HAHN CQ Line

D.C Door Retainer Magnets for the HAHN CQ^Line are primarily used as hold open devices for fire protection exclusions (fire protection swing doors, rolling gates, fire shutters with self locking devices). The fire door is normally held in the open state to allow easy passage and access through busy corridors etc. Controlled by a fire detection or smoke protection control unit, the door retainer releases the door when the power is cut and the over-door closer quickly closes the fire door automatically to prevent the spread of fi re and smoke throughout the building. Integrated into the design is a spring loaded anti-remenance pin which ensures zero residual holding force when the magnet is de-energised, thus enabling faster closing of the fire door.

Depending upon the line HAHN door holding magnets are quality tested by the VdS in Cologne according to the regulations of the German institute of Structural Engineering (“Deutsches Institut fur Bautechnik”) resp. tested according to the Eurocode (“Euronorm”) EN1155.

Apart from the classic application door holding solenoids can also be used as locking devices for standard, house or business doors – wherever a door needs to be kept open safely as a passageway. The stylish versions of the new CQ^STAR line offer completely new design options for architects: the variable selection of colours and surfaces as well as the integrated LED-illumination are unique features in this respect.


Magnetic locks are normally used at emergency areas for security doors. There the magnetic lock ist the ideal solution. Compared to electric bolts or strikes it is much more installer friendly.  For the locksmith wiring an electromagnet is as simple as connecting a Hifi and for the electrician a light drill and a srewdriver is sufficient to install it in a very professional way. With our range from 800 N to 10600 N and our offered accessories it is a product, suitable for installation for all types of access control systems. An Integrated sensor and a LED shows directly and external the function of the lock, if the door is open our closed.