-161YA
Frequency (MHz)
1000
100
Common Mode
SRF2012-201YA
Normal Mode
1000 10000
Normal Mode
1000 10000
10
1
Impedance (Ohms)
0.1
1 10 100
1000
100
Impedance (Ohms)
Common Mode
10
1
0.1
1 10 100
Normal Mode
Frequency (MHz)
SRF2012-221YA
Normal Mode
Frequency (MHz)
1000 10000
1000 10000
10
Normal Mode
1
Impedance (Ohms)
0.1
110100
1000 10000
Frequency (MHz)
1000
100
Impedance (Ohms)
Common Mode
10
1
0.1
110100
SRF2012-261YA
Normal Mode
1000 10000
Frequency (MHz)
Customers should verify actual device performance in their specifi c applications.
Specifi cations are subject to change without notice.
Page 3
SRF0504 Series - Line Filter
SRF2012A Series - Common Mode Chip Inductors
Typical Impedance vs. Frequency Curves (Continued)
10000
SRF2012-361YA
1000
100
Impedance (Ohms)
0.1
Common Mode
10
1
1 10 100
Packaging Specifi cations
9.0 ± 0.5
(.354 ± .020)
13.5 ± 0.5
(.531 ± .020)
DIA.
178 ± 2
(7.008 ± .079)
Normal Mode
Frequency (MHz)
60 ± 2
(2.362 ± .079)
1000 10000
13.5 ± 0.5
R
(.531 ± .020)
1.9
R
(.075)
120 °
20.5
(.807)
R
(.413)
R
10.5
0.5
(.020)
1.75 ± 0.1
(.069 ± .004)
3.5 ± 0.05
(.138 ± .002)
2.0 ± 0.05
(.079 ± .002)
(.157 ± .004)
4.0 ± 0.1
4.0 ± 0.1
(.157 ± .004)
USER DIRECTION OF FEED
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.
A
A
1.5 + 0.1
(.059 + .004)
1.50 ± 0.1
(.059 ± .004)
DIA.
8.0 ± 0.1
(.315 ± .004)
1.1 + 0.1
(.043 + .004)
2.35 ± 0.1
(.093 ± .004)
DIA.
0.22 ± 0.05
(.009 ± .002)
SECTION A-A
DIMENSIONS:
(INCHES)
1.45 ± 0.1
(.057 ± .004)
MM
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