Features
■ Semi-shielded construction
■ Inductance range: 1.5 to 47 µH
■ Rated current up to 3.6 A
■ RoHS compliant* and halogen free**
Applications
■ DC/DC converters
■ Notebook computers
■ Digital video cameras
■ HDDs
■ Cellphones
■ Televisions, LCD displays
SRN5040 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.
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 specifi c applications.
Operating Temperature
................................. -40 °C to +125 °C
(Temperature rise included)
Storage Temperature .... -10 °C to +40 °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
Q
(Ref.)
Test
Freq.
(MHz)
SRF
(MHz)
Typ.
DCR
(Ω)
Max.
Irms
(A)
Isat
(A)L (μH) Tol. %
SRN5040-1R5Y 1.5 30 15 7.96 66 0.018 3.6 6.0
SRN5040-2R2Y 2.2 30 20 7.96 40 0.021 3.5 4.6
SRN5040-3R3M 3.3 20 20 7.96 30 0.027 3.3 3.8
SRN5040-4R7M 4.7 20 15 7.96 27 0.035 3.1 3.3
SRN5040-6R8M 6.8 20 15 7.96 21 0.059 2.3 2.6
SRN5040-8R2M 8.2 20 15 7.96 18 0.065 2.2 2.4
SRN5040-100M 10 20 17 7.96 17 0.068 2.1 2.3
SRN5040-150M 15 20 17 2.52 15 0.096 1.8 2.0
SRN5040-220M 22 20 17 2.52 11 0.152 1.4 1.6
SRN5040-270M 27 20 17 2.52 9 0.198 1.3 1.4
SRN5040-330M 33 20 17 2.52 8 0.216 1.2 1.3
SRN5040-470M 47 20 15 2.52 7 0.324 0.9 1.1
General Specifi cations
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Coating .................Magnetic epoxy resin
Packaging ..... 1000 pcs. per 13-inch reel
Materials
Product Dimensions
Recommended Layout
Electrical Schematic
DIMENSIONS:
MM
(INCHES)
*RoHS COMPLIANT
How to Order
SRN5040 - 4R7M
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.
MAX.
4.0
(.157)
4.0
(.157)
1.5
(.059)
1.5
(.059)
5.1
(.200)
5.0 ± 0.2
(.197 ± .008)
5.0 ± 0.2
(.197 ± .008)
2R2
