8071 – Neodymium Magnet Disk N42H D4.5mm(A) x 1.5mm

SKU 8071 is a compact N42H neodymium disk magnet measuring 4.5 mm diameter × 1.5 mm thick. Unlike an axially magnetized disk, its north and south poles sit on opposite curved sides of the diameter. This side-to-side field orientation is commonly selected for rotational sensing, encoder and position-detection assemblies.

4.5mm N42H Sensor Magnet Design Notes

The N42H grade combines strong magnetic output with a listed maximum temperature of 120°C / 248°F. Actual usable temperature depends on the magnetic circuit, air gap, operating point and exposure time, so validate the magnet in the complete assembly when working near its temperature limit.

The listed 0.93 lb pull force is a comparison value under defined contact conditions, not a guaranteed safe working load. Air gap, target-steel thickness, coating, surface roughness and shear loading can reduce usable force.

Use the Magnet Pull Force Calculator for preliminary magnet-to-steel screening or the Neodymium Magnet Grade Chart when comparing N42H with other temperature classes and energy grades.