© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Document 703-1
Document 703-1
Revised 08/28/09
Coupled Inductors –MSD1260T
Dimensions are in
inches
mm
The MSD1260T series of shielded coupled inductors
was designed specifically for high temperature applica-
tions – up to 125°C. The excellent coupling coefficient
(k
≥ 0.94) makes it ideal for use in SEPIC applications.
In SEPIC topologies, the required inductance for each
winding in a coupled inductor is half the value needed
for two separate inductors, allowing selection of a part
with lower DCR and higher current handling.
These parts provide high inductance, high efficiency and
excellent current handling in a rugged, low cost part.
They are well suited for use as VRM inductors in high-
current DC-DC and VRM/VRD controllers.
They can also be used as two single inductors con-
nected in series or parallel, or as 1 : 1 transformers.
Core material Ferrite
Terminations RoHS compliant matte tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight: 2.8 – 3.2 g
Ambient temperature –40°C to +125°C with
Irms current, +125°C
to +165°C with derated current
Storage temperature Component: –40°C to +165°C.
Packaging: –40°C to +80°C
Winding to winding isolation 500 Vrms
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 500/13
″ reel; Plastic tape: 24 mm wide, 0.35 mm thick,
16 mm pocket spacing, 6.6 mm pocket depth
PCB washing Only pure water or alcohol recommended
For high temperature
applications
L1
L2
Q1
C1
C2
+
++
––
D1
VOUT
VIN
Load
Typical SEPIC schematic
Refer to Application Note, Document 639,
“Selecting Coupled Inductors for SEPIC Applications”
Recommended
Land Pattern
0.217
5,5
0.177
4,5
0.157
4,0
0.079
2,0
1
4
2
3
3
1
2
4
L1
L2
123
X
0.197
5,0
0.059
1,5
0.197
5,0
0.138
3,5
0.484
12,3
max
0.484
12,3
max
Dash number
Internal code
1
4
2
3
0.236 ±0.008
6,0 ±0,2
Dot indicates pin1
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