Features
■ Shielded construction
■ Inductance range: 1 to 47 µH
■ Heating current up to 5.1 A
■ AEC-Q200 qualified
■ RoHS compliant* and halogen free**
SRR4818A Series - Shielded Power Inductors
Operating Temp. ......... -40 °C to +150 °C
(Temperature rise included)
Storage Temperature .. -40 °C to +150 °C
Temperature Rise
..................... 20 °C typ. at rated Irms1
40 °C typ. at rated Irms2
Rated Current
............ Inductance drops 35 % at Isat
Moisture Sensitivity Level .....................1
.................N/A
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging ......... 800 pcs. per 7-inch reel
Materials
Product Dimensions
DIMENSIONS: MM
(INCHES)
Bourns
Part Number
Inductance @
100 kHz/0.1 V SRF
(MHz)
Typ.
DCR (mΩ)I rms1
(A)
Typ.
I rms2
(A)
Typ.
I sat
(A)
Typ.
L (μH) Tol. (%) Typ. Max.
SRR4818A-1R0Y 1.0 ± 30 140 19.2 25.0 4.00 5.10 3.60
SRR4818A-1R5Y 1.5 ± 30 105 25.2 35.0 3.75 4.70 3.00
SRR4818A-2R2Y 2.2 ± 30 90 33.7 45.0 2.70 3.50 2.43
SRR4818A-3R3Y 3.3 ± 30 70 42.8 55.0 2.50 3.10 2.10
SRR4818A-3R9Y 3.9 ± 30 65 54.5 70.0 2.20 2.70 1.90
SRR4818A-4R7Y 4.7 ± 30 55 59.4 80.0 2.00 2.60 1.50
SRR4818A-5R6Y 5.6 ± 30 50 74.3 90.0 1.75 2.30 1.35
SRR4818A-6R8Y 6.8 ± 30 45 82.1 100.0 1.65 2.20 1.25
SRR4818A-8R2Y 8.2 ± 30 43 97.7 130.0 1.55 1.90 1.15
SRR4818A-100M 10 ± 20 40 109.8 140.0 1.45 1.80 1.05
SRR4818A-120M 12 ± 20 37 132.2 170.0 1.30 1.60 0.95
SRR4818A-150M 15 ± 20 30 176.7 220.0 1.25 1.50 0.87
SRR4818A-180M 18 ± 20 28 214.8 280.0 1.10 1.40 0.79
SRR4818A-220M 22 ± 20 25 280.3 360.0 1.00 1.25 0.72
SRR4818A-270M 27 ± 20 22 317.6 400.0 0.90 1.15 0.63
SRR4818A-330M 33 ± 20 20 399.1 500.0 0.70 0.90 0.56
SRR4818A-390M 39 ± 20 17 439.3 540.0 0.63 0.80 0.53
SRR4818A-470M 47 ± 20 16 504.1 630.0 0.60 0.75 0.47
*RoHS COMPLIANT
& AEC APPROVED
Recommended Layout
Electrical Schematic
How to Order
SRR4818A - 1R0Y
Model
Value Code (see table)
4.80 ± 0.20
(.189 ± .008)
4.80 ± 0.20
(.189 ± .008)
1.80 ± 0.20
(.071 ± .008)
1.60 ± 0.20
(.063 ± .008)
1.60 ± 0.20
(.063 ± .008)
1.60 ± 0.20
(.063 ± .008)
MARKED LINE
INDICATES
WINDING
STARTING
TERMINAL
4.20
(.165)
1.17
(.046)
1.98
(.078)
1.98
(.078)
DIMENSIONS: MM
(INCHES)
* RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** 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
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
SRF0504 Series - Line Filter
Inductance vs. IDC
SRR4818A Series - Shielded Power Inductors
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
01234
SRR4818A-1R0Y
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.5 1.0 1.5 2.0 2.5 3.0
SRR4818A-1R5Y
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.6 1.2 1.8 2.4
SRR4818A-2R2Y
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.325 0.650 0.975 1.300
SRR4818A-8R2Y
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.2 0.4 0.6 0.8 1.0 1.2
SRR4818A-100M
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.2 0.4 0.6 0.8 1.0
SRR4818A-120M
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.2 0.4 0.6 0.8 1.0
SRR4818A-150M
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.6 1.2 1.8 2.4
SRR4818A-3R3Y
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.6 1.2 1.8 2.4
SRR4818A-3R9Y
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.34 0.68 1.02 1.36 1.70
SRR4818A-4R7Y
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.3 0.6 0.9 1.2 1.5
SRR4818A-5R6Y
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.325 0.650 0.975 1.300
SRR4818A-6R8Y
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and in this document are subject to specific legal disclaimers set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SRF0504 Series - Line Filter
