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SK Toroidal Series

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  • Reliable quality by fully controlled production process from material.
  • Small, low price and quick delivery
  • Excellent noise absorption
  • Usable at large current, maintaining high saturation flux density
  • Toroidal shape with little buzz and little magnetic flux leakage
  • Good linearity of temperature characteristics
  • Suitable choke coils to prevent SMPS noise.

Size and part no. designations

Standard specifications

Standard specifications

Name Rated current
(A)
Inductance
(μH)
DCR
(mΩ)
Dimensions(mm) Wire diameter
(mm)
Data
PDF
D max. W max. Lead length
SK-03M-2W 1 10 45 9 6 20 0.40 PDF
SK-05M-3W 2 25 42 13 9 20 0.55
SK-05M-4W 2 48 58 13 9 20 0.55
SK-08MS-3Y 2 26 45 17 9 20 0.60
SK-08MS-4Y 2 46 70 17 9 20 0.60
SK-08MS-5Y 2 72 90 17 9 20 0.60
SK-08MD-3Y 2 45 55 17 12 20 0.60
SK-08MD-4Y 2 80 80 17 12 20 0.60
SK-08MD-5Y 2 125 95 17 12 20 0.60
SK-08ML-52W 2 200 150 20 15 20 0.60
SK-08ML-
73WRPS(055)
1 400 210 19 14 10 0.55
SK-10M-3Y 3 40 35 22 12 20 0.80
SK-10M-4Y 3 72 45 22 12 20 0.80
SK-10M-5Y 3 110 55 22 12 20 0.80
SK-12M-3Y 5 36 30 26 13 20 1.00
SK-12M-4Y 5 64 35 26 13 20 1.00
SK-12M-5Y 5 100 40 26 13 20 1.00

About custom made

We can also accept custom-make coils to better suit your needs with standard core and base.
For more information, please ask us via inquiry button in this page

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SK Pot Series

Inquiries
  • Better DC bias characteristics than conventional toroidal type
  • High inductance choke coils are available at each wire diameter
  • High Curie temperature with little temperature-inductance variation
  • Little temperature rise
  • Little flux leakage and no directivity by closed magnetic circuit structure
  • Good mountability on print circuit board (PCB)

Size and part no. designations

Standard specifications

Unit / mm

Type A B C D E F G
Outer diameter max. Height max. Lead length
±2
Length of auxiliary pin
±1
Lead wire interval
Typical
Diameter of auxiliary pin
±0.2
Auxiliary pin interval
±0.2
13P 14.5 16.5 10.0 4.0 5.6 0.8 2.8
15P 16.5 18.0 7.0 4.0 8.0 0.8 4.0
17P 18.5 20.0 7.0 4.0 8.4 0.8 4.2
21P 22.5 22.0 7.0 4.0 9.0 1.0 4.5
24P 25.0 23.5 7.0 4.0 11.4 1.0 5.7
H : Lead wire diameter (same as F)
a,b : Lead wire (soldered)
c,d,e : Auxiliary pin (TCP wire) / S Type: d / W Type: c&e
f : Base plate (PBT 94 V-0)

Auxiliary pin(s) are not insulated for core.

Specification of standard coil

Type Name Rated current(A) Inductanc
(μH)
DCR
(mΩ)
max.
Wire diameter
(mmφ)
Data
PDF
Idc=0
min.
Rated
typ.
13P 13BS035300F 1.3 300 280 400 0.35 PDF
13BS045100F 2.1 100 90 150 0.45
15P 15BW035600F 1.0 600 510 500 0.35
15BW045300F 1.6 300 220 250 0.45
15BW060072F 3.5 72 55 60 0.60
17P 17BW045620F 1.5 620 470 370 0.45
17BS055190 2.9 190 140 120 0.55
17BS070110F 3.9 110 90 60 0.70
21P 21BS060550F 2.2 550 400 220 0.60
21BS080140 4.4 140 95 60 0.80
24P 24BS080190F 4.4 190 130 70 0.80
24BS100120F 6.0 120 80 40 1.00
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