How to Order Magnetics Ferrite Cores

Magnetics ferrite cores have unique part numbers that provide important information about the characteristics of the cores. A description of part type is provided below.

Quick Search:

Toroids
E, I Cores
Planar E, I Cores
ER Cores
U, I Cores
UR Cores
EC Cores
EER Cores
EFD Cores
ETD Cores
Block Cores
EP Cores
Pot Cores
RS-DS Cores
PQ Cores
RM Cores

Toroids

1. Coating Code
- 0 = Bare Core
- Y = Parylene Coating
- Z = Epoxy Coating
2. Ferrite Core Material
1. Material L R P F T J W M C
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20% 3,000 ±25% 5,000 ±20% 10,000 ±30% 15,000 ±30% 900 ±25%
  3. Indicator used for all Ferrite cores
2. 4. Approximate diameter in mm
3. 5. Approximate height in mm
4. 6. Geometry Code (TC - Toroidal Core)

E, I Cores

1. Coating Code (Bare)
2. Ferrite Core Material
1. Material L R P F T J W
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20% 3,000 ±25% 5,000 ±20% 10,000 ±30%
  3. Indicator used for all Ferrite cores
2. 4. Approximate length in mm
3. 5. Approximate height in mm
4. 6. Geometry Code
5. EC - E core Family
6. IC - I core

Cores are sold per piece (for sets multiple by 2). Any practical gap available.

Planar E, I Cores

1. Shape Code

C - Planar core with clip recesses
F or 0 - Planar core option: no clip recesses
For clip slot dimensions see individual datasheets

2. Ferrite Core Material
1. Material L R P F
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20%
  3. Indicator used for all Ferrite cores
2. 4. Approximate length in mm
3. 5. Approximate width in mm
4. 6. Geometry Code
5. EC - E Core Family
6. IC - Planar I core

Cores are sold per piece (for sets multiple by 2). Any practical gap available.

ER Cores

1. Shape Code

C - ER core with clip recesses
F or 0 – ER core option: no clip recesses
For clip slot dimensions see individual datasheets

2. Ferrite Core Material

Material	L	R	P	F
Permeability (µ_i)	750 ±25%	2,300 ±25%	2,500 ±25%	3,000 ±20%

3. Indicator used for all Ferrite cores
4. Approximate length in mm
5. Approximate depth in mm
6. Geometry Code

EC– E Core Family
IC – I core

Cores are sold per piece (for sets multiple by 2). Any practical gap available.

U, I Cores

1. Coating Code (Bare)
2. Ferrite Core Material

Material	L	R	P	F	J	W
Permeability (µ_i)	750 ±25%	2,300 ±25%	2,500 ±25%	3,000 ±20%	5,000 ±20%	10,000 ±30%

3. Indicator used for all Ferrite cores
4. Approximate length in mm
5. Approximate width in mm
6. Geometry Code

UC - U core Family
IC - I core

Cores are sold per piece (for sets multiple by 2).

UR Cores

1. Coating Code (Bare)
2. Ferrite Core Material

Material	R	P	F
Permeability (µ_i)	2,300 ±25%	2,500 ±25%	3,000 ±20%

3. Indicator used for all Ferrite cores
4. Approximate length in mm
5. Approximate depth in mm
6. Geometry Code (UC - U Core Family)

Cores are sold per piece (for sets multiple by 2).

EC Cores

1. Coating Code (Bare)
2. Ferrite Core Material
1. Material R P F
  Permeability (µ_i) 2,300 ±25% 2,500 ±25% 3,000 ±20%
  3. Indicator used for all Ferrite cores
  4. Approximate length in mm
  5. Approximate width in mm
2. 6. Geometry Code (EC - E Core Family)

Cores are sold per piece (for sets multiple by 2). Any practical gap available.

EER Cores

1. Coating Code (Bare)
2. Ferrite Core Material
1. Material L R P F
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20%
  3. Indicator used for all Ferrite cores
  4. Approximate length in mm
  5. Approximate height in mm
2. 6. Geometry Code (EC - E Core Family)

Cores are sold per piece (for sets multiple by 2). Any practical gap available.

