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PQ Cores (6698211621)

Part Number: 6698211621
98 PQ CORE SET
Dimensions
Inductive Components
Closed Magnetic Circuit
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Part Number: 6698211621

98 PQ CORE SET

PQ cores were developed for use in power applications. The large surface area to volume of the core aids in heat dissipation. PQ cores are employed both in filter and transformer designs for switch mode power supplies.

• PQ cores can be supplied with the centerpost gapped to a mechanical dimension or an ALvalue.

Catalog Drawing
3D Model

Weight indicated is per pair or set.

Weight: 13 (g)

Dimmmmm tolnominal inchinch misc.
A20.5± 0.400.807_
B8± 0.150.315_
C14± 0.400.551_
D5± 0.150.197_
E18± 0.400.709_
F8.8± 0.200.346_
G12min0.472min

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)3430 ±25%
Ae(cm2)0.615
Σl/A(cm-1)6
le(cm)3.69
Ve(cm3)2.27
Amin(cm2)0.601

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

A low loss MnZn ferrite material for power applications up to 200 kHz.

New type of 98 material is an improved version of Fair-Rite’s 78 material. This material supplies lower power loss at 100°C at moderate flux densities for operation below 200 kHz.

Available in 98 material:

E&I Cores

Pot Cores

RM

PQ

ETD

EFD

EP

EER

Planar Shapes

98 Material Characteristics
Property Unit Symbol Value
Initial Permeability @ B < 10 gauss µi 2400
Flux Density @ Field Strength Gauss
Oersted
B
H
5000
5
Residual Flux Density Gauss Br 1800
Coercive Force Oersted Hc 0.17
Loss Factor @ Frequency 10 -6
MHz
Tan δ/ µi 3.5
0.1
Temperature Coefficient of Initial Permeability (20 -70°C) %/°C 1.5
Curie Temperature °C Tc >215
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.

Material Safety Data Sheet (MSDS)

Click here to download Complex Permeability vs. Frequency (CSV)

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.


Storage and Operating Temperature
Printer Friendly Data Sheet - Download as pdf file

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