30-Amp Disconnects | McMaster-Carr

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41 Products

Durable Disconnect Switches

Protected by a steel enclosure, these switches withstand tougher conditions than switches in a plastic housing. Also known as safety switches, they have quick-make/quick-break action to eliminate arcing and prolong switch life. They have a lockout to secure in the off position using a padlock (not included).

Maintained Switch About Maintained Switch

Image of Product. Front orientation. Disconnect Switches. Durable Disconnect Switches.

Fuse Holder—Switches with a fuse holder are used where overload protection is needed. When the current exceeds the fuse’s rating, the fuse will blow, interrupting the circuit to prevent the switch from overheating, breaking, or causing a fire. These switches require rejection-style fuse clips when used with UL Class RK1, RK5, or T fuses. Note: Horsepower ratings are based on time-delay fuses installed.

Safety Interlock—Switches with safety interlock keep the door closed when the switch is on and prevent the switch from turning on when the door is open.

Viewing Window—Switches with a viewing window let you see the switch position without opening the enclosure.

	Switches															Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class
	Switching
	Current, amp	Voltage	Switch Designation	Electrical Phase (hp)	For No. of Wires	For Fuse UL Class	Ht.	Wd.	For Max. Padlock Shackle Dia.	Wire Connection	Enclosure Rating	Certification	Specs. Met		Each		Each
Gray Enamel-Coated Steel Housing with Black Actuator







				3 Circuits Controlled with Lockout and Safety Interlock

				30	600V AC/600V DC	3PDT	Single (5 hp @ 240V AC) Single (7 1/2 hp @ 480V AC) Single (10 hp @ 600V AC)	3	—	29 15/16"	12"	3/8"	Tab	NEMA 1	UL Listed	—	1960N4	0000000	———	0




						3 Circuits Controlled with Lockout, Safety Interlock, and Fuse Holder

						30	600V AC/600V DC	3PDT	Single (3 hp @ 480V AC) Three (5 hp @ 480V AC) Three (7 1/2 hp @ 600V AC)	3	RK1, RK5, J, K5, H	38 7/16"	12"	3/8"	Tab	NEMA 1	UL Listed	—	1960N1	00000000	———	0


						Gray Enamel-Coated Steel with Black/Red Actuator







										3 Circuits Controlled with Lockout, Safety Interlock, and Viewing Window

										30	600V AC/600V DC	3PST	Single (10 hp @ 600V AC) Three (30 hp @ 600V AC)	3	—	14 5/8"	7 9/16"	3/8"	Tab	NEMA 1	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K78	000000	———	0




												3 Circuits Controlled with Lockout, Safety Interlock, Fuse Holder, and Viewing Window

												30	600V AC/600V DC	3PST	Three (20 hp @ 600V AC)	3	RK1, RK5, J, K5, H	14 5/8"	7 9/16"	3/8"	Tab	NEMA 1	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K58	000000	7499K111	000000


												30	600V AC/600V DC	3PST	Three (20 hp @ 600V AC)	4	RK1, RK5, J, K5, H	14 5/8"	7 9/16"	3/8"	Tab	NEMA 1	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K73	000000	7499K111	00000


												Gray Powder-Coated Steel Housing with Red Actuator







																2 Circuits Controlled with Lockout, Safety Interlock, and Fuse Holder

																30	240V AC/250V DC	DPST	Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	3	RK1, RK5, K5, H	14 1/4"	6 5/8"	5/16"	Tab	NEMA 1	UL Listed	—	7524K21	000000	7524K414	00000




																		3 Circuits Controlled with Lockout, Safety Interlock, and Fuse Holder

																		30	240V AC/250V DC	3PST	Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	3	RK1, RK5, K5, H	14 1/4"	6 5/8"	5/16"	Tab	NEMA 1	UL Listed	—	7524K11	000000	7524K414	00000




3 Circuits Controlled with Lockout

30	240V AC/250V DC																			3PST	Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	3	—	6 3/8"	4 9/16"	5/16"	Tab	NEMA 1	UL Listed	—	7524K31	00000	———	0

Outdoor Durable Disconnect Switches

All switches have quick-make/quick-break action to eliminate arcing and prolong switch life.