Inductance vs. IDC (Continued)
SRR4818A Series - Shielded Power Inductors
Temperature vs. IDC
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
57.009.006.054.003.051.00
SRR4818A-180M
IDC (A)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.2 0.4 0.6 0.8
SRR4818A-220M
IDC
(
A
)
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.1 0.2 0.3 0.4 0.5 0.6
SRR4818A-330M
IDC
(
A
)
60%
80%
100%
120%
0%
20%
40%
0 0.1 0.2 0.3 0.4 0.5 0.6
SRR4818A-390M
IDC (A)
60%
80%
100%
120%
0%
20%
40%
0 0.1 0.2 0.3 0.4 0.5 0.6
SRR4818A-470M
IDC (A)
L/LOA
L/LOA
L/LOA
60%
80%
100%
120%
0%
20%
40%
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
SRR4818A-270M
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0123456
SRR4818A-1R0Y
IDC (A)
ΔT (°C)
30
40
0
10
20
012345
SRR4818A-1R5Y
IDC (A)
ΔT (°C)
24
32
40
0
8
16
0 0.7 1.4 2.1 2.8 3.5
SRR4818A-2R2Y
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.7 1.4 2.1 2.8 3.5
SRR4818A-3R3Y
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.5 1.0 1.5 2.0 2.5 3.0
SRR4818A-3R9Y
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.5 1.0 1.5 2.0 2.5 3.0
SRR4818A-4R7Y
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and in this document are subject to specific legal disclaimers set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SRF0504 Series - Line Filter
Temperature vs. IDC (Continued)
SRR4818A Series - Shielded Power Inductors
()
IDC (A)
ΔT (°C)
36
48
60
0
12
24
0 0.5 1.0 1.5 2.0 2.5 3.0
SRR4818A-5R6Y
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.6 1.2 1.8 2.4
SRR4818A-6R8Y
IDC (A)
ΔT (°C)
24
32
40
0
8
16
0 0.5 1.0 1.5 2.0
SRR4818A-8R2Y
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.4 0.8 1.2 1.6 2.0
SRR4818A-100M
IDC (A)
ΔT (°C)
36
48
60
0
12
24
0 0.4 0.8 1.2 1.6 2.0
SRR4818A-120M
IDC (A)
ΔT (°C)
24
32
40
0
8
16
0 0.3 0.6 0.9 1.2 1.5 1.8
SRR4818A-150M
IDC (A)
ΔT (°C)
36
48
60
0
12
24
0 0.3 0.6 0.9 1.2 1.5 1.8
SRR4818A-180M
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.3 0.6 0.9 1.2 1.5
SRR4818A-220M
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.2 0.4 0.6 0.8 1.0
SRR4818A-330M
IDC (A)
ΔT (°C)
36
48
60
0
12
24
0 0.2 0.4 0.6 0.8 1.0
SRR4818A-390M
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.15 0.30 0.45 0.60 0.75 0.90
SRR4818A-470M
IDC (A)
ΔT (°C)
30
40
50
0
10
20
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
SRR4818A-270M
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and in this document are subject to specific legal disclaimers set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
QTY: 800 PCS. PER REEL
DIMENSIONS: MM
(INCHES)
14.0 +0
(.551 +0)
16.5
(.650)
2.0 ± 0.5
(.079 ± .020)
50.0 -0
(1.969 - 0)
178
(7.001)DIA.
DIA.
13.0
(.512)
13.0
(.512)
DIA.
21.0 ± 0.8
(.827 ± .031)
12.0
(.472)
Components
200 m/m min.
Leader
no component
Trailer
400 m/m min.
no component
START
END
2.0
(.079)
8.0
(.315)
100 100 100 100
USER DIRECTION OF FEED
SRF0504 Series - Line Filter
SRR4818A Series - Shielded Power Inductors
REV. 08/17
200
250
150
200
100
50
0
Temperature (°C)
10050 150
Time (Seconds)
+4.0 °C/Sec. Max. 150~200 °C / 60~120 Sec. +3.0 °C/Sec. Max. -(1.0~5.0) °C/Sec. Max.
Temperature
Rising Area
Preheat
Area
Reflow
Area
Forced
Cooling Area
250
Peak Temperature: 260 °C
217 °C
60~120 Sec.
60 Sec.
Max.
60~150 Sec.
Max. Peak Temperature -5 30 sec. max.
Max. Time Above 217 : 60~150 sec. max.
Peak Temperature 260 max.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and in this document are subject to specific legal disclaimers set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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