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Flux Density on Axis of a Rectangle Magnet with Backplate

More Calculations

To estimate the flux density at a distance X above the surface and on the center-line of a rectangle magnet with backplate and magnetized parallel to its thickness, please input the values and click the Calculate button. All of the units of L, W, T and X must be same in inch (or all same in mm).

This calculation is used for the magnetic materials with straight demagnetization curves, such as Ceramic magnets, Neodymium magnets and Samarium Cobalt magnets.

Rather than a sole data for your design, the result of this calculation is an approximation and only for your reference. Armstrong Magnetics, inc. will not be held liable for its use.

Flux Density on axis of rectangle magnet with steel backplate

Calculator

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The data of Residual Induction (Br) in Gauss
Ceramic magnets
 C1 C5 C8
2300 3800 3850
N35 N38 N40 N42 N45 N48 N50 N52
11400 11800 12700 12900 13300 13800 13800 14300
SmCo5, 18 SmCo5, 20 SmCo5, 22 SmCo5, 24 Sm2Co17, 24 Sm2Co17, 26 Sm2Co17, 28 Sm2Co17, 30
8500 9000 9000 9600 9500 10200 10300 10800