Maintained Switch About Maintained Switch

Image of Product. Front orientation. Disconnect Switches. Outdoor Durable Disconnect Switches.

Enamel-Coated Steel Housing and Powder-Coated Steel Housing—The enclosure is steel, so it withstands tougher conditions than plastic enclosures.

Fuse Holder—Use switches with a fuse holder where overload protection is needed. When the current exceeds the rating of the fuse, it blows. This interrupts the circuit and prevents overheating, damage, and fire. When used with UL Class RK1, RK5, or T fuses, they require rejection-style fuse clips. Note: Horsepower ratings are based on time-delay fuses installed.

Safety Interlock—Switches with safety interlock keep the door closed when the switch is on and prevent the switch from turning on when the door is open.

Viewing Window—Switches with a viewing window let you see the switch position without opening the enclosure.

Lockout—They have a lockout to secure in the off position using a padlock (not included).

NEMA 3R Enclosure Rating—A raintight NEMA 3R rated enclosure protects these switches from falling liquids and light splashing.

	Switches															Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class
	Switching
	Current, amp	Voltage	Switch Designation	Electrical Phase (hp)	For No. of Wires	For Fuse UL Class	Ht.	Wd.	For Max. Padlock Shackle Dia.	Wire Connection	Enclosure Rating	Certification	Specs. Met		Each		Each
Gray Enamel-Coated Steel with Black/Red Actuator







				3 Circuits Controlled with Lockout, Safety Interlock, and Viewing Window

				30	600V AC/600V DC	3PST	Single (10 hp @ 240V AC) Three (30 hp @ 600V AC)	3	—	15"	7 3/4"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K91	0000000	———	0




						3 Circuits Controlled with Lockout, Safety Interlock, Fuse Holder, and Viewing Window

						30	600V AC/600V DC	3PST	Three (20 hp @ 600V AC)	3	RK1, RK5, J, H	15"	7 3/4"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K76	000000	7499K111	000000


						30	600V AC/600V DC	3PST	Three (20 hp @ 600V AC)	4	RK1, RK5, J, H	15"	7 3/4"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K93	000000	7499K111	00000


						Gray Powder-Coated Steel Housing with Red Actuator







										2 Circuits Controlled with Lockout and Fuse Holder

										30	240V AC/250V DC	DPST	Single (3 hp @ 240V AC)	3	RK1, RK5, K5, H	8 9/16"	5 7/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K24	00000	7524K411	000000




												3 Circuits Controlled with Lockout and Fuse Holder

												30	240V AC/250V DC	3PST	Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	4	RK1, RK5, K5, H	8 9/16"	5 7/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K14	000000	7524K411	000000




														3 Circuits Controlled with Lockout

														30	240V AC/250V DC	3PST	Three (7 1/2 hp @ 240V AC)	3	—	6 3/8"	4 9/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K34	000000	———	0

Washdown Enclosed Motor Switches


Switch with Stainless Steel Housing and Lockout	Switch with Polybutylene Housing and Lockout	Switch with Polybutylene Housing, Lockout, and Power Indicator

Install these switches in areas with oil, coolant, corrosive chemicals, and regular washdowns. They're rated IP69K and NEMA 4X and 12 or 12K. Since they’re already protected inside a housing, you can mount them to a wall if there’s no space left in your electrical panel. You need to grip and twist the lever to actuate, so they won’t accidentally turn on or off if something bumps into them. To lock them in the off position, attach a padlock (not included) to the lever. Use these switches to turn motors on and off, or with other circuits such as lighting and electric heat circuits. They do not provide overload protection.

Polybutylene Housing—Switches with a Polybutylene housing can be turned into a handheld control for moving around your workstation by attaching a cord and cord grip. The housing won’t swell in moist environments.

