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MSC1278-103

RoHS compliant

For more information and specification about the part.

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Count Unit price
1 $1.50
250 $1.15
500 $0.99
1000 $0.83
2500 $0.74
5000 $0.67

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

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Specifications

Electrical specifications at 25°C.

For Flyback Applications

Part number 1 Inductance (µH) 2
(Tolerance: ±20%)
DCR max (Ω) 3 Isolation
Voltage (V)
Leakage
Inductance (µH) 5
Turns Ratio
MSC1278-103ML_ 10 0.058 500 2.8 1 : 1

For SEPIC Applications

Part number 1 Inductance (µH) 2
(Tolerance: ±20%)
DCR max (Ω) 3 SRF typ (MHz) 4 Coupling coefficient Leakage
Inductance (µH) 5
Isat (A) 6 Irms (A)
10% drop 20% drop 30% drop both windings 7 one winding 8
MSC1278-103ML_ 10 0.058 20.0 0.8 2.8 8.8 10.0 10.7 2.6 3.6
Notes
  1. When ordering, please specify termination and packaging codes: e.g. MSC1278-105KLD
  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. DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  4. SRF measured using an Agilent/HP 4191A or equivalent. When leads are connected in parallel, SRF is the same value. Details
  5. Leakage Inductance is for L1 and is measured with L2 shorted.
  6. Isat: DC current, at which the inductance drops the specified amount from its value without current. It is the sum of the current flowing in both windings. Details
  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:

  • 13" reel, machine-ready 
    EIA-481 embossed plastic tape (500 parts per full reel).
  • B = Less than full reel
    In tape, not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead.
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +85°C with Irms current, +85°C to +125°C with derated 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 + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Performance curves

Inductance vs. Current

Inductance vs. Frequency

Schematics

msc1278s.gifmsd1260s.gif

Physical characteristics

msc1278d.gif
dims_inches_mm.gif

Tape and Reel specification

tapereel_pl-(16).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.gif
500 330 100 13 30,4 24,4 24 16 4 2 8,1 0,4

General specification

Core Material:
Ferrite
Weight:
3.7 - 4.4 g
Packaging:
500/13″ reel; Plastic tape: 24 mm wide, 0.4 mm thick, 16 mm pocket spacing, 8.1 mm pocket depth

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 with pure water or alcohol only. More info.

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