NEMA 2 Switches | McMaster-Carr

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	Reset Type Reset Type

Push-Pull

Push-Twist

	System of Measurement System of Measurement

Inch

	For Panel Cutout Diameter For Panel Cutout Diameter

1 3/16"

30 mm

	Push-Button Style Push-Button Style

	Mushroom

	Switching Voltage Switching Voltage

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

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

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

1 On (Normally Closed)

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

2 On (Normally Closed)

	Actuator Style Actuator Style


Push Button	Foot Pedal

	Illumination Illumination

Not Illuminated

Illuminated

	Switch Action Switch Action

Stays Switched (Maintained)

Springs Back (Momentary)

	Actuator Base Material Actuator Base Material

Plastic

Metal

	Environment Environment

	Actuator Color Actuator Color

	Red

	Number of Circuits Controlled Number of Circuits Controlled

	Environmental Rating Environmental Rating	Show

NEMA 2

	Environmental Rating Environmental Rating	Hide

Warning: Products have one, but not necessarily all, of the selected characteristics.

IEC Zone 0 Groups IIC

IEC Zone 0 Groups IIC,
IIB, IIA

IEC Zone 0 Groups IIC,
IIB, IIA (Associated
Apparatus)

IEC Zone 1 Groups IIC,
IIB, IIA

IEC Zone 2 Groups IIC,
IIB, IIA

IEC Zone 20 Groups
IIIC, IIIB, IIIA

IEC Zone 20 Groups IIIC,
IIIB, IIIA (Associated
Apparatus)

IEC Zone 21 Groups
IIIC, IIIB, IIIA

NEC Class I Division 2
Groups A, B

NEC Class I Division 2
Groups A, B, C, D

NEC Class I Division 2
Groups B, C, D

NEC Class I Divisions
1, 2 Group D

NEC Class I Divisions
1, 2 Groups A, B, C, D

NEC Class I Divisions
1, 2 Groups B, C, D

NEC Class I Divisions
1, 2 Groups C, D

NEC Class II Division 2
Groups F, G

NEC Class II Divisions
1, 2 Groups E, F, G

NEC Class II Divisions
1, 2 Groups F, G

NEC Class III
Divisions 1, 2

NEC Zone 1 Group IIA

NEC Zone 1 Groups
IIB, IIA

NEC Zone 1 Groups
IIC, IIB, IIA

NEC Zone 2 Groups
IIB, IIA

UL Class I, Division 1 &
2, Group B

UL Class I, Division 1 &
2, Group C

UL Class I, Division 1 &
2, Group D

UL Class I, Group C

UL Class I, Group D

UL Class II, Division 1 &
2, Group E

UL Class II, Division 1 &
2, Group F

UL Class II, Division 1 &
2, Group G

	Number of Terminals Number of Terminals

	Maximum Voltage Maximum Voltage

600V AC

250V DC

	Switching Current Switching Current

20A

	Industry Designation Industry Designation

	Push-Button Shape Push-Button Shape

Round

	Wire Connection Type Wire Connection Type

	Screw Terminals

	Specifications Met Specifications Met

CE Marked

CSA

	Switch Type Switch Type

Manual

	Mounting Location Mounting Location

Panel

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

DFARS Specialty Metals
COTS-Exempt

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34 Products

Choosing an Electrical Switch

About Hazardous Location Environmental Ratings

30 mm Emergency Stop Panel-Mount Push-Button Switches

Immediately cut power with a single push. These switches are rated for protection from low-pressure streams of water and oil/coolant spraying. They have positive force contacts that will open a circuit when actuated even if a spring fails or the contacts stick. Switches include enough contact blocks to control the number of circuits listed.

Turn push-twist switches back on by twisting the button and push-pull switches by pulling it. Add an optional lockout on either kind to cover the button and prevent changes its position.

Note: Illuminated switches include a bulb. 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 to replace the included contact block.