Power Indicator—Switches with a power indicator use LED lights to show the status of power flowing into the switch and power flowing from the switch to your motor. This can help you check for issues, such as a welded contact or phase loss, without having to open the housing.

					Switching
	No. of Circuits Controlled	Electrical Phase (hp)	Switch Starting Position	Switch Designation	Current, amp	Voltage, V AC	Ht.	Wd.	Wire Connection	Enclosure Rating	Certification	Specs. Met	Flammability Rating		Each
Maintained







				304 Stainless Steel Housing with Lockout

				3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	7.1"	4.9"	Screw Terminal	NEMA 4X, IP69K, NEMA 12K	UL Listed, C-UL Listed	UL 746C	UL 94 5VA	7657K103	0000000




						Polybutylene Housing with Lockout

						3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	8.17"	5.29"	Screw Terminal	NEMA 4X, IP69K, NEMA 12K	UL Listed, C-UL Listed	UL 746C	UL 94 5VA	7657K71	000000




								Polybutylene Housing with Lockout, Power Indicator

								3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	8.2"	5.3"	Screw Terminal	NEMA 4X, IP69K, NEMA 12	UL Listed, C-UL Listed	UL 746C	UL 94 5VA	7657K106	000000

Washdown Enclosed Disconnect Switches


Power Pole	Neutral Pole

These switches cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance.

Use additional power poles to control more than three circuits. Add neutral poles to open and close the neutral leg of a three phase system.

Maintained Switch About Maintained Switch

Switch with Lockout

and Stainless Steel

Housing

Lockout—Switches with lockout secure in the off position with a padlock with a maximum shackle diameter of _5/16” (not included).

IP66 Enclosure Rating—The IP66 rated housing not only shields these switches from washdowns but also makes them durable enough to be mounted outside of an electrical panel.

	Switching
	Current, amp	Voltage, V AC	Switch Designation	Electrical Phase (hp)	Ht.	Wd.	For Max. Padlock Shackle Dia.	Wire Connection	Enclosure Rating	Certification		Each
Stainless Steel Housing with Red Actuator







				3 Circuits Controlled with Lockout

				30	600	3PST	Single (1 hp @ 120V AC) Single (1 1/2 hp @ 240V AC) Three (5 hp @ 240V AC)	7 7/8"	5 15/16"	5/16"	Screw Terminal	IP66	UL Listed, C-UL Listed, CE Marked	6759K61	0000000

Accessories for Disconnect Switches

Switching Current, amp	Certification		Each
30	UL Listed, C-UL Listed, CE Marked	6759K611	000000

		Each
"Main Switch" Label with Adhesive Back—13/16" Ht. × 3 3/16" Wd.	6759K65	000000

Hazardous Location Enclosed Disconnect Switches

Style A

With a housing that’s designed to contain an explosion, these switches are safe to use in areas where ignitable concentrations of flammable or combustible gas, dust, or fibers may be present. Use them to cut power and keep it isolated, so equipment won’t accidentally start up during inspection or maintenance.

Maintained Switch About Maintained Switch

Style A

Powder-Coated Aluminum Housing—Made from aluminum, these switches also resist corrosion in wet or oily areas.

Lockout—Switches have a lockout, so you can secure them in the off position with a padlock (not included).

Hazardous Location Rating—They meet NEC Class I Div. 1 and 2, Groups B, C, D, and Class II, Div. 1 and 2, Groups E, F, and G.

