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  • Kidde | 10-Inch Fire Alarm Vibrating Bell, Diode Polarized, 86 dB, 20-24 VDC, Gray, Wall/Ceiling Mount | 439D-10AW
10-Inch Fire Alarm Vibrating Bell, Diode Polarized, 86 dB, 20-24 VDC, Gray, Wall/Ceiling Mount
Kidde Commercial

10-Inch Fire Alarm Vibrating Bell, Diode Polarized, 86 dB, 20-24 VDC, Gray, Wall/Ceiling Mount

SKU KD-439D-10AW

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The Kidde 439D-10AW is a 10-inch vibrating fire alarm bell built for commercial and institutional notification circuits. Diode polarized for clean circuit supervision, it delivers 86 dB at 10 ft on 20-24 VDC - loud enough for corridors, warehouses, and mechanical rooms without adding complexity to the NAC loop.

Built for the commercial installer

The underdome design with heavy-duty mechanism mounts to standard single-gang or 4-inch octagonal boxes, wall or ceiling. The alloy steel gong handles the abuse of high-traffic commercial environments. UL Listed, FM Approved, and MEA Approved for broad jurisdictional acceptance. Add the 449 back box for outdoor or weatherproof installations.

Key features

  • Diode polarized for supervised NAC circuit compatibility
  • 86 dB at 10 ft per UL 464 - adequate coverage for commercial corridors and rooms
  • Wall or ceiling mount on standard single-gang or 4" octagonal boxes
  • Weatherproof capable with optional 449 outdoor back box
  • UL Listed, FM Approved, MEA Approved for broad jurisdictional acceptance
  • Alloy steel gong for durability in high-traffic commercial environments

System requirements

Requires 20-24 VDC from the fire alarm control panel NAC circuit. Mounts to standard single-gang or 4-inch octagonal electrical boxes. For outdoor installations, pair with the Kidde 449 weatherproof back box (ordered separately).

Specifications

SKUKD-439D-10AW
BrandKidde Commercial
Form factor10" (250mm) vibrating fire alarm bell, underdome type
Power input20-24 VDC
Current draw0.085 A
Sound output86 dB at 10 ft (3m) per UL 464
PolarizationDiode
Gong materialAlloy steel
FinishGray
MountingWall or ceiling, fits standard single-gang or 4" octagonal box
Weather ratingIndoor standard; weatherproof with 449 back box
ComplianceUL Listed (S218, S2202), FM Approved, MEA Approved (7136-1657:0150), CSFM Listed (7130-1657:0150)

Documents and resources

FAQs

Does this bell work with supervised NAC circuits?
Yes. The 439D-10AW is diode polarized, allowing it to operate on supervised Notification Appliance Circuits without interfering with end-of-line circuit supervision.
Can this bell be installed outdoors?
Yes, when paired with the Kidde 449 outdoor back box (ordered separately). The 449 provides weatherproof protection for exterior wall or ceiling applications.
What electrical box does this mount to?
Standard single-gang or 4-inch octagonal electrical boxes. Wall or ceiling mount.
What voltage does this bell require?
20-24 VDC from the fire alarm control panel's NAC circuit. Current draw is 0.085 A.
Is this bell UL Listed?
Yes. UL Listed under S218 and S2202, FM Approved, MEA Approved (7136-1657:0150), and California State Fire Marshal Listed (7130-1657:0150).
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