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  • Kidde | 6" Fire Alarm Vibrating Bell, Diode Polarized, 83 dB, Red, 24 VDC, Indoor/Outdoor, Wall or Ceiling Mount | 439D-6AW-R
6" Fire Alarm Vibrating Bell, Diode Polarized, 83 dB, Red, 24 VDC, Indoor/Outdoor, Wall or Ceiling Mount
Kidde Commercial

Kidde | 6" Fire Alarm Vibrating Bell, Diode Polarized, 83 dB, Red, 24 VDC, Indoor/Outdoor, Wall or Ceiling Mount | 439D-6AW-R

SKU KD-439D-6AW-R

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The Kidde 439D-6AW-R is a 6-inch vibrating fire alarm bell built for reliable audible notification on commercial fire alarm circuits. Running on 20-24 VDC with a low 0.085A draw, it operates directly off the panel's NAC without additional power supplies or special wiring considerations.

Built for the commercial installer

The underdome bell mechanism and alloy steel gong deliver 83 dB at 10 feet - loud enough to cut through typical commercial ambient noise. Diode polarized for supervised NAC compatibility. FM Approved and UL listed (S218, S2202) with MEA acceptance. Mounts to any standard single-gang box, 4" octagon, or 4" square box with the included mounting plate. For outdoor applications, add the optional Cat. No. 449 weatherproof back box.

Key features

  • 83 dB at 10 ft from a heavy-duty alloy steel gong and vibrating mechanism
  • Low current draw (0.085A) at 20-24 VDC - maximizes devices per NAC circuit
  • Diode polarized for compatibility with supervised fire alarm circuits
  • Mounts on standard single-gang, octagon, or square boxes - no special hardware needed
  • Indoor/outdoor capable with optional Cat. No. 449 weatherproof back box
  • FM Approved, UL listed for fire alarm applications

Mounting

Ships with a mounting plate that fits standard single-gang openings, 3-1/2" or 4" octagon boxes, and 4" square boxes. For weather-exposed locations, the Cat. No. 449 surface-mount weatherproof back box (sold separately) provides a sealed enclosure with gasket.

Specifications

SKUKD-439D-6AW-R
BrandKidde Commercial
Form factor6" (150mm) vibrating fire alarm bell, underdome type
Power input20-24 VDC
Current draw0.085A
Sound output83 dB @ 10 ft (92 dB @ 1 m)
PolarityDiode polarized
Gong materialAlloy steel
FinishRed
MountingStandard single-gang, 3-1/2" or 4" octagon, 4" square box, or Cat. No. 449 weatherproof box
Weather ratingIndoor standard; outdoor with Cat. No. 449 back box
ComplianceFM Approved, UL Listed (S218, S2202), MEA (7136-1657:0150)

Documents and resources

FAQs

Can this bell be used outdoors?
Yes, with the optional Cat. No. 449 weatherproof surface-mount back box (sold separately). The 449 box includes a gasket for weather sealing and mounts the bell in a protected enclosure rated for exterior exposure.
Does this bell work on AC or DC power?
The 439D-6AW-R operates on 20-24 VDC only. It connects directly to the fire alarm panel's NAC circuit. For 120 VAC applications, Kidde offers the 438D series bells.
What mounting boxes does it fit?
Mounts to any standard single-gang opening, 3-1/2" or 4" octagon box, 4" square box, or the Cat. No. 449 weatherproof wall box. A mounting plate is included with the bell.
Is this bell FM Approved?
Yes. The 439D series fire alarm bells carry FM Approval for fire alarm notification applications.
What is the sound output?
83 dB at 10 ft (approximately 92 dB at 1 m). The vibrating mechanism and alloy steel gong produce a loud, resonant tone suitable for commercial fire alarm notification.
How much current does it draw on the NAC?
0.085A at 20-24 VDC. The low current draw allows more devices per NAC circuit, reducing panel and power supply requirements on larger jobs.
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