EFD Cores

1. Coating Code (Bare)
2. Ferrite Core Material
1. Material L R P F T J
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20% 3,000 ±25% 5,000 ±20%
  3. Indicator used for all Ferrite cores
2. 4. Approximate length in mm
3. 5. Approximate width (per set) in mm
4. 6. Geometry Code (EC - E Core Family)

Cores are sold per piece (for sets multiple by 2). Any practical gap available.

ETD Cores

1. Coating Code (Bare)
2. Ferrite Core Material
1. Material L R P F
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20%
  3. Indicator used for all Ferrite cores
2. 4. Approximate length in mm
3. 5. Approximate height (per set) in mm
4. 6. Geometry Code (EC - E Core Family)

Cores are sold per piece (for sets multiple by 2).Any practical gap available.

Block Cores

1. Coating Code (Bare)
2. Ferrite Core Material
1. Material L R P F J
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20% 5,000 ±20%
3. Indicator used for all Ferrite cores
4. Approximate length in mm
5. Approximate height in mm
6. Geometry Code (FB - Ferrite Block)

Cores are sold per piece.

EP Cores

1. Shape Code
2. Ferrite Core Material
1. Material L R P F T J W
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20% 3,000 ±25% 5,000 ±20% 10,000 ±30%
  3. Indicator used for all Ferrite cores
2. 4. Approximate length in mm
3. 5. Approximate height (per set) in mm
4. 6. Geometry Code (UG - Pot Core Family)

Cores are sold in sets. Any practical gap available.

Pot Cores

1. Coating Code (Bare)
2. Ferrite Core Material
1. Material R P F T J W C E V
  Permeability (µ_i) 2,300 ±25% 2,500 ±25% 3,000 ±20% 3,000 ±25% 5,000 ±20% 10,000 ±30% 900 ±25% 2,000 ±25% 2,300 ±25%
3. Indicator used for all Ferrite cores
4. Approximate diameter in mm
5. Approximate height (per set) in mm
6. Geometry Code (UG - Pot Core Family)

Cores are sold in sets. Any practical gap available.

RS-DS Cores

1. Shape Code

D – DS Core with solid centerpost
H – DS Core with center hole
S – RS Core

2. Ferrite Core Material
1. Material R P F J W
  Permeability (µ_i) 2,300 ±25% 2,500 ±25% 3,000 ±20% 5,000 ±20% 10,000 ±30%
  3. Indicator used for all Ferrite cores
2. 4. Approximate length in mm
3. 5. Approximate height (per set) in mm
4. 6. Geometry Code (UG - Pot Core Family)

Cores are sold in sets. Any practical gap available.

PQ Cores

1. Coating Code (Bare)
2. Core Material
1. Material L R P F T
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20% 3,000 ±25%
  3. Indicator used for all Ferrite cores
2. 4. Approximate length in mm
3. 5. Approximate height (per set) in mm
4. 6. Geometry Code (UG - Pot Core Family)

Cores are sold in sets.Any practical gap available.

For clip slot dimensions see individual datasheets.

RM Cores

1. Shape Code

N – RM Core with solid centerpost
R – RM Core with center hole

2. Ferrite Core Material
1. Material L R P F T J W C V
  Permeability (µ_i) 750 ±25% 2,300 ±25% 2,500 ±25% 3,000 ±20% 3,000 ±25% 5,000 ±20% 10,000 ±30% 900 ±25% 2,300 ±25%
3. Indicator used for all Ferrite cores
4. Approximate diameter in mm
5. Approximate height (per set) in mm
6. Geometry Code (UG - Pot Core Family)

Material	L	R	P	F	T	J
Permeability (µ_i)	750 ±25%	2,300 ±25%	2,500 ±25%	3,000 ±20%	3,000 ±25%	5,000 ±20%