Temperature
(°C)
25
75
125
175
225
275
003052002051001050
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
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
.
Refl ow 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, 10 sec. max.
Temperature Rise ......30 °C max. at IDC
Electrical Specifications
Part Number
Impedance
@ 100 MHz Rated
Voltage
(VDC)
Withstanding
Voltage
(DC)
Insulation
Resistance
(MΩ) Min.
DCR
Max.
(Ω)
IDC
Max.
(mA)(Ω)
Tolerance
(%)
SRF2012-300YA 30 ±25 50 125 10 0.20 400
SRF2012-670YA 67 ±25 50 125 10 0.25 400
SRF2012-900YA 90 ±25 50 125 10 0.30 400
SRF2012-121YA 120 ±25 50 125 10 0.30 400
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 0.40 300
SRF2012-221YA 220 ±25 50 125 10 0.40 300
SRF2012-261YA 260 ±25 50 125 10 0.40 300
SRF2012-301YA 300 ±25 50 125 10 0.50 300
SRF2012-361YA 360 ±25 50 125 10 0.50 300
SRF2012-371YA 370 ±25 50 125 10 0.50 300
SRF2012-501YA 500 ±25 50 125 10 0.50 300
SRF2012-671YA 670 ±25 50 125 10 0.60 140
SRF2012-901YA 900 ±25 50 125 10 0.88 100
General Specifications
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal ....................................Ag/Ni/Sn
Packaging ....... 2000 pcs. per 7-inch reel
Materials
Product Dimensions
*RoHS COMPLIANT
Soldering Profile
1.25
(.049)
0.45
(.018)
1.1
(.043) 2.6
(.102)
12
43
DIMENSIONS: MM
(INCHES)
Schematic
How to Order
SRF2012 - 201 Y A
Model
Value Code (see table)
Tolerance Code
Model Suffix
1
4
2
3Recommended Layout
* 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.
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on
the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf
SRF2012A Series - Common Mode Chip Inductors
Typical Impedance vs. Frequency Curves
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
1 10 100
Frequency (MHz)
SRF2012-900YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-161YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
1 10 100
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
1 10 100
Frequency (MHz)
SRF2012-300YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SRF0504 Series - Line Filter
SRF2012A Series - Common Mode Chip Inductors
Typical Impedance vs. Frequency Curves (Continued)
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-261YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-361YA
Impedance (Ohms)
1000 10000
Normal Mode
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-301YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-371YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
10000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-501YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
10000
100
10
1
0.1
1 10 100
Frequency (MHz)
SRF2012-671YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
1000
10000
100
10
1
1 10 100
Frequency (MHz)
SRF2012-901YA
Impedance (Ohms)
1000 10000
Common Mode
Normal Mode
Common Mode
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SRF2012A Series - Common Mode Chip Inductors
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)
Packaging Specifications
DIMENSIONS: MM
(INCHES)
QTY: 2000 PCS. PER REEL
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
REV. 09/16
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
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The Americas: Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
P[ZHɉSPH[LZJVSSLJ[P]LS`¸)V\YUZ¹
Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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The characteristics and parameters of a Bourns® product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
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