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  • Kidde | Electromagnetic Fire Door Holder, Surface Wall Mount, 24-120VAC/DC, UL/ULC Listed | 1508-AQN5
Electromagnetic Fire Door Holder, Surface Wall Mount, 24-120VAC/DC, UL/ULC Listed
Kidde Commercial

Electromagnetic Fire Door Holder, Surface Wall Mount, 24-120VAC/DC, UL/ULC Listed

SKU KD-1508-AQN5

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The Kidde 1508-AQN5 electromagnetic door holder keeps fire-rated doors open during normal building operation and releases instantly when the fire alarm system cuts power. Surface wall-mount design with multi-voltage 24-120VAC/DC input and 25 lb holding force - a straightforward drop-in for commercial fire door compliance work.

Built for the commercial installer

Multi-voltage operation (24VDC through 120VAC) covers both low-voltage and line-voltage installations with one SKU - no separate transformer required. UL and ULC listed for fire door hold-open service. Fail-safe design releases the door on power loss or fire alarm activation, meeting code requirements for fire-rated door assemblies.

Key features

  • Fail-safe release: door closes automatically when power is removed by fire alarm signal or power loss
  • Multi-voltage input (24-120VAC/DC): single SKU covers low-voltage and line-voltage installations
  • Surface wall mount: mounts directly to wall surface adjacent to fire door
  • 25 lb holding force: reliable hold on standard commercial fire doors
  • UL and ULC listed for fire door hold-open service
  • Brushed aluminum finish: durable, low-profile appearance for commercial environments

System requirements

Connects to the building fire alarm system or a dedicated power circuit interrupted on alarm. The holder operates in the normally-energized (hold-open) state and releases when power is cut. Compatible with any FACP that provides a supervised NAC or relay output for door holder release.

Specifications

SKUKD-1508-AQN5
BrandKidde Commercial
Form factorSurface wall mount electromagnetic door holder
Operating voltage24VDC / 120VAC (multi-voltage)
Holding force25 lbs
Release typeFail-safe (releases on power loss)
FinishBrushed aluminum
ComplianceUL Listed, ULC Listed
ApplicationFire door hold-open service

Documents and resources

FAQs

How does an electromagnetic door holder release on fire alarm?
The holder is normally energized to keep the door open. When the fire alarm activates, power is cut and the electromagnet releases, allowing the door to close under its own closer. Fail-safe design means the door also closes on any power loss.
What voltage does the 1508-AQN5 require?
The 1508-AQN5 is multi-voltage: it operates on 24VDC through 120VAC. One SKU covers both low-voltage (alarm panel NAC) and line-voltage (120VAC circuit) installations without an external transformer.
What holding force does this door holder provide?
25 lbs of holding force - sufficient for standard commercial fire doors with properly adjusted door closers.
Is this door holder UL Listed?
Yes. UL and ULC listed for fire door hold-open service. Meets code requirements for fire-rated door assemblies when installed per manufacturer instructions.
What fire alarm panel compatibility does this require?
Compatible with any FACP that provides a supervised NAC circuit or relay output for door holder release. The holder connects as a notification appliance on the release circuit - no proprietary protocol required.
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