Click here for product information pb rohs_mat rohs_comp  msds

RM Cores (6298420121)

Part Number: 6298420121
98 RM CORE SET
Dimensions
Inductive Components
Closed Magnetic Circuit
Printer Friendly Data Sheet
Check Stock

Part Number: 6298420121

98 RM CORE SET

RM (Rectangular Modulus) cores allow better shielding than E type geometries while also providing easier winding accessibility and better power dissipation than a pot core configuration. Fair-Rite’s standard RM cores all have a solid center post and standard height, low profile and alternate materials are available upon request.

• RM cores can be supplied with the center post gapped to a mechanical dimension or an AL value.

Weight indicated is per pair or set.

Weight: 69 (g)

Dimmmmm tolnominal inchinch misc.
A41.6± 0.601.638_
B15.05± 0.100.593_
C18.7± 0.300.736_
D10.55± 0.200.415_
E29.5± 0.501.161_
F14.75± 0.250.581_
G17min0.669min
J34.15± 0.651.344_

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)6200 ±25%
Ae(cm2)1.95
Σl/A(cm-1)3.8
le(cm)7.38
Ve(cm3)14.37
Amin(cm2)1.709

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:

Toroids

U Cores

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.

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.


Printer Friendly Data Sheet - Download as pdf file