Product Data Sheet Generated June 25, 2026
fair-rite.com

Planar Cores (9579250802)

Part No. 9579250802

Part Number

9579250802

Description

79 EQ Core-EQ25/8/18

Part Type

Planar Cores

Frequency Range

79 Material

Application Type

Inductive Components

Where Used

Closed Magnetic Circuit

Material Grade

Ordering Information

Part Number: 9579250802

79 EQ Core-EQ25/8/18

Planar EQ and EQI 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 EQ cores with their low mass and low profile are suitable for Surface Mount installations in low power filter and transformer applications.

– Planar EQ and EQI cores can be supplied with the center post gapped to a mechanical dimension, or an A_L value.

Mechanical Specifications

Weight: 11.0 (g)

Chart Legend
•Dimensions (Top numbers are in millimeters, bottom numbers are in nominal inches.).

Dim	mm	mm tol	nominal inch	inch misc.
A	25.0	± 0.40	0.984	_
B	8.00	± 0.10	0.315	_
C	18.00	± 0.35	0.709	_
D	5.15	± 0.15	0.203	_
E	22.00	± 0.40	0.866	_
F	11.00	± 0.20	0.433	_
G	14.4	± Min	0.567	_

Electrical Specifications

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

Electrical Properties
AL(nH)	3100
Ae(cm²)	1.0
Σl/A(cm⁻¹)	4.15
le(cm)	4.15
Ve(cm³)	4.150
Amin(cm²)	0.950

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

This document was generated automatically from Fair-Rite's product database. For the most current specifications, visit fair-rite.com.