Start/Stop Button Stops | McMaster-Carr

	Switching Voltage Switching Voltage

120V AC

24V DC

120V DC

	Actuator Style Actuator Style


Push Button	Lever

	Push-Button Style Push-Button Style


Flush	Projecting

Mushroom

	Environment Environment

High-
Pressure
Washdown

Hazardous

	Number of Buttons Number of Buttons

	Switch Action Switch Action

Springs Back (Momentary)

Stays Switched (Maintained)

	Illumination Illumination

Not Illuminated

Illuminated

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

1 Off (Normally Open) and 1
On (Normally Closed)

1 On (Normally Closed)

2 Off (Normally Open)

2 Off (Normally Open) and 2
On (Normally Closed)

2 On (Normally Closed)

	Actuator Color Actuator Color

	Red		Green
	Black		Gray
	White

	Environmental Rating Environmental Rating

	Maximum Voltage Maximum Voltage

600V AC

250V DC

600V DC

	For Panel Cutout Diameter For Panel Cutout Diameter

	Message Message

	Switching Current Switching Current

	Push-Button Shape Push-Button Shape

Round

Oval

Square

	Industry Designation Industry Designation

	Number of Mounting Holes Number of Mounting Holes

	Number of Circuits Controlled per Button Number of Circuits Controlled per Button

	Housing Material Housing Material

Plastic

Aluminum

Stainless Steel

	Actuator Base Material Actuator Base Material

Metal

Plastic

	Actuator Material Actuator Material

Plastic

Metal

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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

RoHS Compliant

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42 Products

Choosing an Electrical Switch

Plastic Enclosed Push-Button Switches

Rated NEMA 4X and 13, all switches resist corrosion and can withstand washdowns and oil/coolant spraying. The contact blocks are rated IP20.

Switches rated IP69K can withstand high-pressure washdowns.

Switches rated NEMA 3S work even in cold temperatures and covered in ice.

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

Two Flush Buttons

Two Flush Buttons
with Red Indicating
Light

Three Flush Buttons

							Conduit		Housing
Actuator Color (Industry Designation)	No. of Circuits Controlled per Button	Switch Starting Position	Switch Action	No. of Terminals per Button	Switching Current @ Voltage	Max. Voltage	Trade Size	Knockout Size	Fasteners Included	No. of Holes	Hole Dia.	Environmental Rating		Each
With Screw Terminals
2 Flush Buttons
1 Green Button with Start (SPST-NO), 1 Red Button with Stop (SPST-NC)	1	1 Off (Normally Open)	Springs Back (Momentary)	2	6 A @ 120 V AC, 0.55 A @ 120 V DC	600V AC 600V DC	__	PG-13.5	No	2	3/16"	NEMA 4X, NEMA 13, IK03, IP69K, IP67, IP66, IP20	0000000	000000
1 Green Button with Vertical Line (SPST-NO), 1 Red Button with Circle (SPST-NC)	1	1 Off (Normally Open)	Springs Back (Momentary)	2	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	1/2	__	No	2	3/16"	NEMA 4X, NEMA 13, NEMA 3S, IP20	0000000	00000
2 Flush Buttons with Red Indicating Light
1 Green Button with Vertical Line (SPST-NO), 1 Red Button with Circle (SPST-NC)	1	1 Off (Normally Open)	Springs Back (Momentary)	2	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	1/2	__	No	2	3/16"	NEMA 4X, NEMA 13, NEMA 3S, IP20	0000000	00000
3 Flush Buttons
1 Green Button with Up Arrow (SPST-NO), 1 Red Button with Circle (SPST-NC),1 Green Button with Down Arrow (SPST-NO)	1	1 Off (Normally Open)	Springs Back (Momentary)	2	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	1/2	__	No	2	3/16"	NEMA 4X, NEMA 13, NEMA 3S, IP20	0000000	00000

Replacement Contact Blocks

For SPST Switches
with Conduit
Connections

For SPST
Switches with
PG Connections

For SPST Switches with Conduit Connections
No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Environmental Rating		Each
1	1 Off (Normally Open)	2	SPST-NO	IP20	0000000	000000
1	1 On (Normally Closed)	2	SPST-NC	IP20	0000000	00000
For SPST Switches with PG Connections
1	1 Off (Normally Open)	2	SPST-NO	IP20	0000000	00000
1	1 On (Normally Closed)	2	SPST-NC	IP20	0000000	00000

Stainless Steel Enclosed Push-Button Switches

With a stainless steel enclosure, these switches are more durable than aluminum and plastic. They're rated NEMA 4X for protection from corrosion and washdowns.

