24 VAC Audible Signals | McMaster-Carr

	Voltage Voltage

24V AC

120V AC

24V DC

	Audible Signal Type Audible Signal Type

Buzzer

Horn

Bell

	Volume Volume

	Current Current

	Sound Pattern Sound Pattern

Continuous

Pulse

	Volume Control Volume Control

Fixed

Adjustable

	Mount Type Mount Type

Screw

Panel

	Signal Type Signal Type

Audible Alarm

Signal Light with Audible
Alarm

	Electrical Connection Type Electrical Connection Type

Wire Leads

Screw Terminals

Lug Terminals

	Environment Environment

	Material Material

	Fasteners Included Fasteners Included

Yes

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Width Width

	Depth Depth

	Height Height

	Diameter Diameter

	Number of Wire Leads Number of Wire Leads

	Specifications Met Specifications Met

CFM

CSA

	Number of Mounting Holes Number of Mounting Holes

	Mounting Hole Diameter Mounting Hole Diameter

3/16"

1/4"

5/16"

	Environmental Rating Environmental Rating

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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42 Products

About Sound Levels

To choose an alarm or speaker that’s loud enough, first determine the decibel (dB) rating of background noise.

Mount Style A and B buzzers using outlet boxes (sold separately).

With 2 Wire Leads
	Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included	Includes	For Panel Cutout Height	For Panel Cutout Width	UL File Number		Each
A	24V AC	0.63 A @ 24 V AC	78-103 dBA @ 10 ft.	Continuous	6 1/2"	6 1/2"	1 1/4"	Zinc	Yes	Mounting Plate	4 3/16"	4 3/16"	E4186	0000000	0000000
A	120V AC	0.13 A @ 120 V AC	78-103 dBA @ 10 ft.	Continuous	6 1/2"	6 1/2"	1 1/4"	Zinc	Yes	Mounting Plate	4 3/16"	4 3/16"	E4186	0000000	000000
With 4 Wire Leads
C	24V DC	0.22 A @ 24 V DC	99 dBA @ 10 ft.	Continuous	4 1/8"	4 1/8"	2 7/8"	Polycarbonate	Yes	Mounting Plate	__	__	__	0000000	000000
With Screw Terminals
B	24V AC	0.63 A @ 24 V AC	78-103 dBA @ 10 ft.	Continuous	5"	5"	2 1/8"	Zinc	Yes	Mounting Plate	__	__	E4186	0000000	000000

Outlet Box for Style B	00000000	Each	00000
Outlet Box for Style A	0000000	Each	00000

Washdown Buzzers

Buzzers meet NEMA 4X for protection and corrosion resistance in washdown environments.

Panel Mount

With 2 Wire Leads
Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	For Panel Cutout Ht.	For Panel Cutout Wd.	Fasteners Included	Environmental Rating		Each
24V AC	0.9 A @ 24 V AC	100 dBA @ 10 ft.	Continuous	5 5/8"	5 5/8"	2 3/8"	Zinc	3 1/8"	3 1/8"	Yes	NEMA 12, NEMA 4X	0000000	0000000

Surface Mount

With 2 Wire Leads
Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Conduit Size	Thread Type	Fasteners Included	Includes	Environmental Rating		Each
24V AC	0.9 A @ 24 V AC	100 dBA @ 10 ft.	Continuous	5 5/8"	5 5/8"	2 3/8"	Zinc	3/4	NPT	Yes	Outlet Box	NEMA 12, NEMA 4X	0000000	0000000

Multiple-Tone Buzzers

With 2 Wire Leads
Voltage	Current	Volume	Environment	Sound Pattern	Ht.	Wd.	Dp.	Material	Fasteners Included	Specifications Met		Each
24V AC 24V DC	0.07 A @ 24 V DC 0.22 A @ 24 V AC	88 dBA @ 10 ft.	Outdoor	Continuous	4 1/2"	4 1/2"	3 1/2"	Plastic	Yes	C-UL Listed, California Fire Marshal Approved, UL Listed	0000000	0000000

