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Coilcraft CPS
Close up of MSD1278-683ML_
3D Model Datasheet S-Param

MSD1278-683

MSD1278-683MLD

RoHS compliant AEC-Q flag

For more information and specification about the part.

Go to series
Buy Now:
Count Unit price
1 $2.74
250 $1.78
500 $1.08
1000 $0.84
2500 $0.72
5000 $0.65

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
Request a Sample:
Designer's Kit:
Kit Values Price
C400 29 (3 of each) $95.00
C463 41 (3 of each) $160.00

Specifications

Electrical specifications at 25°C.

For Flyback Applications

Part number 1
(Hover for schematics)
Inductance (µH) 2
(Tolerance: ±20%) 		DCR max (Ω) 3 Isolation
Voltage (V) 		Leakage
Inductance (nH) 5 		Turns Ratio
MSD1278-683ML_ 68 0.21 500 880 1 : 1

For SEPIC Applications

Part number 1
(Hover for schematics)
Inductance (µH) 2
(Tolerance: ±20%) 		DCR max (Ω) 3 SRF typ (MHz) 4 Coupling coefficient Leakage
Inductance (nH) 5 		Isat (A) 6 Irms (A)
both windings 7 one winding 8
MSD1278-683ML_ 68 0.21 5.0 0.99 880 4.1 1.4 1.9
Notes
  1. When ordering, please specify termination and packaging codes: e.g. MSD1278-105KLD
  2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms, 0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads are connected in parallel, inductance is the same value. When leads are connected in series, inductance is four times the value.
  3. DCR is for each winding. When leads are connected in parallel, DCR is half the value. When leads are connected in series, DCR is twice the value.
  4. SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value. 5.
  5. Leakage inductance is for L1 and is measured with L2 shorted.
  6. Isat: DC current, at which the inductance drops 30% (typ) from its value without current. It is the sum of the current flowing in both windings.
  7. Irms, both windings: Equal current when applied to each winding simultaneously that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Determine temperature rise.
  8. Irms, one winding: Current when applied to one winding that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Determine temperature rise.

Termination:

  • L = RoHS compliant matte tin over nickel over phos bronze.
  • T = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
  • S = non-RoHS tin-lead (63/37). (Special order, added cost)

Packaging:

  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape (500 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
  • B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +85°C with Irms current
Storage temperature range:
Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Maximum part temperature:
+125°C (ambient + temp rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
See FIT/MTBF Calculations

Performance curves

Inductance vs Current

Inductance vs Current

Inductance vs Frequency

Inductance vs Frequency

Schematics

msd1278schem.gif

Physical characteristics

msd1278_dim.gif

Tape and Reel specification

tapereel_pl-(24).gif

 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_o-(3).gif
500 330 100 13 30,4 24,4 24 16 4 2 8,7 0,5

General specification

Core Material:
Ferrite
Weight:
3.7 – 4.4 g
Packaging:
500/13″ reel; Plastic tape: 24 mm wide, 0.5 mm thick, 16 mm pocket spacing, 8.7 mm pocket depth
Winding to Winding Isolation:
500 Vrms, one minute

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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