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PQ Cores (6678272521)

Part Number: 6678272521
78 PQ CORE SET
Dimensions
Inductive Components
Closed Magnetic Circuit
Printer Friendly Data Sheet
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Part Number: 6678272521

78 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: 36 (g)

Dimmmmm tolnominal inchinch misc.
A26.5± 0.501.043_
B12.5± 0.150.492_
C19± 0.400.748_
D8.05± 0.150.317_
E22.5± 0.400.886_
F12± 0.300.472_
G15.5min0.61min

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)4670 ±25%
Ae(cm2)1.177
Σl/A(cm-1)4.59
le(cm)5.4
Ve(cm3)6.359
Amin(cm2)1.131

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

A MnZn ferrite specifically designed for power applications for frequencies up to 200 kHz and low loss inductive applications to 500 kHz.

Available in 78 material:

RFID Rods

Toroids

Mated Parts

78 Material Characteristics
Property Unit Symbol Value
Initial Permeability @ B < 10 gauss µi 2300
Flux Density @ Field Strength Gauss
Oersted
B
H
4800
5
Residual Flux Density Gauss Br 1500
Coercive Force Oersted Hc 0.20
Loss Factor @ Frequency 10 -6
MHz
Tan δ/ µi 4.5
0.1
Temperature Coefficient of Initial Permeability (20 -70°C) %/°C 1.0
Curie Temperature °C Tc >200
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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