Outdoor Outlet Box	00000000	Each	000000
Outlet Box	00000000	Each	0000

Adjustable-Volume Multiple-Tone Horns

												Mounting Holes
Voltage	Current	Volume	Sound Pattern	Ht.	Wd.	Dp.	Material	Conduit Size	Thread Type	Gender	Fasteners Included	No. of	Dia.		Each
With Screw Terminals
24V AC 24V DC	1.1 A @ 24 V AC 1.1 A @ 24 V DC	0-110 dBA @ 10 ft.	Continuous Pulse	12 1/2"	8"	8 1/2"	Aluminum	1/2	NPT	Female	No	2	3/16"	0000000	0000000

Bells

Surface mount using an outlet box. For outdoor bells, the outlet box is included.

Bells

							Mounting Holes
Voltage	Current	Volume	Sound Pattern	Dia.	Material	Fasteners Included	No. of	Dia.	Specifications Met		Each
With 2 Wire Leads
24V AC	0.35 A @ 24 V AC	90 dB @ 10 ft. 70 dB @ 100 ft.	Continuous	4 1/4"	Steel	No	4	1/4"	C-UL Listed, UL Listed	0000000	0000000
24V AC	0.35 A @ 24 V AC	92 dB @ 10 ft. 72 dB @ 100 ft.	Continuous	6"	Steel	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.35 A @ 24 V AC	94 dB @ 10 ft. 74 dB @ 100 ft.	Continuous	8"	Steel	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.35 A @ 24 V AC	96 dB @ 10 ft. 76 dB @ 100 ft.	Continuous	10"	Steel	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000

Bell Guard	0000000	Each	000000
Outlet Box	00000000	Each	0000

Bells for Outdoor Use

										Mounting Holes
Voltage	Current	Volume	Sound Pattern	Dia.	Material	Conduit Size	Thread Type	Gender	Fasteners Included	No. of	Dia.	Specifications Met		Each
With 2 Wire Leads
24V AC	0.35 A @ 24 V AC	90 dB @ 10 ft. 70 dB @ 100 ft.	Continuous	4 1/4"	Steel	1/2	NPT	Female	No	2	5/16"	C-UL Listed, UL Listed	0000000	0000000
24V AC	0.35 A @ 24 V AC	92 dB @ 10 ft. 72 dB @ 100 ft.	Continuous	6"	Steel	1/2	NPT	Female	No	2	5/16"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.35 A @ 24 V AC	94 dB @ 10 ft. 74 dB @ 100 ft.	Continuous	8"	Steel	1/2	NPT	Female	No	2	5/16"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.35 A @ 24 V AC	96 dB @ 10 ft. 76 dB @ 100 ft.	Continuous	10"	Steel	1/2	NPT	Female	No	2	5/16"	C-UL Listed, UL Listed	0000000	000000

Bell Guard

0000000

Each

000000

Surface-Mount Miniature Buzzers

											Mounting Holes
Style	Voltage	Current	Volume	Sound Pattern	Dia.	Ht.	Wd.	Dp.	Material	Fasteners Included	No. of	Thread Size	Includes		Each
With Lug Terminals
A	24V AC	0.6 A @ 24 V AC	74 dBA @ 1 m	Continuous	__	1 1/4"	1"	7/8"	Plastic	No	1	6-32	Mounting Bracket	00000000	000000
With 2 Wire Leads
D	24V AC	0.2 A @ 24 V AC	86 dBA @ 10 ft.	Continuous	2 1/8"	__	__	1 1/4"	Steel	No	1	8-32	Mounting Bracket	0000000	00000

Surface-Mount Buzzers

Surface mount using an outlet box (sold separately).

