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UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest information.
MVR1251T only
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VRM/ VRD Power Inductors
–
MVR
Document 420-1
Document 420-1 Revised 07/13/11
L2 DCR
SRF3 Height
±20% ±8% typ Isat4 Irms5 max
Part number1 (µH) (mOhm) (MHz) (A) (A) (mm)
Low core loss
MVR1251T-251ML_ 0.25 0.925 160 35 25 5.1
MVR1251T-361ML_ 0.36 0.925 140 24 24 5.1
MVR1251T-561ML_ 0.56 0.925 110 13 25 5.1
Soft saturation
MVR1247C-361ML_ 0.36 0.925 120 36 24 4.7
MVR1255C-651ML_ 0.65 1.50 115 24 19 5.5
MVR1261C-112ML_ 1.10 1.95 95 20 20 6.1
MVR1271C-162ML_ 1.65 2.53 55 17 20 7.1
MVR1278C-232ML_ 2.30 3.08 50 16 17 7.8
1. When ordering, please specify termination and packaging codes:
MVR1278C-232MLC
Termination: L = RoHS compliant tin-silver over copper.
Special order: T = RoHS tin-silver-copper
(95.5/4/0.5) or S = non-RoHS tin-lead (63/37).
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic
tape.
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge),
use code letter C instead.
D = 13″ machine-ready reel. EIA-481 embossed plastic
tape. Factory order only, not stocked.
2. Inductance measured at 500 kHz, 0.1 Vrms, 0 Adc using a Coilcraft
SMD-A fixture in an Agilent/HP 4284A LCR meter or equivalent.
3. SRF measured on an Agilent/HP 8753ES.
4. DC current at which the inductance drops 30% (typ) for MVR12xxC
and 20% (typ) for MVR12xxT from its value without current.
5. Current that causes a 40°C temperature rise from 25°C ambient.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Core material MVRxxxT: Ferrite; MVRxxxxC: Powdered iron
Core and winding loss See www.coilcraft.com/coreloss
Terminations RoHS compliant tin-silver over copper. Other termina-
tions available at additional cost.
Weight MVRT: 2.1 g; MVRC: 2.45 – 3.86 g
Ambient temperature –40°C to +85°C with Irms current, +85°C to
+125°C with derated current
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
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
MVR1247 200/7″ reel; 900/13″ reel
MVR1251 175/7″ reel; 700/13″ reel
MVR1255 175/7″ reel; 700/13″ reel
MVR1261 175/7″ reel; 700/13″ reel
MVR1271 100/7″ reel; 500/13″ reel
MVR1278 100/7″ reel; 500/13″ reel
Plastic tape: 24 mm wide, 16 mm pocket spacing
MVR1247 0.35 mm thick, 4.5 mm pocket depth
MVR1251 0.4 mm thick, 6.1 mm pocket depth
MVR1255 0.4 mm thick, 6.1 mm pocket depth
MVR1261 0.4 mm thick, 6.1 mm pocket depth
MVR1271 0.4 mm thick, 7.5 mm pocket depth
MVR1278 0.4 mm thick, 7.5 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
The MVR series provides greater current handling
capability than any other power inductor its size. While
requiring only one square centimeter of board space, this
inductor can handle up to 36 Amps of current.
These shielded inductors were developed for multi-phase
voltage regulators and are ideal for use in DC-DC con-
verters, battery-powered devices and high current power
supplies. Their flat wire construction ensures very low
DC resistance and offers an excellent performance-to-
height ratio. The materials used in these parts eliminate
all thermal aging issues.
The MVR12xxT is a high efficiency part that features very
low core loss. The MVR12xxC provides soft saturation
and is unaffected by part temperature up to 125°C.
Refer to the comparison curves for L vs Current and ESR
vs Frequency for performance differences.
For free evaluation samples, contact Coilcraft or order
them online at www.coilcraft.com.
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest information.