		Switching
	Style	Current, amp	Voltage, V AC	Switch Designation	Electrical Phase (hp)	Ht.	Wd.	For Max. Padlock Shackle Dia.	Wire Connection	Hazardous Location Rating	Enclosure Rating	Certification		Each
Gray Powder-Coated Aluminum Housing with Red Actuator







				3 Circuits Controlled with Lockout

				A	30	600	3PST	Three (30 hp @ 600V AC)	8 1/16"	5 3/4"	5/16"	Screw Terminal	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Zone 1 Groups IIB, IIA	NEMA 4X NEMA 7 NEMA 9	CSA Certified, CSA-US Certified	7857N11	000000000

Enclosed Motor Switches

These switches are housed in a plastic enclosure. Since they’re already protected, you can mount them to a wall if there’s no space left in your electrical panel. You can also turn them into a handheld control and move them around your workstation by attaching a cord and cord grip. The enclosure is plastic, so it won’t swell in moist environments. Easy to operate even if you’re wearing gloves, flip the toggle switch up and down. Use these switches to turn motors on and off, or with lighting and electric heat circuits. They do not provide overload protection.

					Switching
	No. of Circuits Controlled	Electrical Phase (hp)	Switch Starting Position	Switch Designation	Current, amp	Voltage, V AC	Housing Material	Ht.	Wd.	Wire Connection	Environment	Enclosure Rating	Certification		Each
Maintained







				Toggle Switch Actuator

				2	Single (3 hp @ 240V AC)	2 Off	DPST-NO	30	600	Plastic	4.2"	2.8"	Screw Terminal	Indoor Only	NEMA 1	UL Listed, CSA Certified	7657K31	000000


				3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	Plastic	4.2"	2.8"	Screw Terminal	Indoor Only	NEMA 1	UL Listed, CSA Certified	7657K21	000000

Enclosure Disconnect Switches

Install these switches inside an enclosure to prevent it from opening when power is on—turn the switch to disconnect power and release the door. Cut the shaft to fit the enclosure. Use a padlock (not included) to lock switches in the off position.

Use additional power poles to control more than three circuits. Add neutral poles to open and close the neutral leg of a three-phase system.

Switches with Lockout and Fuse Holder

Image of Product. Front orientation. Contains Annotated. Disconnect Switches. Enclosure Disconnect Switches, Switches with Lockout and Fuse Holder.

Switches with a fuse holder are used where overload protection is needed. When the current exceeds the fuse's rating, the fuse will blow, interrupting the circuit to prevent the switch from overheating, breaking, or causing a fire.

Mounting Depth—Mount to DIN rail inside an enclosure; mounting depth is the distance from the panel door to the DIN rail.

Enclosure Rating—All meet at least one safety standard.

	Switches												Replacement Shafts		Replacement Shaft Bases
	Switching
	Current, amp	Voltage, V AC	Electrical Phase (hp)	For No. of Fuses	For Fuse UL Class	Ht.	Wd.	For DIN Rail Ht., mm	Mounting Dp.	Enclosure Rating		Each		Each		Each
Gray Plastic Housing with Black Actuator







				3 Circuits Controlled—For 1 15/32" Dia. Panel Cutouts

				30	600	Single (Not Rated) Three (7 1/2 hp @ 240V AC) Three (20 hp @ 600V AC)	3	J	5 11/32"	5 7/8"	35	7 7/8" to 20 9/16"	IP20	7277K301	0000000	7277K206	000000	7277K207	000000


				Yellow Plastic Housing with Red Actuator







								3 Circuits Controlled—For 1 15/32" Dia. Panel Cutouts

								30	600	Single (Not Rated) Three (7 1/2 hp @ 240V AC) Three (20 hp @ 600V AC)	3	J	5 11/32"	5 7/8"	35	7 7/8" to 20 9/16"	IP20	7277K302	000000	7277K206	00000	7277K207	00000

Accessories and Replacements for Disconnect Switches

Replacement Actuators for Switches with Lockout and Fuse Holder

				Gray Plastic Housing with Black Actuator		Yellow Plastic Housing with Red Actuator
For Switching Current, amp	Ht.	Wd.	Dp.		Each		Each
30, 60, 100	6 7/16"	3 1/16"	1 3/4"	7277K204	000000	7277K205	000000

Auxiliary Contact Blocks for Switches with Lockout and Fuse Holder

No. of Circuits Controlled	Switching Current @ Voltage	Switch Starting Position	Switch Designation		Each
1	6 amp @ 120V AC, 3 amp @ 240V AC	1 Off	SPST	7277K209	000000
1	6 amp @ 120V AC, 3 amp @ 240V AC	1 On	SPST	7277K208	00000

Motor Switches


Toggle Switch Actuator	Lever Actuator

Use these switches to turn motors on and off, or to control lighting and electric heat circuits. They do not provide overload protection.

