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  • Kidde | 10-Inch Red Fire Alarm Vibrating Bell, Diode Polarized, 24 VDC, 95 dB, Indoor/Outdoor, Wall/Ceiling Mount | 439D-10AW-R
10-Inch Red Fire Alarm Vibrating Bell, Diode Polarized, 24 VDC, 95 dB, Indoor/Outdoor, Wall/Ceiling Mount
Kidde Commercial

10-Inch Red Fire Alarm Vibrating Bell, Diode Polarized, 24 VDC, 95 dB, Indoor/Outdoor, Wall/Ceiling Mount

SKU KD-439D-10AW-R

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The Kidde 439D-10AW-R is a 10-inch red fire alarm vibrating bell built for commercial and industrial notification circuits. Diode polarized for compatibility with coded NAC systems, it delivers 95 dB at 1 meter - loud enough to cut through warehouse floors, mechanical rooms, and open commercial spaces where audible notification is non-negotiable.

Built for the commercial installer

Alloy steel gong construction handles the abuse of high-traffic and industrial environments. FM Approved and UL Listed (S218, S2202), with MEA acceptance for New York City installations. The mounting plate fits a standard single-gang opening and accepts surface mounting, 3-1/2" or 4" octagon boxes, 4" square boxes, or the Kidde Cat. No. 449 weatherproof back box for outdoor applications.

Key features

  • 95 dB at 1 meter (85 dB at 10 feet) for reliable audible notification in large commercial spaces
  • Diode polarized for coded notification appliance circuit compatibility
  • Indoor/outdoor rated when paired with Cat. No. 449 weatherproof back box
  • Alloy steel gong with heavy-duty underdome mechanism for long-term reliability
  • Standard single-gang mounting plate fits octagon, square, or surface-mount configurations
  • FM Approved, UL Listed, MEA Approved for code-compliant installations nationwide

Mounting options

Wall or ceiling mount. Accepts surface mounting or installs on 3-1/2" octagon, 4" octagon, 4" square boxes, or the Kidde Cat. No. 449 weatherproof wall box for exterior applications.

Specifications

SKUKD-439D-10AW-R
BrandKidde Commercial
Form factor10" (250mm) vibrating fire alarm bell
Gong materialAlloy steel
Mechanism typeHeavy-duty underdome
Operating voltage20-24 VDC
Current draw0.085A
Sound output95 dB at 1m / 85 dB at 10 ft
PolarizationDiode polarized
FinishRed
Gong diameter10" (250mm)
Base width4-5/8" (117mm)
MountingWall or ceiling - surface, 3-1/2" octagon, 4" octagon, 4" square, or Cat. No. 449 weatherproof box
Weather ratingIndoor standard; outdoor with Cat. No. 449 back box
ComplianceFM Approved, UL Listed (S218, S2202), MEA Approved (7136-1657:0150)

Documents and resources

FAQs

Can this bell be used outdoors?
Yes, when paired with the Kidde Cat. No. 449 weatherproof back box. The 449 provides a sealed enclosure rated for outdoor wall-mount installations.
What type of circuit does this bell require?
The 439D-10AW-R is diode polarized for use on coded notification appliance circuits (NAC). It operates on 20-24 VDC and draws 0.085A.
What mounting boxes are compatible?
The mounting plate fits a standard single-gang opening. Compatible with surface mounting, 3-1/2" octagon boxes, 4" octagon boxes, 4" square boxes, and the Kidde Cat. No. 449 weatherproof wall box.
How loud is this bell?
95 dB at 1 meter (85 dB at 10 feet). Suitable for large commercial and industrial spaces where reliable audible notification is required by code.
Is this bell FM Approved and UL Listed?
Yes. FM Approved, UL Listed under categories S218 and S2202, and MEA Approved (7136-1657:0150) for New York City installations.
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