Ferrite Cores

Manufacturer Series Packaging Part Status Core Type Supplier Device Package Diameter Inductance Factor (Al) Tolerance Material Gap Effective Permeability (µe) Initial Permeability (µi) Core Factor (ΣI/A) mm⁻¹ Effective Length (le) mm Finish Effective Area (Ae) mm² Effective Magnetic Volume (Ve) mm³ Minimum Core Cross Section (Amin) mm² Height Length 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Photo Mfr. Part # Availability Price Quantity Datasheet Series Packaging Part Status Core Type Supplier Device Package Diameter Inductance Factor (Al) Tolerance Material Gap Effective Permeability (µe) Initial Permeability (µi) Core Factor (ΣI/A) mm⁻¹ Effective Length (le) mm Finish Effective Area (Ae) mm² Effective Magnetic Volume (Ve) mm³ Minimum Core Cross Section (Amin) mm² Height Length Width
B65813J0250A041

B65813J0250A041

FERRITE CORE RM 250NH N41 2PCS

EPCOS - TDK Electronics

506
B65813J0250A041

Datasheet

RM10 Box Active RM RM 10 - 250 nH ±3% N41 Gapped 89.0 2800 0.45 44.0 Uncoated 98.0 4310.0 90.0 0.368" (9.35mm) 1.122" (28.50mm) 0.531" (13.50mm)
ETD54/28/19-3C97

ETD54/28/19-3C97

FERRITE CORE ETD 3C97

Ferroxcube

294
ETD54/28/19-3C97

Datasheet

- Bulk Active ETD ETD 54 x 28 x 19 - - - 3C97 - - - - - Uncoated - - - 1.087" (27.60mm) 2.156" (54.50mm) 0.744" (18.90mm)
B65531D0040A001

B65531D0040A001

FERRITE CORE P 40NH K1 2PCS

EPCOS - TDK Electronics

1,570
B65531D0040A001

Datasheet

P11/7 Box Active P (Pot Core) P 11 x 7 0.445" (11.30mm) 40 nH ±3% K1 Gapped 32.0 80 1.0 15.9 Uncoated 15.9 253.0 - 0.130" (3.30mm) - -
B64290L0616X038

B64290L0616X038

FERRITE CORE TOROID 21.3UH T38

EPCOS - TDK Electronics

631
B64290L0616X038

Datasheet

TX25.3/14.8/20 Box Active Toroid - 1.047" (26.60mm) 21.3 µH ±30% T38 Ungapped - 10000 0.59 60.07 Epoxy 102.5 6157.0 - 0.839" (21.30mm) - -
B65813J0000R049

B65813J0000R049

FERRITE CORE RM 2.9UH N49 2PCS

EPCOS - TDK Electronics

572
B65813J0000R049

Datasheet

RM10 Box Active RM RM 10 - 2.9 µH -20%, +30% N49 Ungapped 1040.0 1500 0.45 44.0 Uncoated 98.0 4310.0 90.0 0.368" (9.35mm) 1.122" (28.50mm) 0.531" (13.50mm)
B66365G1500X187

B66365G1500X187

FERRITE CORE ETD N87 1PC

EPCOS - TDK Electronics

287
B66365G1500X187

Datasheet

ETD44/22/15 Box Active ETD ETD 44 x 22 x 15 - - - N87 Gapped - - - - Uncoated - - - 0.886" (22.50mm) 1.724" (43.80mm) 0.598" (15.20mm)
PQ32/30-3F36

PQ32/30-3F36

FERRITE CORE PQ 3F36 2PC SET

Ferroxcube

1,508
PQ32/30-3F36

Datasheet

- Bulk Active PQ PQ 32 x 30 - - - 3F36 - - - - - Uncoated - - - 1.193" (30.30mm) 1.299" (33.00mm) 0.866" (22.00mm)
C055380A2

C055380A2

FERRITE CORE TOROID 89NH MPP

Magnetics, a division of Spang & Co.

1,484
C055380A2

Datasheet

- Bulk Active Toroid - 0.710" (18.03mm) 89 nH ±8% MPP Ungapped - 125 - 41.4 Coated 23.2 960.0 - 0.280" (7.11mm) - -
CMC025016010H

CMC025016010H

NANOCRYSTAL CORE TOROID 65.5UH

Magnetics, a division of Spang & Co.

