Force, magnetic force
The magnetic force is the electromagnetically generated, useful mechanical force in the direction of action.

Pull-in force
The pull-in force (FA) is the magnetic force that is achieved with the nominal stroke, operating temperature, 0.9 fold nominal voltage and unfavourable fitting position.

Holding force
The holding force (FH) is the smallest force sufficient for pulling off the core at operating temperature, 0.9 fold nominal voltage and unfavourable fitting position.

Stroke force
The stroke force is the magnetic force, heeding the weight of the core.

Holding power
(Input power when holding)
In case or alternating current devices, this is the apparent power that occurs after the transient process has subsided, when the core is in the final stroke position.

Limiting performance
The limiting performance is the product resulting from the square of the limiting current and the coil resistance at operating temperature.

Magnetic force ­ characteristic curve
The magnetic force ­ characteristic curve is the graphic depiction of the magnetic force depending on the stroke. The magnetic force ­ characteristic curves may be reduced to the depicted idealised magnetic force ­ characteristic curves and be characterized with the help of a few parameters.

Pull-in power
(input power upon pull-in)
In case of alternating-current solenoids, it is the apparent power that occurs after the end of the balancing process, when the core is held in the initial stroke position.

Rated power P 20
(Rated input power)
The power consumption at the rated current as quoted by the manufacturer.

Holding current
In case or alternating current devices, this is the current that occurs on excitation, when the core is held in the final position and the transient process has subsided.

Limiting current
The limiting current is the maximum permissible current the device may be exposed to permanently without a thermal overburden.

Nominal current
In devices with a voltage coil, it relates to the nominal voltage and 20 degrees Celsius coil temperature and possibly the nominal frequency. In case of alternating-current devices and in so far as nothing special is quoted, the nominal voltage is quoted as the nominal holding current. In devices with a current coil, the nominal current is quoted by the manufacturer.

Prefered nominal voltage
The nominal voltage at which the devices are mostly stored.

Starting current
In case or alternating current devices, this is the current that occurs on excitation, when the core is held in the initial position and the transient process has subsided.