SRN1060, SRN3010, SRN4018, SRN5020

Bourns Releases New Semi-Shielded Power Inductor
Models SRN3010, SRN4018, SRN5020 and SRN1060
Riverside, California - REV. December 13, 2012 - Bourns Inductive Components Product Line introduces four
additional models designed using semi-magnetic shielding technology. Bourns now has a total of seven SRN
models with selections of 3x3 mm to 10x10 mm footprints, 1 mm to 6 mm heights and 0.5 µH to 470 µH
inductance. Instead of a conventional ferrite shield, the magnetic shield of the SRN series utilizes an epoxy-ferrite
powder mixture resin. This compound is applied to the perimeter of the inductor which completely envelops the
winding. As a result, the SRN model series inductors provide effective magnetic shielding while emitting lower
radiation compared to non-shielded inductors. In addition, the models offer a reduced footprint and cost savings
to comparably-sized conventional ferrite shield inductors.
The semi-shielded SRN model series inductors combine the features of non-shielded and shielded inductors,
making them ideal for use in DC/DC converters which provide power management to mobile electronic devices,
computers, data storages and consumer electronics. The SRN series is also well-suited for industrial applications
such as LED lighting, control circuits and GPS.
Inductance Range
3 x 3 mm
4 x 4 mm
5 x 5 mm
10 x 10 mm
1 mm
1.8 mm
2 mm
6 mm
1 – 47 µH
0.82 – 220 µH
1 – 33 µH
10 – 470 µH
Current Range
0.35 - 2.3 A
0.28 - 4 A
0.9 - 3.6 A
0.8 - 5.4 A
Current Range
0.28 - 2.3 A
0.3 - 4.2 A
0.8 - 4 A
0.8 - 5.2 A
Other existing SRN models are SRN3015, SRN6045 and SRN8040.
Minimum order quantities are 2000 pcs./reel for the SRN3015 and SRN5020, 3000 pcs./reel for the SRN4018
and 650 pcs./reel for the SRN1060 through Bourns authorized distributors. Samples are available upon request.
Please visit Bourns website at for additional product details.
Semi-shielded construction
High inductance
Inductance range: 0.82 to 470 µH
High rated current - up to 5.4 A
RoHS compliant* and halogen free**
DC/DC converters
Notebook computers
Digital video cameras
Televisions, LCD displays
* 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.