Door Bell Switches | McMaster-Carr

	Push-Button Style Push-Button Style


Projecting	Flush

	Switching Voltage Switching Voltage

	Number of Terminals Number of Terminals

	Push-Button Shape Push-Button Shape

Round

Rectangular

	Actuator Material Actuator Material

Plastic

Metal

	Illumination Illumination

Not Illuminated

Illuminated

	Number of Circuits Controlled Number of Circuits Controlled

	Maximum Voltage Maximum Voltage

	For Panel Cutout Diameter For Panel Cutout Diameter

	Environment Environment

Damp

Dusty

Washdown

	Actuator Color Actuator Color

	White
	Black
	Gold

	Switching Current Switching Current

10A

	Housing Color Housing Color

	Gold		Gray
	White		Black

	Housing Material Housing Material

Brass

Aluminum

Plastic

	Mount Type Mount Type

Hex Nut

Snap In

	Number of Mounting Holes Number of Mounting Holes

	Mounting Hole Diameter Mounting Hole Diameter

1/8"

3/16"

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

DFARS Specialty Metals
COTS-Exempt

	Housing Depth Housing Depth

5/8"

3/4"

1 5/16"

	Housing Diameter Housing Diameter

1 3/4"

2 1/4"

2 1/2"

	Diameter Diameter

3/4"

	Depth Behind Panel Depth Behind Panel

	For Maximum Panel Thickness For Maximum Panel Thickness

21 Products

Choosing an Electrical Switch

These familiar push-button switches mount to flat surfaces.

Switches rated IP65 are protected against dust and low-pressure jets of water.

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

									Housing
Style	Actuator Color	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Ht.	Wd.	Dp.	Material	Color	Mounting Fasteners Included	Environmental Rating		Each
Metal Actuator with Screw Terminals
Round
A	Gold	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	2 1/2"	__	__	1 5/16"	Brass	Gold	Yes	IP65	00000000	000000
Plastic Actuator with Screw Terminals
Round
A	Black	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	1 3/4"	__	__	5/8"	Brass	Gold	Yes	__	0000000	0000
A	Black	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	2 1/4"	__	__	5/8"	Brass	Gold	Yes	__	0000000	0000
Rectangular
B	Black	2	1 Off (Normally Open)	Springs Back (Momentary)	4	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	__	4 3/4"	1 5/8"	3/4"	Brass	Gold	Yes	__	0000000	00000
B	Black	3	1 Off (Normally Open)	Springs Back (Momentary)	6	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	__	7"	1 5/8"	5/8"	Brass	Gold	Yes	__	0000000	00000
C	Black	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	__	2 3/4"	1"	3/4"	Anodized Aluminum	Gold	Yes	__	0000000	00000
C	Black	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	__	2 3/4"	1"	3/4"	Anodized Aluminum	Gray	Yes	__	0000000	00000
D	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	__	2 3/4"	3/4"	5/8"	Plastic	Black	Yes	__	0000000	0000
D	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	__	2 3/4"	3/4"	5/8"	Plastic	Gold	Yes	__	0000000	0000
D	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	__	2 3/4"	3/4"	5/8"	Plastic	Gray	Yes	__	0000000	0000
D	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 30 V AC/30 V DC	30V AC 30V DC	__	2 3/4"	3/4"	5/8"	Plastic	White	Yes	__	0000000	0000
Plastic Actuator with Screw Terminals—Illuminated
Rectangular
C	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 16 V AC/16 V DC	16V DC 16V AC	__	2 3/4"	1"	3/4"	Anodized Aluminum	Gold	Yes	__	0000000	00000
C	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 16 V AC/16 V DC	16V DC 16V AC	__	2 3/4"	1"	3/4"	Anodized Aluminum	Gray	Yes	__	00000000	00000
D	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 16 V AC/16 V DC	16V DC 16V AC	__	2 3/4"	3/4"	5/8"	Plastic	Black	Yes	__	0000000	00000
D	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 16 V AC/16 V DC	16V DC 16V AC	__	2 3/4"	3/4"	5/8"	Plastic	Gold	Yes	__	0000000	00000
D	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 16 V AC/16 V DC	16V DC 16V AC	__	2 3/4"	3/4"	5/8"	Plastic	Gray	Yes	__	0000000	00000
D	White	1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	3 A @ 16 V AC/16 V DC	16V DC 16V AC	__	2 3/4"	3/4"	5/8"	Plastic	White	Yes	__	0000000	00000

Low-Voltage 16 mm Panel-Mount Push-Button Switches

Flush with Hex Nut

Projecting with Hex Nut

Projecting Snap-In

Operate low-voltage devices such as doorbells and buzzers.

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

Metal Base with Screw Terminals
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Actuator Color	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel		Each
Flush with Hex Nut
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	White	10 A @ 24 V AC, 2 A @ 24 V DC	48V AC 48V DC	3/4"	7/8"	00000000	000000
Projecting with Hex Nut
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	White	10 A @ 24 V AC, 2 A @ 24 V DC	48V AC 48V DC	3/4"	15/16"	00000000	00000
Projecting Snap In
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	White	3 A @ 30 V AC/30 V DC	30V AC 30V DC	3/4"	13/16"	00000000	0000

Low-Voltage 19 mm Panel-Mount Push-Button Switches

Operate low-voltage devices that require less than 48 volts, such as doorbells and buzzers. These switches have one input terminal and three output terminals to control up to three devices at once.

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

Metal Base with Screw Terminals
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Actuator Color	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel		Each
Snap In
1	1 Off (Normally Open)	Springs Back (Momentary)	4	SPST-NO	Black	4 A @ 24 V AC, 1 A @ 24 V DC	48V AC 48V DC	1"	1 1/16"	00000000	000000

Choosing an Electrical Switch

Doorbell-Style Push-Button Switches

Low-Voltage 16 mm Panel-Mount Push-Button Switches

Low-Voltage 19 mm Panel-Mount Push-Button Switches