Push-Pull Switch

Push-Twist Switch

Illuminated Push-Pull Switch

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	For Max. No. of Contact Blocks	Choose a Bulb Voltage		Each
Push-Pull Reset
1	1 On (Normally Closed)	Stays Switched (Maintained)	2	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
Push-Twist Reset
1	1 On (Normally Closed)	Stays Switched (Maintained)	2	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	00000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
Metal Base with Screw Terminals—Illuminated
Push-Pull Reset
1	1 Off (Normally Open)	Stays Switched (Maintained)	4	SPST-NO	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 1/16"	4	24V AC/24V DC, 120V AC/120V DC	0000000	000000
1	1 On (Normally Closed)	Stays Switched (Maintained)	4	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 1/16"	4	240V AC/240V DC	00000000	000000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	6	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 15/16"	4	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	6	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 15/16"	4	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000
Plastic Base with Screw Terminals
Push-Pull Reset
1	1 On (Normally Closed)	Stays Switched (Maintained)	2	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	00000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
Push-Twist Reset
1	1 On (Normally Closed)	Stays Switched (Maintained)	2	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	00000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
Plastic Base with Screw Terminals—Illuminated
Push-Pull Reset
1	1 Off (Normally Open)	Stays Switched (Maintained)	4	SPST-NO	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 1/16"	4	24V AC/24V DC, 120V AC/120V DC	0000000	000000
1	1 On (Normally Closed)	Stays Switched (Maintained)	4	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 1/16"	4	240V AC/240V DC	00000000	000000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	6	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 15/16"	4	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	6	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 15/16"	4	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000

Contact Blocks for Switches with Push-Pull and Push-Twist Reset

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation		Each
1	1 Off (Normally Open)	2	SPST-NO	00000000	000000
1	1 On (Normally Closed)	2	SPST-NC	00000000	00000

Replacement Actuators

For Switches with Push-Pull Reset
Actuator Clarity	Actuator Color	Bulb Type	Bulb Color	Choose a Bulb Voltage		Each
Metal Base—Not Illuminated
Opaque	Red	__	__	__	00000000	000000
Metal Base—Illuminated
Clear	Red	LED	Red	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000
Plastic Base—Not Illuminated
Opaque	Red	__	__	__	00000000	00000
Plastic Base—Illuminated
Clear	Red	LED	Red	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000
For Switches with Push-Twist Reset
Metal Base—Not Illuminated
Opaque	Red	__	__	__	00000000	00000
Plastic Base—Not Illuminated
Opaque	Red	__	__	__	00000000	00000

Replacement Bulbs

Replacement Bulb

For Switches with Push-Pull Reset
Bulb Voltage	Bulb Color	Bulb Type		Each
120V AC, 120V DC	Red	LED	00000000	000000
For Switches with 24V AC/24V DC Bulb
24V AC, 24V DC	Red	LED	00000000	00000

Optional Lockouts for Switches with Push-Pull and Push-Twist Reset

For Maximum Padlock Shackle Diameter		Each
1/4"	00000000	000000

Hazardous Location Foot Switches

With One Pedal

With Two Pedals

These switches are rated for environments where hazardous material is present. Press the pedal with your foot for hands-free operation. They have an oversized guard that accommodates bulky footwear.

Hazardous location environmental ratings indicate whether manufacturers have included safety features in products to facilitate their safe use in a hazardous environment. Before selecting a product for a hazardous location, ensure it is rated for your environment. See About Hazardous Location Environmental Ratings.

					Mounting
No. of Circuits Controlled	Switch Starting Position	Switch Action	Industry Designation	Switching Current @ Voltage	Fasteners Included	No. of Holes	Hole Dia.	Environmental Rating		Each
1 Speed with Screw Terminals
Aluminum Housing with 1 Pedal, Oversized Guard, and Back Pivot
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	20 A @ 125 V AC/250 V AC	No	6	0.28"	NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9	0000000	0000000
2	2 Off (Normally Open) or 2 On (Normally Closed)	Springs Back (Momentary)	DPDT	20 A @ 125 V AC/250 V AC	No	6	0.28"	NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9	0000000	000000
Aluminum Housing with 2 Pedals, Oversized Guard, and Back Pivot
2	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	20 A @ 125 V AC/250 V AC	No	6	0.28"	NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9	0000000	000000