Document 420-2 Revised 07/13/11
MVR Series – VRM/ VRD Power Inductors
Document 420-2
Current Derating Temperature Rise vs Current
70
80
60
50
40
30
20
10
0
Temperature rise (from 25°C)
Current (A rms)
501520253
035
10
0.36 µH
2.3 µH
MVR12xxT
MVR12xxC
0.25 µH
0.36 µH
0.56 µH
0.65 µH
1.10 µH
1.65 µH
0.1 1
100
10
Current (A)
Inductance (µH)
0.2
0.5
0.4
0.3
0.1
MVR1251T-361
MVR1247C-361
L vs Current Comparison – 0.36 µH
-40 -200 20 40 60 80 100 140120
Ambient temperature (°C)
Percent of rated current
120
110
100
90
80
70
60
50
40
30
20
10
0
Isat
Irms
25°C
MVRT
MVRC
Height (in. / mm) Length (in. / mm)
Body size typ max typ max
MVR1247 0.171 / 4,35 0.185 / 4,70 0.448 / 11,37 0.453 / 11,50
MVR1251 0.181 / 4,61 0.200 / 5,10 0.439 / 11,14 0.453 / 11,50
MVR1255 0.207 / 5,25 0.217 / 5,50 0.448 / 11,37 0.453 / 11,50
MVR1261 0.232 / 5,90 0.240 / 6,10 0.448 / 11,37 0.453 / 11,50
MVR1271 0.262 / 6,65 0.280 / 7,10 0.448 / 11,37 0.453 / 11,50
MVR1278 0.287 / 7,29 0.307 / 7,80 0.448 / 11,37 0.453 / 11,50
0.1
100
101
Equivalent Series Resistance (Ohms)
Frequency (MHz)
10
9
8
7
6
5
4
3
2
1
0
MVR1251T-361
MVR1247C-361
ESR vs Frequency Comparison – 0.36 µH
Dimensions are in inches
mm
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft appr
oval.
Specification subject to change without notice.
Please check web site for latest information.
MVR1251T only
Document 420-3 Revised 07/13/11
MVR Series – VRM/ VRD Power Inductors
MVR12xxT MVR12xxC
L vs Frequency L vs Frequency
0.1 1
100
10
Frequency (MHz)
0
0.5
2.0
3.0
1.5
2.5
1.0
Inductance (µH)
0.36 µH
0.65 µH
1.10 µH
1.65 µH
2.30 µH
10.1
100
10
Frequency (MHz)
Inductance (µH)
0
0.5
2.0
3.0
1.5
2.5
1.0
0.56 µH
0.25 µH
0.36 µH
Inductance vs current is unaffected by part temperature up to 125°C.
L vs Current L vs Current
0.1 1
100
10
Current (A)
Inductance (µH)
0
0.5
2.0
3.0
1.5
2.5
1.0
0.36 µH
0.65 µH
1.10 µH
1.65 µH
2.30 µH
0.1 1
100
10
Current (A)
Inductance (µH)
0
0.5
2.0
3.0
1.5
2.5
1.0
0.25 µH
0.56 µH
0.36 µH
Document 420-3
ESR vs Frequency ESR vs Frequency
0.1
100
101
Equivalent Series Resistance (Ohms)
Frequency (MHz)
10
9
8
7
6
5
4
3
2
1
0
0.36 µH
0.25 µH
0.56 µH
0.1
100
101
Equivalent Series Resistance (Ohms)
Frequency (MHz)
10
9
8
7
6
5
4
3
2
1
0
1.10 µH
0.65 µH
2.30 µH
1.65 µH
0.36 µH
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Coilcraft:
MVR1271C-162MLB MVR1251T-561MLB MVR1247C-361MLC MVR1251T-251MLC MVR1255C-651MLB
MVR1251T-361MLB MVR1247C-361MLB MVR1261C-112MLC MVR1251T-361MLC MVR1261C-112MLB
MVR1278C-232MLB MVR1255C-651MLC MVR1278C-232MLC MVR1251T-251MLB MVR1251T-561MLC
MVR1271C-162MLC
