Datasheet
Features
■ Semi-shielded construction
■ Miniature size
■ Low profi le - 1.8 mm max.
■ Inductance range: 0.82 to 220 µH
■ High rated current - up to 4.0 A
■ RoHS compliant* and halogen free**
Applications
■ DC/DC converters
■ Notebook computers
■ Digital video cameras
■ HDDs
■ Cell phones
■ 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 defi nition 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.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c 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 Specifi cations @ 25 °C
Bourns Part No.
Inductance
@ 100 KHz/1 V
DCR
(Ω)
Max.
Irms
(A)
Isat
(A)L (μH) Tol. %
SRN4018-R82Y 0.82 30 0.019 4.0 4.7
SRN4018-1R0Y 1.0 30 0.023 3.7 4.2
SRN4018-1R2Y 1.2 30 0.025 3.5 4.0
SRN4018-1R5Y 1.5 30 0.032 3.1 3.5
SRN4018-2R2M 2.2 20 0.044 2.9 3.0
SRN4018-2R7M 2.7 20 0.052 2.3 2.4
SRN4018-3R3M 3.3 20 0.066 2.2 2.3
SRN4018-4R7M 4.7 20 0.084 1.9 2.0
SRN4018-6R8M 6.8 20 0.118 1.5 1.6
SRN4018-100M 10 20 0.180 1.3 1.4
SRN4018-150M 15 20 0.264 1.0 1.1
SRN4018-220M 22 20 0.348 0.9 0.95
SRN4018-330M 33 20 0.552 0.7 0.75
SRN4018-470M 47 20 0.780 0.6 0.62
SRN4018-680M 68 20 1.128 0.5 0.50
SRN4018-101M 100 20 1.596 0.42 0.45
SRN4018-151M 150 20 2.400 0.32 0.35
SRN4018-221M 220 20 3.552 0.28 0.30
General Specifi cations
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
How to Order
SRN4018 - 100M
Model
Value Code (see table)
Soldering Profi le
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)
3.6
(.142)
4.55
(.179)
1.5
(.059)
1.5
(.059)