Features
n Shielded construction
n Inductance range: 10 to 1000 μH
n Heating current up to 2.1 A
n Dimensions: 7.3 x 7.3 x 4.5 mm
n AEC-Q200 qualified
n RoHS compliant* and halogen free**
Applications
n Automotive systems:
- Driver assistant - Entertainment
- Information - Lighting
n DC/DC converters
n Power supplies
SRR0745A Series - Shielded Power Inductors
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Solder Heat
.............................+250 °C for 10 sec.
Temperature Rise
.......................40 °C typ. at rated
Irms
Inductance drop ...................25 % at Isat
Electrical Specications @ 25 °C General Specications
Core ..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging .................. 1000 pcs. per reel
Materials
Product Dimensions
*RoHS COMPLIANT
& AEC-Q200 QUALIFIED
*RoHS COMPLIANT
AEC APPROVED (Select Models)
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
DIMENSIONS:
MM
(INCHES)
* 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.
Recommended Layout
Bourns
Part Number
Inductance
@ 1 kHz / 1 V
DCR
(W)
Max.
I rms
(A)
I sat
(A)
***K-
Factor
L (µH) Tol. (%)
SRR0745A-100M 10 ±20 0.052 2.1 2.5 112
SRR0745A-120M 12 ±20 0.062 2.0 2.3 98
SRR0745A-150M 15 ±20 0.075 1.9 2.1 88
SRR0745A-180M 18 ±20 0.09 1.8 1.95 83
SRR0745A-220M 22 ±20 0.096 1.65 1.75 72
SRR0745A-270M 27 ±20 0.13 1.45 1.62 66
SRR0745A-330M 33 ±20 0.15 1.35 1.45 59
SRR0745A-390M 39 ±20 0.19 1.17 1.3 55
SRR0745A-470M 47 ±20 0.21 1.05 1.2 50
SRR0745A-560M 56 ±20 0.24 0.95 1.1 47
SRR0745A-680M 68 ±20 0.3 0.86 0.96 41
SRR0745A-820M 82 ±20 0.4 0.78 0.9 38
SRR0745A-101M 100 ±20 0.45 0.7 0.78 34
SRR0745A-121M 120 ±20 0.55 0.6 0.7 32
SRR0745A-151M 150 ±20 0.76 0.48 0.58 29
SRR0745A-181M 180 ±20 0.82 0.46 0.54 26
SRR0745A-221M 220 ±20 0.95 0.42 0.5 23
SRR0745A-271M 270 ±20 1.2 0.38 0.46 22
SRR0745A-331M 330 ±20 1.5 0.34 0.4 20
SRR0745A-391M 390 ±20 1.85 0.32 0.36 18
SRR0745A-471M 470 ±20 2.2 0.29 0.34 16
SRR0745A-561M 560 ±20 2.6 0.26 0.3 15
SRR0745A-681M 680 ±20 2.8 0.24 0.28 13
SRR0745A-821M 820 ±20 3.5 0.22 0.26 12
SRR0745A-102M 1000 ±20 4.1 0.2 0.24 11
7.30 ± 0.2
(.287 ± .008)
7.30 ± 0.2
(.287 ± .008)
4.50 ± 0.2
(.177 ± .008)
4.60
(.181)
TYP.
TYP.
2.00
(.079)
1.50
(.059)
1.50
(.059)
4.80
(.189)
7.30 ± 0.2
(.287 ± .008)
7.30 ± 0.2
(.287 ± .008)
4.50 ± 0.2
(.177 ± .008)
2.40
(.094)
4.60
(.181)
TYP.
TYP.
2.00
(.079)
1.50
(.059)
1.50
(.059)
4.80
(.189)
***K-Factor: To calculate core ux density, Bp-p (gauss) = K x L(µH) x Δ I (peak-to-peak ripple current,
A),
determine core loss from Core Loss vs. Flux Density plot.
Flux Density Bp-p (gauss)
10
100
1000
1
100
800 KHz
500 KHz
300 KHz
200 KHz
100 KHz
50 KHz
100001000
0.1
0.01
10000
Core Loss (mW)
10 KHz
Core Loss vs. Flux Density