244
CMC025016010H

Datasheet

- Bulk Active Toroid - 0.984" (25.00mm) 65.5 µH ±30% Nanocrystalline Ungapped - 80000 - 64.3 Polyester 37.0 - - 0.394" (10.00mm) - -
B65813J0000R041

B65813J0000R041

FERRITE CORE RM 5.5UH N41 2PCS

EPCOS - TDK Electronics

734
B65813J0000R041

Datasheet

RM10 Box Active RM RM 10 - 5.5 µH -20%, +30% N41 Ungapped 1960.0 2800 0.45 44.0 Uncoated 98.0 4310.0 90.0 0.368" (9.35mm) 1.122" (28.50mm) 0.531" (13.50mm)
C055117A2

C055117A2

FERRITE CORE TOROID 115NH MPP

Magnetics, a division of Spang & Co.

708
C055117A2

Datasheet

- Bulk Active Toroid - 0.680" (17.27mm) 115 nH ±8% MPP Ungapped - 200 - 41.2 Coated 19.2 791.0 - 0.280" (7.11mm) - -
PQ35/35-3F36

PQ35/35-3F36

FERRITE CORE PQ 3F36 2PC SET

Ferroxcube

366
PQ35/35-3F36

Datasheet

- Bulk Active PQ PQ 35 x 35 - - - 3F36 - - - - - Uncoated - - - 1.366" (34.70mm) 1.421" (36.10mm) 1.024" (26.00mm)
B65813J0630J041

B65813J0630J041

FERRITE CORE RM 630NH N41 2PCS

EPCOS - TDK Electronics

879
B65813J0630J041

Datasheet

RM10 Box Active RM RM 10 - 630 nH ±5% N41 Gapped 225.0 2800 0.45 44.0 Uncoated 98.0 4310.0 90.0 0.368" (9.35mm) 1.122" (28.50mm) 0.531" (13.50mm)
B65813J1600K041

B65813J1600K041

FERRITE CORE RM 1.6UH N41 2PCS

EPCOS - TDK Electronics

209
B65813J1600K041

Datasheet

RM10 Box Active RM RM 10 - 1.6 µH ±10% N41 Gapped 572.0 2800 0.45 44.0 Uncoated 98.0 4310.0 90.0 0.368" (9.35mm) 1.122" (28.50mm) 0.531" (13.50mm)
5975002701

5975002701

FERRITE CORE TOROID 75

Fair-Rite Products Corp.

678
5975002701

Datasheet

- Bulk Active Toroid - 1.400" (35.56mm) - ±25% 75 Ungapped - 5000 - 89.0 Uncoated 79.0 7000.0 - 0.500" (12.70mm) - -
C058059A2

C058059A2

FERRITE CORE TOROID 43NH MPP

Magnetics, a division of Spang & Co.

118
C058059A2

Datasheet

- Bulk Active Toroid - 0.930" (23.62mm) 43 nH ±8% MPP Ungapped - 60 - 56.7 Coated 31.7 1800.0 - 0.330" (8.38mm) - -
5961002721

5961002721

FERRITE CORE TOROID 140NH 61

Fair-Rite Products Corp.

216
5961002721

Datasheet

- Box Active Toroid - 1.449" (36.80mm) 140 nH ±25% 61 Ungapped - 125 1.14 89.0 Epoxy 78.0 7000.0 - 0.539" (13.70mm) - -
B66289K0000X187

B66289K0000X187

FERRITE CORE I N87

EPCOS - TDK Electronics

3,591
B66289K0000X187

Datasheet

I38/4/25 Tray Active I I 38 x 4 x 25 - - - N87 Ungapped - - - - Uncoated - - - 0.150" (3.81mm) 1.500" (38.10mm) 1.000" (25.40mm)
B65651D0250A048

B65651D0250A048

FERRITE CORE P 250NH N48 2PCS

EPCOS - TDK Electronics

1,726
B65651D0250A048

Datasheet

P18/11 Box Active P (Pot Core) P 18 x 11 0.724" (18.40mm) 250 nH ±3% N48 Gapped 120.0 - 0.6 25.9 Uncoated 43.0 1114.0 - 0.209" (5.30mm) - -
0077256A7

0077256A7

FERRITE CORE TOROID 35NH KOOL MU

Magnetics, a division of Spang & Co.

262
0077256A7

Datasheet

- Bulk Active Toroid - 1.605" (40.77mm) 35 nH ±8% Kool Mu Ungapped - 26 - 98.4 Coated 107.0 10600.0 - 0.605" (15.37mm) - -
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