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© Coilcraft Inc. 2013

This product may not be used in medical or high

risk applications without prior Coilcraft approval.

Specification subject to change without notice.

Please check web site for latest information.

MVR1251T only

VRM/ VRD Power Inductors – MVR

Document 420-1

Document 420-1 Revised 07/13/11

DCR

Height

±20% ±8%

(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 with pure water or alcohol only. For other

solvents, 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.