Features
n Shielded construction
n Metal alloy powder core
n High saturation current
n Low buzz noise
n Inductance range: 0.47 to 47 H
n RoHS compliant* and halogen free**
SRP1770C Series - Shielded Power Inductors
Electrical Specifications @ 25 C General Specifications
Operating Temperature
Inductance
@ 100 kHz ................................-40 C to +125 C
Irms
/ 1 V Isat
Q (Min.) SRF DCR DCR
(Temperature rise included)
(A) (A)
Bourns Tol. @100 kHz (MHz) (mW) (mW) Terminal
Storage Temperature (Component)
Part Number L (H) (%) / 1 V Typ. Typ. Max. Typ. Typ. Type
................................-40 C to +125 C
SRP1770C-R47M 0.47 20 10 28 0.75 0.83 60.0 115
Rated Current
SRP1770C-1R0M 1.0 20 20 24 1.30 1.50 48.0 68
............ Inductance drops 30 % at Isat
Temperature Rise .....40 C at rated Irms
SRP1770C-1R5M 1.5 20 20 22 1.80 2.10 42.0 55
Moisture Sensitivity Level .....................1
SRP1770C-2R2M 2.2 20 20 21 2.50 2.80 40.0 45
ESD Classification (HBM) .................N/A
SRP1770C-3R3M 3.3 20 20 19 3.50 3.90 28.0 40
SRP1770C-4R7M 4.7 20 20 17 4.80 5.50 26.0 37
1
Circuit design, component, PCB trace
SRP1770C-5R6M 5.6 20 20 15 5.90 6.80 24.0 35
Lead
size and thickness, airflow and other
Frame
SRP1770C-6R8M 6.8 20 20 14 8.40 9.20 22.0 30
cooling provisions all affect the part
SRP1770C-8R2M 8.2 20 20 13 9.60 10.80 18.0 28 temperature. Part temperature should be
verified in the end application.
SRP1770C-100M 10.0 20 20 12 11.60 13.00 17.0 25
SRP1770C-150M 15.0 20 20 10 16.50 19.50 14.0 23
Materials
SRP1770C-220M 22.0 20 20 8 24.00 27.60 12.0 19
SRP1770C-330M 33.0 20 20 6 36.00 42.00 10.7 15 Core ..........................Metal alloy powder
Wire ............................Enameled copper
SRP1770C-470M 47.0 20 20 7 46.00 53.00 8.7 13
Terminal Finish .............................. Sn/Ni
Peak Temperature260 max.
Packaging ....... 200 pcs. per 13-inch reel
Max. Peak Temperature 260 10 sec. max.
Soldering Profile
Max. Time Above 217 : 60~150 sec. max.
Product Dimensions
Preheating Soldering Natural Cooling
17.8 0.50
T (260 C / 10 Sec. Max.)
P
(.701 .020)
t (245 C, 20~40 Sec.)
16.9 0.30
p
(.665 .012)
217 C
200 C
60~150 Sec.
150C
100
1907H
60~180
Sec.
16.9 0.30 6.7 0.30
480 Sec. Max.
(.665 .012) (.264 .012)
25
Time (Seconds)
2.3 0.30
(.091 .012)
Reflow Times: 3 Times Max.
DIMENSIONS:
How to Order Recommended Layout
MM
18.5
SRP1770C - 220M (INCHES)
(.728)
Model
Value Code (see table) 12.5
11.9 0.30
2.5 0.30
(.492) (.469 .012)
(.098 .012)
11.0
Schematic
(.433)
MM
DIMENSIONS:
(INCHES)
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
**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)1500 content ppm isor less.
Specifications are subject to change without notice. Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
220
1906H
Temperature (C) SRP1770C Series - Shielded Power Inductors
L vs. I Charts
SRP1770C-R47M SRP1770C-1R0M SRP1077C-1R5M
0.70 120 1.5 80 2.20 80
0.56 96 1.2 64 1.76 64
0.42 72 0.9 48 1.32 48
0.28 48 0.6 32 0.88 32
0.14 24 0.3 16 0.44 16
0 0 0 0 0 0
0 24 48 72 96 120 0 14 28 42 56 70 0 12 24 36 48 60
DC Current (A) DC Current (A) DC Current (A)
SRP1770C-2R2M SRP1770C-3R3M SRP1770C-4R7M
3.0 60 4.5 90 7.0 90
2.4 48 3.6 72 5.6 72
1.8 36 2.7 54 4.2 54
1.2 24 1.8 36 2.8 36
0.6 12 0.9 18 1.4 18
0 0 0 0 0 0
0 10 20 30 40 50 0 8 16 24 32 40 0 8 16 24 32 40
DC Current (A) DC Current (A) DC Current (A)
SRP1770C-5R6M SRP1770C-6R8M SRP1770C-8R2M
8.0 90 10 80 12.0 90
6.4 72 8 64 9.6 72
4.8 54 6 48 7.2 54
3.2 36 4 32 4.8 36
1.6 18 2 16 2.4 18
0 0 0 0 0 0
0 8 16 24 32 40 0 6 12 18 24 30 0 6 12 18 24 30
DC Current (A) DC Current (A) DC Current (A)
SRP1770C-100M SRP1770C-150M SRP1770C-220M
15 90 22.0 150 30 90
12 72 17.6 120 24 72
9 54 13.2 90 18 54
6 36 8.8 60 12 36
3 18 4.4 30 6 18
0 0 0 0 0 0
0 6 12 18 24 30 0 6 12 18 24 30 0 4 8 12 16 20
DC Current (A) DC Current (A) DC Current (A)
SRP1770C-330M SRP1770C-470M
50 90 70 100
40 72 56 80
30 54 42 60
20 36 28 40
10 18 14 20
0 0 0 0
Specifications are subject to change without notice.
0 3 6 9 12 15 0 3 6 9 12 15
Users should verify actual device performance in their specific applications.
DC Current (A) DC Current (A)
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
Inductance (H) Inductance (H) Inductance (H) Inductance (H) Inductance (H)
Temperature Rise (C) Temperature Rise (C) Temperature Rise (C) Temperature Rise (C) Temperature Rise (C)
Inductance (H) Inductance (H) Inductance (H) Inductance (H) Inductance (H)
Temperature Rise (C) Temperature Rise (C) Temperature Rise (C) Temperature Rise (C) Temperature Rise (C)
Inductance (H) Inductance (H) Inductance (H) Inductance (H)
Temperature Rise (C) Temperature Rise (C) Temperature Rise (C) Temperature Rise (C)