Powerful electro-magnets in a range of sizes and voltage for holding/ energizing or releasing / de-energized. Ideal for use in machine mechanisms, door guard locking and applications with remote hold / release requirements. Optimum performance when used with Erich armature plates (available separately) but suitable for holding any smooth ferrous surface of adequate thickness. Electrical connection by free leads. Coils are continuously rated at the specified supply voltage, a.c. Or d.c. Zinc plated magnet body and armature plates. Magnets mounted on rear face by center tapped holes or 3 tapped holes on PCD. Remanence (approx. 5% of holding force) may be reduced by fitting non magnetic shim between magnet and armature.

An electromagnet consists of a coil of wire wrapped on an iron core and generates magnetic flux when electricity is allowed to pass through it. The coil forms the shape of the tube which is called as solenoid. If ferromagnetic material is placed inside the coil much stronger magnetic field can be created. Much stronger magnetic fields can be produced if a "core" of paramagnetic or ferromagnetic material (commonly iron) is placed inside the coil.
Electric current when passes through the soft iron core, produces an energy which is called magnetic flux. If insulated wire is wrapped around an iron or steel object, a powerful magnetic field is produced. When electricity is passed through a coiled wire a stronger magnetic field is generated. The strength of the magnetic field depends upon and is directly proportional to the number of coils, the strength of the current, and the magnetic permeability of the core material. Apart from these factors, the number of turns made by the coil will determine the strength of the field.