GD650S / FR-GD650S Fire Door Retaining Magnet

The GD650S Series Door Retaining Magnet is a electromagnetic door holder designed to safely hold open fire doors during normal operation and automatically release them when connected fire alarm systems activate. Also known as a fire door retainer, fire door hold open magnet, fire door holder, fire door hold open device, door hold open magnet, or electromagnetic door holder, the GD650S provides a reliable solution for fire door management in commercial, educational, healthcare, and public sector buildings.

Designed for integration with fire alarm systems, the GD650S allows fire doors to remain open for convenience and accessibility. Upon activation of the fire alarm system, power is removed from the magnet, allowing the door closer to automatically close the fire door and help prevent the spread of smoke and fire throughout the building.

Manufactured from durable stainless steel, the GD650S Series provides dependable performance and long-term reliability. The FR-GD650S-12 and FR-GD650S-24 fire-rated versions have been tested to BS EN 1155 for electrically powered hold-open devices and fire tested to BS EN 1634-1. They are suitable for compatible FD30 and FD60 fire doors and hold a 1-hour UK fire certificate. All models include an integrated override switch for local release of the retained door when required.

Available Models

• GD650S-12 – 12vDC Flush Mounted Fire Door Retaining Magnet
• GD650S -24 - 24vDC Flush Mounted Fire Door Retaining Magnet
• FR-GD650S-12 - Fire Rated 12vDC Flush Mounted Fire Door Retaining Magnet
• FR-GD650S-24 - Fire Rated 24vDC Flush Mounted Fire Door Retaining Magnet

Key Features

• Flush mounted door retaining magnet
• Suitable for fire door hold-open applications
• Operating voltage 12VDC or 24VDC
• Holding force up to 100lbs (45kg)
• Integrated override release switch
• Durable stainless steel construction
• FR models tested to BS EN 1155
• FR models fire tested to BS EN 1634-1
• Suitable for compatible FD30 and FD60 fire doors
• 1-hour UK fire certificate
• Suitable for connection to fire alarm systems
• Reliable automatic door release operation
• Compact design
• Suitable for commercial and public buildings

Typical Applications

• Fire doors
• Smoke control systems
• Commercial buildings
• Office buildings
• Schools and educational facilities
• Healthcare environments
• Hotels and hospitality venues
• Public buildings
• Corridors and escape routes
• Assisted access environments

Compatibility

The GD650S Series is designed to integrate with a wide range of fire safety and door control equipment.

• Fire alarm systems
• Fire doors
• Door closers
• Smoke control systems
• Building management systems
• Emergency door control systems
• Access control systems
• Life safety systems
• Power supplies

Technical Specification

• Product Type: Door Retaining Magnet
• Operating Voltage: 12VDC or 24VDC
• Holding Force: Up to 100lbs (45kg)
• Hold-Open Device Testing: BS EN 1155
• Fire Testing: BS EN 1634-1
• Fire Door Suitability: Compatible FD30 and FD60 fire doors
• Certification: 1-Hour UK Fire Certificate
• Mounting Type: Flush mount
• Override Switch: Integrated
• Material: Stainless steel
• Dimensions: 85mm x 85mm x 35mm (H x W x D)

GD650S Product Information

FR-GD650S Product Information 

The GD650S Series Fire Door Retaining Magnets provide a reliable and practical solution for controlled fire door hold-open applications. Available in 12VDC and 24VDC versions, all models feature durable stainless steel construction, an integrated override release switch, and compatibility with fire alarm systems. The FR-GD650S-12 and FR-GD650S-24 fire-rated versions are additionally tested to BS EN 1155 and fire tested to BS EN 1634-1, are suitable for compatible FD30 and FD60 fire doors, and hold a 1-hour UK fire certificate.

Frequently Asked Questions

What is the GD650S used for?

The GD650S is used to hold fire doors open during normal operation and automatically release them when a fire alarm system is activated.

What is a Door Retaining Magnet?

A door retaining magnet, also known as a fire door retainer, fire door hold open magnet, door hold open magnet, or electromagnetic door holder, is used to hold fire doors open during normal operation and automatically release them when a fire alarm activates.

What holding force does the GD650S provide?

The GD650S provides a holding force of up to 100lbs (45kg).

Can the GD650S operate on both 12VDC and 24VDC?

Yes. Both the GD650S and FR-GD650S are designed to operate on either 12VDC or 24VDC power supplies.

Does the GD650S Series include a manual release function?

Yes. The unit includes an integrated override switch that allows local release of the retained door.

Are the FR-GD650S models fire rated?

Yes. The FR-GD650S-12 and FR-GD650S-24 have been tested to BS EN 1155 for electrically powered hold-open devices and fire tested to BS EN 1634-1. They are suitable for compatible FD30 and FD60 fire doors and hold a 1-hour UK fire certificate.

Can the GD650S be connected to a fire alarm system?

Yes. The GD650S Series are designed to work with fire alarm systems so that doors automatically close when an alarm is activated.