With Screw Terminals
Voltage	Current	Volume	Sound Pattern	Dia.	Dp.	Material	Fasteners Included	Includes	Specifications Met		Each
24V AC	0.25 A @ 24 V AC	70 dBA @ 10 ft.	Continuous	5 1/8"	2 1/4"	Epoxy-Coated Steel	Yes	Mounting Plate	FM Approved, UL Listed	000000000	0000000

Outlet Box

00000000

Each

00000

Flashing Lights with Bell

Surface mount using an outlet box. For outdoor bells, the outlet box is included.

For technical drawings and 3-D models, click on a part number.

Lights

								Mounting Holes
Voltage	Current	Volume	Sound Pattern	Dia.	Material	Light Color	Fasteners Included	No. of	Dia.	Specifications Met		Each
With 2 Wire Leads
24V AC	0.4 A @ 24 V AC	90 dB @ 10 ft. 70 dB @ 100 ft.	Continuous	4 1/4"	Steel	Amber	No	4	1/4"	C-UL Listed, UL Listed	0000000	0000000
24V AC	0.4 A @ 24 V AC	90 dB @ 10 ft. 70 dB @ 100 ft.	Continuous	4 1/4"	Steel	Red	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	92 dB @ 10 ft. 72 dB @ 100 ft.	Continuous	6"	Steel	Amber	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	92 dB @ 10 ft. 72 dB @ 100 ft.	Continuous	6"	Steel	Red	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	94 dB @ 10 ft. 74 dB @ 100 ft.	Continuous	8"	Steel	Amber	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	94 dB @ 10 ft. 74 dB @ 100 ft.	Continuous	8"	Steel	Red	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	96 dB @ 10 ft. 76 dB @ 100 ft.	Continuous	10"	Steel	Amber	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	96 dB @ 10 ft. 76 dB @ 100 ft.	Continuous	10"	Steel	Red	No	4	1/4"	C-UL Listed, UL Listed	0000000	000000

Bell Guard	0000000	Each	000000
Outlet Box	00000000	Each	0000

Lights for Outdoor Use

											Mounting Holes
Voltage	Current	Volume	Sound Pattern	Dia.	Material	Light Color	Conduit Size	Thread Type	Gender	Fasteners Included	No. of	Dia.	Specifications Met		Each
With 2 Wire Leads
24V AC	0.4 A @ 24 V AC	90 dB @ 10 ft. 70 dB @ 100 ft.	Continuous	4 1/4"	Steel	Amber	1/2	NPT	Female	No	2	1/4"	C-UL Listed, UL Listed	0000000	0000000
24V AC	0.4 A @ 24 V AC	90 dB @ 10 ft. 70 dB @ 100 ft.	Continuous	4 1/4"	Steel	Red	1/2	NPT	Female	No	2	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	92 dB @ 10 ft. 72 dB @ 100 ft.	Continuous	6"	Steel	Amber	1/2	NPT	Female	No	2	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	92 dB @ 10 ft. 72 dB @ 100 ft.	Continuous	6"	Steel	Red	1/2	NPT	Female	No	2	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	94 dB @ 10 ft. 74 dB @ 100 ft.	Continuous	8"	Steel	Amber	1/2	NPT	Female	No	2	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	94 dB @ 10 ft. 74 dB @ 100 ft.	Continuous	8"	Steel	Red	1/2	NPT	Female	No	2	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	96 dB @ 10 ft. 76 dB @ 100 ft.	Continuous	10"	Steel	Amber	1/2	NPT	Female	No	2	1/4"	C-UL Listed, UL Listed	0000000	000000
24V AC	0.4 A @ 24 V AC	96 dB @ 10 ft. 76 dB @ 100 ft.	Continuous	10"	Steel	Red	1/2	NPT	Female	No	2	1/4"	C-UL Listed, UL Listed	0000000	000000

Bell Guard

0000000

Each

000000

Replacement Incandescent Bulbs

	Bulb
	Shape Number	Dia.	Overall Lg.	Voltage	Wattage	Brightness, lumens	Bulb Material	Color	Rated Life, hrs.		Each
For 24V AC Voltage	T3 1/4	7/16"	1 3/16"	28V AC	2.4W	36	Glass	Clear	7,000	0000000	000000