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

Push-Button Switches

One Flush
Button and One
Projecting Button

One Flush
Button and One
Mushroom Button

								Mounting
Message (Actuator Color)	No. of Circuits Controlled per Button	Switch Starting Position	Switch Action	No. of Terminals per Button	Industry Designation	Switching Current @ Voltage	Max. Voltage	Fasteners Included	No. of Holes	Hole Dia.	Environmental Rating		Each
With Screw Terminals
1 Flush Button and 1 Projecting Button
Start (Black), Stop (Red)	2	1 Off (Normally Open) and 1 On (Normally Closed)	Springs Back (Momentary)	4	DPST-1NO/1NC	6 A @ 120 V AC, 5 A @ 24 V DC	600V AC 600V DC	No	4	7/32"	NEMA 4X, IP56	0000000	0000000
1 Flush Button and 1 Mushroom Button
Start (Black), Stop (Red)	2	1 Off (Normally Open) and 1 On (Normally Closed)	Springs Back (Momentary)	4	DPST-1NO/1NC	6 A @ 120 V AC, 5 A @ 24 V DC	600V AC 600V DC	No	4	7/32"	NEMA 4X, IP56	0000000	000000

Contact Blocks

2 Circuit Contact Block

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dp. Behind Panel	Specifications Met		Each
2	1 Off (Normally Open) and 1 On (Normally Closed)	4	DPST-1NO/1NC	6 A @ 120 V AC, 5 A @ 24 V DC	600V AC/600V DC	1 3/4"	UL Listed, CSA Certified	00000000	000000

Aluminum Enclosed Push-Button Switches

More lightweight than steel, these aluminum enclosed switches are rated NEMA 4X for protection from corrosion and washdowns. The push buttons are rated NEMA 13. The enclosures are rated IP66 and IP67, and are ATEX, IECEx, and CSA Certified for use in hazardous locations.

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

Two Buttons

Three Buttons

With Screw Terminals
Actuator Color (Industry Designation)	No. of Circuits Controlled per Button	Switch Starting Position	Switch Action	No. of Terminals per Button	Switching Current @ Voltage	Max. Voltage	Conduit Trade Size	Environmental Rating		Each
2 Buttons
1 Green Button with Vertical Line (SPST-NO), 1 Red Button with Circle (SPST-NC)	1	1 Off (Normally Open)	Springs Back (Momentary)	2	10 A @ 120 V AC, 4 A @ 24 V DC	600V AC 600V DC	1/2	IP66 IP67 NEMA 4X NEMA 13 IEC Zone 0 Groups IIC, IIB, IIA IEC Zone 20 Groups IIIC, IIIB, IIIA NEC Class I Division 2 Groups A, B, C, D NEC Zone 1 Groups IIC, IIB, IIA	0000000	0000000
3 Buttons
1 Green Button with Up Arrow (SPST-NO), 1 Red Button with Circle (SPST-NC), 1 Green Button with Down Arrow (SPST-NO)	1	1 Off (Normally Open)	Springs Back (Momentary)	2	10 A @ 120 V AC, 4 A @ 24 V DC	600V AC 600V DC	1/2	IP66 IP67 NEMA 4X NEMA 13 IEC Zone 0 Groups IIC, IIB, IIA IEC Zone 20 Groups IIIC, IIIB, IIIA NEC Class I Division 2 Groups A, B, C, D NEC Zone 1 Groups IIC, IIB, IIA	0000000	000000

Replacement Contact Blocks

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation		Each
1	1 Off (Normally Open)	2	SPST-NO	0000000	00000
1	1 On (Normally Closed)	2	SPST-NC	0000000	0000

Hazardous Location Enclosed Push-Button Switches

One Flush Button and One Projecting Button

Use these switches where ignitable gas and dust may be present. They're rated for use in hazardous locations.

