Electromagnetic Door Holder, High Hold, Opening Action Electromagnetic Release, Aluminum, Amp Draw @ 24V 0.25, Input Voltage 24, Projection from Wall 2 1/4 In., Total Projection 5 1/4 In., Holding Force 300 Lb., Armature Length Adjustable In., Sprayed Aluminum Finish, Standards ANSI/BHMA 156.15,UL, UL of Canada, Cal. State Fire Marshal The RIXSON(R) electromagnetic door release holds door open until released by a fire alarm system, remote smoke detector, or other switching device. Fail-safe operation-power failure releases door to a closed position. Door closer is required to close door. This surface- or concealed-mount model requires a surface adapter housing (junction box), which is included. 300-lb holding force.
eBay