30A Disconnect Switches | McMaster-Carr

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33 Products

Choosing an Electrical Switch

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).

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.

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.

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

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

Switches
Switching													Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class
Current, A	Voltage	Switch Action	Industry Designation	Electrical Phase (hp)	For No. of Wires	For Fuse Class	Ht.	Wd.	Environmental Rating	Specifications Met		Each		Each
Enamel-Coated Steel with Black Actuator
3 Circuits with Lockout, Safety Interlock
30	600V AC/ 600V DC	Stays Switched (Maintained)	3PDT	Single (10 hp @ 600 V AC) Single (5 hp @ 240 V AC) Single (7 1/2 hp @ 480 V AC)	3	__	29 15/16"	12"	NEMA 1	UL Listed	000000	0000000	000000	00
3 Circuits with Lockout, Safety Interlock, Fuse Holder
30	600V AC/ 600V DC	Stays Switched (Maintained)	3PDT	Single (3 hp @ 240 V AC) Three (5 hp @ 480 V AC) Three (7 1/2 hp @ 600 V AC)	3	RK1, RK5, J, K5, H	38 7/16"	12"	NEMA 1	UL Listed	000000	00000000	000000	00
Enamel-Coated Steel with Black/Red Actuator
3 Circuits with Lockout, Safety Interlock, Viewing Window
30	600V AC/ 600V DC	Stays Switched (Maintained)	3PST	Single (10 hp @ 600 V AC) Three (30 hp @ 600 V AC)	3	__	14 5/8"	7 9/16"	NEMA 1	UL Listed, CSA Certified, Fed. Spec. WS-865C	0000000	000000	000000	00
3 Circuits with Lockout, Safety Interlock, Fuse Holder, Viewing Window
30	600V AC/ 600V DC	Stays Switched (Maintained)	3PST	Three (20 hp @ 600 V AC)	3	RK1, RK5, J, K5, H	14 5/8"	7 9/16"	NEMA 1	UL Listed, CSA Certified, Fed. Spec. WS-865C	0000000	000000	00000000	000000
30	600V AC/ 600V DC	Stays Switched (Maintained)	3PST	Three (20 hp @ 600 V AC)	4	RK1, RK5, J, K5, H	14 5/8"	7 9/16"	NEMA 1	UL Listed, CSA Certified, Fed. Spec. WS-865C	0000000	000000	00000000	00000
Powder-Coated Steel with Red Actuator
2 Circuits with Lockout, Safety Interlock, Fuse Holder
30	240V AC/ 250V DC	Stays Switched (Maintained)	DPST	Single (3 hp @ 240 V AC) Three (7 1/2 hp @ 240 V AC)	3	RK1, RK5, K5, H	14 1/4"	6 5/8"	NEMA 1	UL Listed	0000000	000000	00000000	00000
3 Circuits with Lockout, Safety Interlock, Fuse Holder
30	240V AC/ 250V DC	Stays Switched (Maintained)	3PST	Single (3 hp @ 240 V AC) Three (7 1/2 hp @ 240 V AC)	3	RK1, RK5, K5, H	14 1/4"	6 5/8"	NEMA 1	UL Listed	0000000	000000	00000000	00000
3 Circuits with Lockout
30	240V AC/ 250V DC	Stays Switched (Maintained)	3PST	Single (3 hp @ 240 V AC) Three (7 1/2 hp @ 240 V AC)	3	__	6 3/8"	4 9/16"	NEMA 1	UL Listed	0000000	00000	000000	00

Outdoor Durable Disconnect Switches

A raintight NEMA 3R rated enclosure protects these switches from falling liquids and light splashing. The enclosure is steel, so it withstands tougher conditions than plastic enclosures. All 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).

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.

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.

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

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

Switches
Switching											Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class
Current, A	Voltage	Switch Action	Industry Designation	Electrical Phase (hp)	For No. of Wires	For Fuse Class	Ht.	Wd.		Each		Each
Gray Enamel-Coated Steel with Black/Red Actuator
3 Circuits with Lockout, Safety Interlock, Viewing Window
30	600V AC/ 600V DC	Stays Switched (Maintained)	3PST	Single (10 hp @ 240 V AC) Three (30 hp @ 600 V AC)	3	__	15"	7 3/4"	0000000	0000000	000000	00
3 Circuits with Lockout, Safety Interlock, Fuse Holder, Viewing Window
30	600V AC/ 600V DC	Stays Switched (Maintained)	3PST	Three (20 hp @ 600 V AC)	3	RK1, RK5, J, H	15"	7 3/4"	0000000	000000	00000000	000000
30	600V AC/ 600V DC	Stays Switched (Maintained)	3PST	Three (20 hp @ 600 V AC)	4	RK1, RK5, J, H	15"	7 3/4"	0000000	000000	00000000	00000
Gray Powder-Coated Steel with Red Actuator
2 Circuits with Lockout, Fuse Holder
30	240V AC/ 250V DC	Stays Switched (Maintained)	DPST	Single (3 hp @ 240 V AC)	3	RK1, RK5, K5, H	8 9/16"	5 7/16"	0000000	000000	00000000	000000
3 Circuits with Lockout
30	240V AC/ 250V DC	Stays Switched (Maintained)	3PST	Three (7 1/2 hp @ 240 V AC)	3	__	6 3/8"	4 9/16"	0000000	000000	000000	00
3 Circuits with Lockout, Fuse Holder
30	240V AC/ 250V DC	Stays Switched (Maintained)	3PST	Single (3 hp @ 240 V AC) Three (7 1/2 hp @ 240 V AC)	4	RK1, RK5, K5, H	8 9/16"	5 7/16"	0000000	000000	00000000	000000

Washdown Enclosed Disconnect Switches

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

Switches with lockout secure in the off position with a padlock with a maximum shackle diameter of 5/16” (not included).