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

									Mounting
Message (Actuator Color)	No. of Circuits Controlled per Button	Switch Starting Position	Switch Action	No. of Terminals per Button	Industry Designation	Switching Current @ Voltage	Max. Voltage	Conduit Trade Size	Fasteners Included	No. of Holes	Hole Dia.		Each
With Screw Terminals
1 Flush Button and 1 Projecting Button
Start (Green), Stop (Red)	2	1 Off (Normally Open) and 1 On (Normally Closed)	Springs Back (Momentary)	2	DPST-1NO/1NC	10 A @ 120 V AC	600V AC	3/4	No	2	9/32"	0000000	0000000

Metal 22 mm Panel-Mount Push-Button Switches

All switches are rated NEMA 4 and 13. The contact block is rated IP20. Switches include enough contact blocks to control the number of circuits listed.

Flush and Projecting switches are rated IP66.

Additional contact blocks (sold separately) can be added to control more circuits, or replace the included contact block.

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

Flush

Projecting

Round with Screw Terminals— (600V AC/600V DC Max. Voltage)
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Message	Switching Current @ Voltage	Dia.	For Max. No. of Contact Blocks	Choose an Actuator Color	Environmental Rating		Each
Flush
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	Start	6 A @ 120 V AC, 2.5 A @ 24 V DC	1 3/16"	6	Green, White	NEMA 4, NEMA 13, IP66, IP20	00000000	000000
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	Vertical Line	6 A @ 120 V AC, 2.5 A @ 24 V DC	1 3/16"	6	Green, White	NEMA 4, NEMA 13, IP66, IP20	00000000	00000
1	1 On (Normally Closed)	Springs Back (Momentary)	2	SPST-NC	Circle	6 A @ 120 V AC, 2.5 A @ 24 V DC	1 3/16"	6	Red	NEMA 4, NEMA 13, IP66, IP20	00000000	00000
1	1 On (Normally Closed)	Springs Back (Momentary)	2	SPST-NC	Stop	6 A @ 120 V AC, 2.5 A @ 24 V DC	1 3/16"	6	Red	NEMA 4, NEMA 13, IP66, IP20	00000000	00000
Projecting
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	Vertical Line	6 A @ 120 V AC, 2.5 A @ 24 V DC	1 3/16"	6	White	NEMA 4, NEMA 13, IP66, IP20	00000000	00000
1	1 On (Normally Closed)	Springs Back (Momentary)	2	SPST-NC	Circle	6 A @ 120 V AC, 2.5 A @ 24 V DC	1 3/16"	6	Black, Red	NEMA 4, NEMA 13, IP66, IP20	00000000	00000
1	1 On (Normally Closed)	Springs Back (Momentary)	2	SPST-NC	Stop	6 A @ 120 V AC, 2.5 A @ 24 V DC	1 3/16"	6	Black, Red	NEMA 4, NEMA 13, IP66, IP20	00000000	00000

Contact Blocks

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Environmental Rating		Each
1	1 Off (Normally Open)	2	SPST-NO	IP20	00000000	00000
1	1 On (Normally Closed)	2	SPST-NC	IP20	00000000	00000

30 mm Multifunction Panel-Mount Push-Button Switches

Save space on a panel by using one switch to perform multiple functions. These switches are rated NEMA 4X and 13 for protection from corrosion, washdowns, and oil/coolant spraying. They include enough contact blocks to control the number of circuits listed.

Illuminated switches have the message "Motor Run," which lights up in red when equipment is started.

Note: If wiring the switch and the bulb to the same circuit, the circuit voltage must not exceed bulb voltage.

Additional contact blocks (sold separately) can be added to control more circuits, or replace the included contact block.

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

Metal Base with Screw Terminals and Push Reset
No. of Circuits Controlled	Switch Starting Position	No. of Buttons	Message (Actuator Color)	Switch Action	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dp. Behind Panel	For Max. No. of Contact Blocks	Choose a Bulb Voltage		Each
2	1 Off (Normally Open) and 1 On (Normally Closed)	2	Start (Green), Stop (Red)	Stays Switched (Maintained)	4	DPST-1NO/1NC	6 A @ 120 V AC, 5.7 A @ 24 V DC	250V DC 600V AC	1 11/16"	8	__	0000000	0000000
Metal Base with Screw Terminals—Illuminated
2	1 Off (Normally Open) and 1 On (Normally Closed)	2	Start (Green), Motor Run (Red), Stop (Red)	Springs Back (Momentary)	6	DPST-1NO/1NC	6 A @ 120 V AC, 5.7 A @ 24 V DC	250V DC 600V AC	1 11/16"	6	24V AC/24V DC, 120V AC/120V DC	0000000	000000

