NEMA 12K Switches | McMaster-Carr

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	Environment Environment

Corrosive

Damp

Dusty

High-Pressure Washdown

Oily

Outdoor

Washdown

	Electrical Phase Electrical Phase

Three

	Environmental Rating Environmental Rating	Show

NEMA 12K

	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

	Switching Voltage Switching Voltage

600V AC

	Switching Current Switching Current

30A

	Power Power

7 1/2 hp @ 240 V AC

	Specifications Met Specifications Met

CSA

UL 94

	Switch Starting Position Switch Starting Position

3 Off (Normally Open)

	Number of Mounting Holes Number of Mounting Holes

	Number of Circuits Controlled Number of Circuits Controlled

	Switch Action Switch Action

Stays Switched (Maintained)

	Reversing Capability Reversing Capability

Nonreversing

	System of Measurement System of Measurement

Inch

	Height Height

7.6"

	Housing Color Housing Color

	Gray

	Housing Material Housing Material

Plastic

	Industry Designation Industry Designation

3PST-NO

	Switch Type Switch Type

Motor Control

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

DFARS Specialty Metals
COTS-Exempt

	Depth Depth

4.1"

	Width Width

5.1"

	Mounting Hole Diameter Mounting Hole Diameter

0.19"

	Wire Connection Type Wire Connection Type

	Screw Terminals

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Choosing an Electrical Switch

About Motor Switches and Starters

Rated NEMA 4X and 12K, these switches are protected from corrosion, washdowns, and oil/coolant dripping. Use them to turn motors on and off, or with other circuits such as lighting and electric heat circuits. They do not provide overload protection.

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

				Switching
No. of Circuits Controlled	Electrical Phase (hp)	Switch Starting Position	Industry Designation	Current, A	Voltage	Ht.	Wd.	Wire Connection Type	Environmental Rating	Specifications Met		Each
Stays Switched (Maintained)

3	Three (7 1/2 hp @ 240 V AC)	3 Off (Normally Open)	3PST-NO	30	600V AC	7.6"	5.1"	Screw Terminals	NEMA 4X, IP69K, NEMA 12K	UL Listed, C-UL Listed, CSA Certified, UL 746C, UL 94 5VA	0000000	0000000

Choosing an Electrical Switch

About Motor Switches and Starters

Washdown Enclosed Motor Switches