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Planar Cores (7895400421)

Part Number: 7895400421
95 PLANAR EI CORE SET
Dimensions
Inductive Components
Closed Magnetic Circuit
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Part Number: 7895400421

95 PLANAR EI CORE SET

Planar EE and EI cores, with their low profile are suitable for board level installation allowing assembly without the need for plastic coilformers and can also allow windings integrated into multi-level PCBs. Planar ER cores with their low mass and low profile are suitable for Surface Mount installations in low power filter and transformer applications.

• Planar EE, ER and EI cores can be supplied with the center post gapped to a mechanical dimension, or an AL value.

Weight: 24 (g)

Dimmmmm tolnominal inchinch misc.
A31.75± 0.501.25_
B6.35± 0.150.25_
C20.32± 0.400.8_
D3.18± 0.150.125_
E24.5min0.965min
F6.35± 0.200.25_
G3.18± 0.150.125_

Chart Legend
Σl/A  :  Core Constant,    le :  Effective Path Length,    Ae :  Effective Cross-Sectional Area,    Ve :  Effective Core Volume
AL :  Inductance Factor  
Explanation of Part Numbers: Digits 1 & 2 = product class and 3 & 4 = material grade.

Electrical Properties
AL(nH)8700 ±25%
Ae(cm2)1.3
Σl/A(cm-1)2.7
le(cm)3.52
Ve(cm3)4.57
Amin(cm2)1.29

AL value is measured at 1 kHz, B < 10 gauss.

A low loss MnZn ferrite material for power applications up to 200 kHz with low temperature variation. New type of 95 material is a low loss power material which features less power loss variation over temperature (25-100°C) at moderate flux densities for operation below 200 kHz.

Available in 95 material:

Pot Cores

RM

PQ

EFD

EP

95 Material Characteristics
Property Unit Symbol Value
Initial Permeability @ B < 10 gauss µi 3000
Flux Density @ Field Strength Gauss
Oersted
B
H
5000
5
Residual Flux Density Gauss Br 800
Coercive Force Oersted Hc 0.13
Loss Factor @ Frequency 10 -6
MHz
Tan δ/ µi 3
0.1
Temperature Coefficient of Initial Permeability (20 -70°C) %/°C 0.4
Curie Temperature °C Tc >220
Resistivity Ohm-cm ρ 200

**** Characteristic curves are measured on standard Toroids (18/10/6 mm)  at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.

Ferrite Material Constants

Specific Heat
0.25 cal/g/°C
Thermal Conductivity
3.5 - 4.5 mW/cm-°C
Coefficient of Linear Expansion
8 - 10x10-6/°C
Tensile Strength
4.9 kgf/mm2
Compressive Strength
42 kgf/mm2
Young's Modulus
15x103 kgf/mm2
Hardness (Knoop)
650
Specific Gravity
≈4.7 g/cm3
The above quoted properties are typical for Fair-Rite MnZn and NiZn ferrites.


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