Features
n Semi-shielded construction
n Miniature size
n Low profile - 1.8 mm max.
n Inductance range: 0.82 to 220 µH
n High rated current - up to 4.0 A
n RoHS compliant* and halogen free**
Applications
n DC/DC converters
n Notebook computers
n Digital video cameras
n HDDs
n Cell phones
n Televisions, LCD displays
SRN4018 Series - Semi-shielded Power Inductors
* 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.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
Operating Temperature
................................. -25 °C to +120 °C
(Temperature rise included)
Storage Temperature .. -25 °C to +120 °C
Resistance to Solder Heat
...............................+260 °C for 10 sec.
Temperature Rise .....40 °C at rated Irms
Rated Current
............ Inductance drops 30 % at Isat
Electrical Specications @ 25 °C
Bourns Part No.
Inductance
@ 100 KHz/1 V
Q
(Ref.)
Test
Freq.
(MHz)
SRF
(MHz)
Typ.
DCR
(W)
Max.
Irms
(A)
Isat
(A)L (mH) Tol. %
SRN4018-R82Y 0.82 30 9 7.96 100 0.019 4.0 4.7
SRN4018-1R0Y 1.0 30 9 7.96 90 0.023 3.7 4.2
SRN4018-1R2Y 1.2 30 9 7.96 80 0.025 3.5 4.0
SRN4018-1R5Y 1.5 30 9 7.96 70 0.032 3.1 3.5
SRN4018-2R2M 2.2 20 9 7.96 60 0.044 2.9 3.0
SRN4018-2R7M 2.7 20 9 7.96 52 0.052 2.3 2.4
SRN4018-3R3M 3.3 20 9 7.96 45 0.066 2.2 2.3
SRN4018-4R7M 4.7 20 9 7.96 35 0.084 1.9 2.0
SRN4018-6R8M 6.8 20 9 7.96 30 0.118 1.5 1.6
SRN4018-100M 10 20 11 2.52 25 0.180 1.3 1.4
SRN4018-150M 15 20 11 2.52 18 0.264 1.0 1.1
SRN4018-220M 22 20 11 2.52 15 0.348 0.9 0.95
SRN4018-330M 33 20 11 2.52 12 0.552 0.7 0.75
SRN4018-470M 47 20 11 2.52 10 0.780 0.6 0.62
SRN4018-680M 68 20 11 2.52 8 1.128 0.5 0.50
SRN4018-101M 100 20 23 0.796 6 1.596 0.42 0.45
SRN4018-151M 150 20 23 0.796 5 2.400 0.32 0.35
SRN4018-221M 220 20 30 0.796 3 3.552 0.28 0.30
SRN4018-331M 330 20 30 0.796 6 6.36 0.2 0.21
General Specications
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Coating .................Magnetic epoxy resin
Packaging ..... 3000 pcs. per 13-inch reel
Materials
Product Dimensions
Recommended Layout
Electrical Schematic
DIMENSIONS:
MM
(INCHES)
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
How to Order
SRN4018 - 100M
Model
Value Code (see table)
Soldering Prole
Temperature (°C)
150
260
200
20 sec.max.
Preheat 100 sec. max. 10 sec. max.
Natural Cooling
60 sec. min.
4.0 ± 0.2
(.157 ± .008)
4.0 ± 0.2
(.157 ± .008)
MAX.
1.8
(.071)
4.55
(.179)
1.5
(.059)
1.5
(.059)
4.0 ± 0.2
(.157 ± .008)
4.0 ± 0.2
(.157 ± .008)
3.6
(.142)
4.55
(.179)
1.5
(.059)
1.5
(.059)
