Features
Applications
■ High impedance value
■ Current rating up to 400 mA
■ RoHS compliant* and halogen free**
■ Noise suppression
■ Personal computers
■ Display panels
SRF2012A Series - Common Mode Chip Inductors
Electrical Specifications
General Specifications
Reflow 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
Impedance
@ 100 MHz
Rated
Tolerance Voltage
Withstanding
Voltage
Insulation
Resistance
(MΩ) Min.
DCR
Max.
(Ω)
IDC
Max.
(mA)
Part Number
(Ω)
67
(%)
25
25
25
25
25
25
25
25
25
(VDC)
(DC)
SRF2012-670YA
SRF2012-900YA
SRF2012-121YA
SRF2012-161YA
SRF2012-181YA
SRF2012-201YA
SRF2012-221YA
SRF2012-261YA
SRF2012-361YA
50
125
125
125
125
125
125
125
125
125
10
10
10
10
10
10
10
10
10
0.25
0.3
400
400
400
350
350
300
300
300
300
90
50
.......................... 260 °C, 10 sec. max.
Temperature Rise ......30 °C max. at IDC
120
160
180
200
220
260
360
50
0.3
50
0.35
0.35
0.4
50
Materials
50
Core..............................................Ferrite
Wire ........................... Enameled copper
Terminal ................................... Ag/Ni/Sn
Packaging.......2000 pcs. per 7-inch reel
50
0.4
50
0.4
50
0.45
Soldering Profile
Product Dimensions
275
2.0 0.2
(.079 .008ꢁ
<ꢀ> Maximum of ꢀ0 seconds between
+255°C and +260°C
260°C peak
<ꢀ> 255°C
225
ꢀ75
ꢀ25
75
220°C
Ramp Down
6°C/second
maximum
ꢀ90°C
60 - 90
seconds
ꢀ50°C
0.ꢀ5 0.ꢀ
(.006 .004ꢁ
0.46 0.ꢀ
ꢀ20 - ꢀ50 seconds
( .0ꢀ8 .004ꢁ
ꢀ
2
ꢀ0 seconds minimum
Ramp Up
3°C/second maximum
25
0
50
ꢀ00
ꢀ50
200
250
300
0.46 0.ꢀ
( .0ꢀ8 .004ꢁ
3
Rev. 02/22/05
4
Time (seconds)
0.55 0.ꢀ
( .022 .004ꢁ
0.55 0.ꢀ
( .022 .004ꢁ
How to Order
Schematic
SRF2012 - 201 Y A
ꢀ
2
3
ꢀ.2 0.2
(.047 .008ꢁ
Model
Value Code (see table)
Tolerance Code
Model Suffix
4
ꢀ.2 0.2
(.047 .008ꢁ
Recommended Layout
Asia-Pacific: 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
ꢀ
4
2
3
ꢀ.25
(.049ꢁ
0.45
(.0ꢀ8ꢁ
ꢀ.ꢀ
(.043ꢁ
2.6
(.ꢀ02ꢁ
*
RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
** Bourns follows the prevailing definition of “halogen free” in the industry. Bourns considers a product to be
“halogen free” if (aꢁ the Bromine (Br ꢁ content is 900 ppm or less; (bꢁ the Chlorine ( Cl ꢁ content is 900 ppm or less;
and (cꢁ the total Bromine (Brꢁ and Chlorine ( Cl ꢁ content is ꢀ500 ppm or less.
Specifications are subject to change without notice.
MM
(INCHESꢁ
DIMENSIONS:
Customers should verify actual device performance in their specific applications.