Contact Blocks

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation		Each
1	1 Off (Normally Open)	2	SPST-NO	0000000	000000
1	1 On (Normally Closed)	2	SPST-NC	0000000	00000

22 mm Panel-Mount Build-Your-Own Plastic Switches

Choose an actuator and contact block to make your own switch. Actuators are rated NEMA 3S, 4X and 13 for protection from dust, outdoor environments, corrosion, oil, and washdowns. Use legend plates (not included) to label switches. BACO Controls switches are only compatible with BACO manufactured legend plates.

Illuminated push-button actuators require a contact block with a bulb holder. If wiring the switch and the bulb to the same circuit, the circuit voltage must not exceed bulb voltage.

Contact blocks with mounting latch accept additional contact blocks to control more circuits.

Mounting tools make it easier to install switches in crowded panels.

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

Push-Button Actuators

Oval Flush

Oval Flush
Switch Action	Message	Ht.	Wd.	For Max. No. of Contact Blocks	Environmental Rating	Specifications Met	Manufacturer	Actuator Color		Each
Springs Back (Momentary)	Start/Stop	2 1/8"	1 3/16"	4	NEMA 3S, NEMA 4X, NEMA 13, IP66, IK05	UL Recognized Component, C-UL Recognized Component, UL 508	BACO Controls	Green/Red	0000000	000000

Mounting Tool

0000000

Each

00000

Illuminated Push-Button Actuators

Oval Flush

Oval Flush
Switch Action	Message	Ht.	Wd.	For Max. No. of Contact Blocks	Environmental Rating	Specifications Met	Manufacturer	Actuator Color		Each
Springs Back (Momentary)	Start/Stop	2 1/8"	1 3/16"	4	NEMA 3S, NEMA 4X, NEMA 13, IP66, IK05	UL Recognized Component, C-UL Recognized Component, UL 508	BACO Controls	Green/Red	0000000	000000

Mounting Tool

0000000

Each

00000

Contact Blocks with Mounting Latch

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dp. Behind Panel	Wire Connection Type	Environmental Rating	Specifications Met		Each
1	1 Off (Normally Open)	2	SPST-NO	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	1 11/16"	Screw Terminals	IP20	UL Listed, C-UL Listed, CE Marked	0000000	00000
1	1 On (Normally Closed)	2	SPST-NC	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	1 11/16"	Screw Terminals	IP20	UL Listed, C-UL Listed, CE Marked	0000000	0000
2	2 Off (Normally Open)	4	DPST-NO	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	1 11/16"	Screw Terminals	IP20	UL Listed, C-UL Listed, CE Marked	0000000	00000
2	1 Off (Normally Open) and 1 On (Normally Closed)	4	DPST-1NO/1NC	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	1 11/16"	Screw Terminals	IP20	UL Listed, C-UL Listed, CE Marked	0000000	00000
2	2 On (Normally Closed)	4	DPST-NC	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	1 11/16"	Screw Terminals	IP20	UL Listed, C-UL Listed, CE Marked	0000000	00000
4	2 Off (Normally Open) and 2 On (Normally Closed)	8	4PST-2NO/2NC	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	2"	Screw Terminals	IP20	UL Listed, C-UL Listed, CE Marked	0000000	00000

Replacement Contact Retaining Clip

000000

Each

00000

Contact Blocks

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Environmental Rating	Specifications Met		Each
1	1 Off (Normally Open)	2	SPST-NO	IP20	UL Listed, C-UL Listed, CE Marked	000000	00000
1	1 On (Normally Closed)	2	SPST-NC	IP20	UL Listed, C-UL Listed, CE Marked	000000	0000

Hazardous Location Enclosed Lever Switches

Use these switches where ignitable gas, dust, and fibers may be present. They're UL and C-UL listed for hazardous locations.

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

									Mounting
Actuator Color	Message (Switch Position)	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Fasteners Included	No. of Holes	Hole Dia.		Each
3 Positions
With Screw Terminals
Gray	Hand (Left), Off (Center), Auto (Right)	2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	10 A @ 120 V AC	600V AC	No	2	5/16"	0000000	0000000