*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** Bourns follows the prevailing definition 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.
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.
WARNING Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
Model
SRF1280A Series - Dual-Winding Shielded Power Inductors
Inductance vs. IDC
SRF1280A-470M
50.0
40.0
600.0
900.0
30.0
20.0
10.0
0.0
0.0
L @ 25 °C
L @ 125 °C
800.0
SRF1280A-681M
L @ 25 °C
L @ 125 °C
1200.0
SRF1280A-102M
L @ 25 °C
L @ 125 °C
L (µH)
L (µH)
L (µH)
0.3
0.6
0.9
1.2
400.0
600.0
200.0
300.0
1.1
2.2
3.3
4.4
0.0
0.0
0.0
0.0
0.2
0.4
0.6
0.8
1.0
IDC (A)
Temperature Rise vs. IDC
SRF1280A-470M
100.0
80.0
ΔT
@ 25 °C
100.0
80.0
IDC (A)
IDC (A)
SRF1280A-681M
ΔT
@ 25 °C
100.0
80.0
SRF1280A-102M
ΔT
@ 25 °C
ΔT
(°C)
40.0
20.0
0.0
0.0
1.13
2.25
3.38
4.50
ΔT
(°C)
40.0
20.0
0.0
0.0
0.28
0.55
0.83
1.10
ΔT
(°C)
60.0
60.0
60.0
40.0
20.0
0.0
0.0
0.20
0.40
0.60
0.80
1.00
IDC (A)
IDC (A)
IDC (A)
Temperature
Rising Area
+4.0 °C / sec. max.
Preheat Area
150~200 °C / 60~120 sec.
Reflow Area
+3.0 °C / sec. max.
Forced Cooling Area
-(1.0~5.0) °C / sec. max.
250
217 °C
Temperature (°C)
200
150
60 ~ 120 sec.
60 ~ 150 sec.
60 sec. max.
Peak Temperature:
245 °C max.
Time Above 245 °C:
30 sec. max.
Time Above 217 °C:
60 ~ 150 sec. max.
100
50
0
50
100
150
200
250
Time (Seconds)
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 disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
3312 - 2 mm SMD Trimming Potentiometer
SRF1280A Series - Dual-Winding Shielded Power Inductors
330
DIA.
(12.99)
2.0
±
0.5
(.079
±
.020)
30.4
(1.197)
13.0 ± 0.5
(.512 ± .020)
DIA.
50.0 -0
(1.97 -0)
21.0
±
0.8
(.827
±
.031)
13.0
DIA.
(.512)
26 +0
(1.024 +0)
END
24.0
(.945)
4.0
(.157)
20.0
(.787)
START
NO COMPONENT
COMPONENTS
NO COMPONENT
200
(7.87)
400
(15.75)
USER DIRECTION OF FEED
QTY: 400 PCS. PER REEL
DIMENSIONS:
MM
(INCHES)
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Tel: +36 88 520 390 • Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
REV. 05/18
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 disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
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statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns
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®
product with other components
the actual performance of the Bourns
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