Use additional power poles to control more than three circuits.

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

Switch with Lockout and Stainless Steel Housing

Switching
Current, A	Voltage	Switch Action	Industry Designation	Electrical Phase (hp)	Ht.	Wd.		Each
Stainless Steel Housing with Red Actuator
3 Circuits with Lockout
30	600V AC	Stays Switched (Maintained)	3PST	Single (1 hp @ 120 V AC) Single (1 1/2 hp @ 240 V AC) Three (5 hp @ 240 V AC)	7 7/8"	5 15/16"	0000000	0000000

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

0000000

Each

000000

Additional Power Poles

Switching Current, A	Specifications Met		Each
30	UL Listed, C-UL Listed, CE Marked	00000000	000000

Hazardous Location Enclosed Disconnect Switches

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. 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. Use them to cut power and keep it isolated, so equipment won’t accidentally start up during inspection or maintenance.

Made from aluminum, these switches also resist corrosion in wet or oily areas. They have a lockout, so you can secure them in the off position with a padlock (not included).

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

	Switching
	Current, A	Voltage	Switch Action	Industry Designation	Electrical Phase (hp)	Ht.	Wd.	Environmental Rating		Each
Powder-Coated Aluminum Housing with Red Actuator
3 Circuits with Lockout
A	30	600V AC	Stays Switched (Maintained)	3PST	Three (30 hp @ 600 V AC)	8 1/16"	5 3/4"	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	0000000	000000000

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. Mount to DIN rail inside an enclosure; mounting depth is the distance from the panel door to the DIN rail. All meet at least one safety standard.

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.

Add auxiliary contact blocks to send a signal or connect to another device, such as an alarm or indicating light.

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

Switches with Lockout and Fuse Holder

Switches
Switching												Replacement Shafts		Replacement Shaft Bases
Current, A	Voltage	Electrical Phase (hp)	For No. of Fuses	For Fuse Class	Ht.	Wd.	For DIN Rail Ht., mm	Mounting Dp.	Environmental Rating		Each		Each		Each
Gray Plastic Housing with Black Actuator
3 Circuits—For 1 15/32" Panel Cutout Dia.
30	600V AC	Single (Not Rated) Three (7 1/2 hp @ 240 V AC) Three (20 hp @ 600 V AC)	3	J	5 11/32"	5 7/8"	35	7 7/8"-20 9/16"	IP20	00000000	0000000	00000000	000000	00000000	000000
Yellow Plastic Housing with Red Actuator
3 Circuits—For 1 15/32" Panel Cutout Dia.
30	600V AC	Single (Not Rated) Three (7 1/2 hp @ 240 V AC) Three (20 hp @ 600 V AC)	3	J	5 11/32"	5 7/8"	35	7 7/8"-20 9/16"	IP20	00000000	000000	00000000	00000	00000000	00000

Replacement Actuators for Switches with Lockout and Fuse Holder

				Gray Plastic Housing with Black Actuator		Yellow Plastic Housing with Red Actuator
For Switching Current	Ht.	Wd.	Dp.		Each		Each
30A, 60A, 100A	6 7/16"	3 1/16"	1 3/4"	00000000	000000	00000000	000000

Auxiliary Contact Blocks for Switches with Lockout and Fuse Holder

No. of Circuits Controlled	Switching Current @ Voltage	Switch Starting Position	Industry Designation		Each
1	6 A @ 120 V AC, 3 A @ 240 V AC	1 Off (Normally Open)	SPST	00000000	000000
1	6 A @ 120 V AC, 3 A @ 240 V AC	1 On (Normally Closed)	SPST	00000000	00000

Manual Transfer Switches

NEMA 1

If there’s a power outage, flip the toggle for each circuit on these switches to backup power. Each circuit can also be turned off completely. To prevent injury and damage to your generators, they are open transition, meaning the contacts disconnect from one power source before connecting to another. This is also known as break-before-make switching.

Use them with a portable generator.

NEMA 1 switches should be used indoors.

					Housing
Max. Power	Switching Current (No. of Switches)	Circuit Breaker Breakthrough Current	Electrical Phase	Housing Material	Ht.	Wd.	Dp.	Generator Connection Style	Specifications Met		Each
NEMA 1
6 Circuits Total
7,500W	30 A @ 240 V AC (1 DPDT) 20 A @ 240 V AC (1 DPDT) 15 A @ 120 V AC (2 SPDT)	10,000A	Single	Powder-Coated Steel	11 1/4"	7 3/4"	4 3/4"	NEMA L14-30	UL Listed, UL 1008, NEC Article 702	0000000	0000000
12,500W	30 A @ 240 V AC (1 DPDT) 20 A @ 240 V AC (1 DPDT) 15 A @ 120 V AC (2 SPDT)	10,000A	Single	Powder-Coated Steel	11 1/4"	7 3/4"	4 3/4"	CS6375	UL Listed, UL 1008, NEC Article 702	0000000	000000
10 Circuits Total
7,500W	30 A @ 240 V AC (1 DPDT) 20 A @ 240 V AC (1 DPDT) 15 A @ 120 V AC (6 SPDT)	10,000A	Single	Powder-Coated Steel	11 1/4"	11 3/4"	4 3/4"	NEMA L14-30	UL Listed, UL 1008, NEC Article 702	0000000	000000
12,500W	30 A @ 240 V AC (1 DPDT) 20 A @ 240 V AC (1 DPDT) 15 A @ 120 V AC (6 SPDT)	10,000A	Single	Powder-Coated Steel	11 1/4"	11 3/4"	4 3/4"	CS6375	UL Listed, UL 1008, NEC Article 702	0000000	000000