Toggle Switch Actuator—Toggle switches work like a traditional light switch—just flip the toggle up or down. Even if you’re wearing thick gloves, they’re easy to actuate.

Lever Actuator—Lever switches aren’t easily activated by accident, since you have to grab and twist the lever on or off. They’re useful in crowded or high-traffic spaces where they might be bumped into.

					Switching
	No. of Circuits Controlled	Electrical Phase (hp)	Switch Starting Position	Switch Designation	Current, amp	Voltage, V AC	Ht.	Wd.	Wire Connection	Certification		Each
Maintained







				Toggle Switch Actuator

				2	Single (3 hp @ 240V AC)	2 Off	DPST-NO	30	600	3.7"	1.8"	Screw Terminal	UL Listed, CSA Certified	7657K33	000000


				3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	3.7"	1.8"	Screw Terminal	UL Listed, CSA Certified	7657K23	00000




						Lever Actuator

						3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	3.8"	2.25"	Screw Terminal	UL Listed, CSA Certified	7858N15	000000

Raintight Enclosed Motor Switches

Start and stop motors outdoors and in other wet environments. Rated NEMA 3R, these switches seal out rain and light splashes. They’re housed in a protective aluminum enclosure, so you don’t need to mount them inside an electrical panel. The enclosure is lighter in weight than stainless steel enclosures yet still stands up to water and oil.

In addition to turning motors on and off, these switches work with other circuits, such as lighting and electric heat circuits. They do not provide overload protection.

					Switching
	No. of Circuits Controlled	Electrical Phase (hp)	Switch Starting Position	Switch Designation	Current, amp	Voltage, V AC	Housing Material	Ht.	Wd.	Wire Connection	Environment	Enclosure Rating	Certification	Flammability Rating		Each
Maintained



		2	Single (3 hp @ 240V AC)	2 Off	DPST-NO	30	600	Aluminum	5.8"	4.5"	Screw Terminal	Outdoor, Wet	NEMA 3R	UL Listed, CSA Certified	UL 94 V-2	7657K34	000000


		3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	Aluminum	5.8"	4.5"	Screw Terminal	Outdoor, Wet	NEMA 3R	UL Listed, CSA Certified	UL 94 V-2	7657K24	000000

Hazardous Location Enclosed Motor Switches

Safely turn motors on and off near ignitable gases and dust—the housing on these switches seals in anything that could ignite flammable material. Made from aluminum, the housing is lightweight and durable. It guards against water, oil, and other materials that could cause damage. Even in harsh conditions, there’s no need to mount these switches inside an electrical panel.

You need to grip and twist the lever to actuate these switches, so they won’t accidentally turn on or off if something bumps into them. In addition to starting and stopping motors, they work with other circuits, such as lighting and electric heat circuits. They don’t provide overload protection.

					Switching
	No. of Circuits Controlled	Electrical Phase (hp)	Switch Starting Position	Switch Designation	Current, amp	Voltage, V AC	Housing Material	Ht.	Wd.	Wire Connection	Environment	Hazardous Location Rating	Enclosure Rating	Certification		Each
Maintained







				Lever Actuator

				2	Single (3 hp @ 240V AC)	2 Off	DPST-NO	30	600	Painted Aluminum	6.5"	3"	Screw Terminal	Hazardous	NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G	NEMA 7, NEMA 9	UL Listed, C-UL Listed, CSA Certified	7657K32	0000000


				3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	Painted Aluminum	6.5"	3"	Screw Terminal	Hazardous	NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G	NEMA 7, NEMA 9	UL Listed, C-UL Listed, CSA Certified	7657K22	000000